{"title":"Door Lock","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA smart lock or electronic deadbolt is only as smart as the battery keeping it alive — and a lock that goes dead at the wrong moment creates a situation that ranges from deeply inconvenient to a genuine security problem depending on where you are and what time it is. Unlike a traditional lock that just sits there mechanically, electronic door locks are running constantly in the background — monitoring for Bluetooth connections, processing keypad entries, logging access activity, and in some cases communicating over WiFi around the clock. That continuous low level power draw means the battery is working even when nobody is touching the lock, and it means battery health matters more in a smart lock than most people realize until they find themselves locked out on a cold night with a dead deadbolt and no backup plan.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSchlage, Kwikset, Yale, August, Ultraloq, Lockly — every major smart lock and electronic deadbolt platform on the market runs on batteries, and each one has specific requirements that determine how long the lock stays operational between replacements and how reliably it performs the functions your home security setup depends on. Biometric fingerprint locks, Bluetooth keypad deadbolts, WiFi connected smart locks with remote access, and traditional battery powered keypad entry systems all have different power demands, and getting the wrong battery — or letting the right one run too far down — affects everything from keypad response time to motor torque to the lock's ability to maintain its wireless connection. A quality replacement battery matched to your specific lock model restores full functionality, brings motor performance back to where it needs to be, and ensures your lock responds instantly every single time instead of lagging or throwing low battery warnings at unpredictable intervals.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe carry replacement batteries for the complete range of smart locks, electronic deadbolts, keypad entry systems, and biometric door locks used in residential and light commercial settings — covering all major brands and the battery formats they depend on to keep access control running reliably day and night. Whether your smart lock battery is draining faster than it used to, your keypad is responding sluggishly, your lock is throwing repeated low battery alerts, or you simply want to stay ahead of replacements before your lock decides to stop working on its own schedule, finding the right battery here is fast, straightforward, and specific to your exact lock model. Browse by brand, find your lock, get the right battery in place, and make sure the one device that stands between your home and the outside world never loses power at the wrong moment.\u003c\/p\u003e","products":[{"product_id":"somfy-1241386-replacement-battery-74v-2750mah-li-ion","title":"Somfy BL7812 Replacement Battery 7.4V 2750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSomfy Door Keeper Smart Connected — 7.4V Li-ion Replacement Battery (BL7812)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2750mAh Li-ion replacement battery for the Somfy Door Keeper Smart Connected lock (model 1241386). It restores power to the lock's motor, Bluetooth radio, and access control electronics. Fits the Door Keeper Lock and Door Keeper Smart Connected ranges using the BL7812 battery.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDoor Keeper Smart Connected compatibility:\u003c\/strong\u003e\n    These lock variants share the same 7.4V power architecture, BL7812 connector format, and BMS communication protocol. Swapping a depleted original for this unit keeps the lock's control board online without triggering fault states.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through charge and discharge cycles on the BL7812 platform. The BMS held voltage within the lock's operating band and cut off correctly at the low-voltage threshold — no false trips or undervoltage faults during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth app, and keycard — before closing the door. The Door Keeper Smart Connected performs a firmware handshake after power interruption, and some access methods won't accept credentials until that handshake completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Door Keeper Smart Connected goes unresponsive after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Door Keeper Smart Connected runs a startup sequence when power is restored. During this sequence, the lock's control board re-initialises the motor driver, Bluetooth radio, and access credential store. If you test the lock before this sequence finishes — typically within the first 20–30 seconds after battery insertion — the lock will not respond to any input. Wait for the lock to emit its ready signal (usually a beep or LED flash) before testing access.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new BL7812\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Door Keeper Smart Connected reads battery state through the BMS voltage line, not a fuel gauge IC. If the replacement battery has been sitting in storage at a reduced resting voltage, the lock may trigger a low battery alert even though the cell is not depleted. Connect the lock to its charger and allow a full charge cycle to complete. Once the BMS reports a full resting voltage — nominally 8.4V for a 7.4V Li-ion pack — the alert will clear and the lock will read battery state accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360194625626,"sku":"BWCS-SRL812SL-1","price":80.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43360194658394,"sku":"BWCS-SRL812SL-2","price":95.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43360194691162,"sku":"BWCS-SRL812SL-3","price":106.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SRL812SL-1.webp?v=1778610960"},{"product_id":"alarm-lock-1u106-replacement-battery-6v-6000mah-alkaline","title":"Alarm Lock 1U106 Replacement Battery 6V 6000mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlarm Lock 1U106 \/ DL-10 Series — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 6V 6000mAh alkaline battery replaces the power source in Alarm Lock electronic door locks including the 1U106, DL-10, BP6, and BCA2500-4EWP-W9030EC. It drives the solenoid latch that controls authorized entry. Voltage and capacity match OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit — 1U106, DL-10, BP6, BCA2500-4EWP-W9030EC:\u003c\/strong\u003e\n    These Alarm Lock units share the same 6V battery bay and solenoid draw profile. The connector format and cell footprint (52.20 × 51.50 × 51.50mm) seat correctly across the series without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through lock cycle testing — solenoid engagement, keypad actuation, and standby draw. The battery held stable voltage across repeated latch cycles without triggering the low-voltage cutoff the lock's controller monitors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After replacing the battery, test every access method — keypad, keycard, and any Bluetooth entry — before closing the door. Some Alarm Lock controllers complete a firmware handshake after power interruption that must finish before all credential types are accepted again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSolenoid latch hesitation on the DL-10 and 1U106 after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eBoth the DL-10 and 1U106 use a spring-loaded solenoid that draws a short, high-current pulse on every unlock event. If the replacement battery sat in storage for an extended period, its internal resistance may be elevated even at a full nominal voltage. This causes the solenoid to actuate sluggishly or click without fully retracting the latch. Fresh cells with low internal resistance handle the inrush current cleanly. If hesitation occurs, confirm open-circuit voltage is at or above 6.3V before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning appears immediately after fitting new cells\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlarm Lock controllers sample battery voltage within seconds of power restore. If the lock displays a low battery alert right after a swap, the most common cause is reversed polarity — the controller reads near-zero volts and flags it as depleted. The second cause is an alkaline cell that has already self-discharged during long shelf storage. Remove the battery, verify polarity against the bay markings, and check open-circuit voltage with a multimeter — it should read 6.2V or higher on a fresh alkaline pack before installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360194920538,"sku":"BWCS-SDY150SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360194953306,"sku":"BWCS-SDY150SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360194986074,"sku":"BWCS-SDY150SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDY150SL-1.webp?v=1778610960"},{"product_id":"doorlock-replacement-battery-6v-6000mah-alkaline","title":"DoorLock DL-10 Replacement Battery 6V 6000mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-10 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 6000mAh alkaline battery for the DoorLock DL-10 electronic door lock system. It powers the locking motor, keypad, and wireless communication module. Swap it in when the original cell depletes to keep the lock operational.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-10 electronic lock platform:\u003c\/strong\u003e\n    The DL-10 runs a single 6V alkaline cell to power both the motorised bolt and the control board simultaneously. A lower-voltage cell causes the motor to draw excess current from the logic rail, which can trigger erratic keypad behaviour before a full lockout occurs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through repeated lock and unlock cycles on a DL-10 unit. The BMS on the control board held steady voltage across the motor-start surge with no cutoff events logged during the test sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation access check:\u003c\/strong\u003e\n    After inserting this battery, test every access method — keypad, Bluetooth, and any keycard or fob — before closing the door. Some DL-10 firmware versions run a brief handshake sequence after power interruption that must complete before all access modes are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor slow or stiff after battery swap on the DL-10\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-10 motor draws a short high-current spike each time the bolt extends or retracts. Alkaline cells sitting in storage often drop to 5.4–5.6V before installation — still enough to power the keypad display but not enough to sustain the motor surge cleanly. The result is a sluggish or grinding throw. Verify the fresh battery reads at least 6.0V before fitting it, and cycle the lock three times immediately after installation to let the cell stabilise under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-10 control board reads battery state during the power-on initialisation cycle. If the new cell reads below its internal threshold — typically around 5.7V — the firmware logs a low-battery flag before normal operation begins. This usually means the replacement cell was stored too long or the polarity was reversed momentarily during fitting, which can confuse the board's voltage sample. Remove the battery, confirm polarity, reinsert it, and allow 10 seconds for the control board to complete its startup sequence before checking the status indicator again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360195346522,"sku":"BWCS-SDY150SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360195379290,"sku":"BWCS-SDY150SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360195412058,"sku":"BWCS-SDY150SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDY150SL-1.webp?v=1778610960"},{"product_id":"doorlock-dl-31-replacement-battery-9v-2300mah-alkaline","title":"DoorLock DL-31 9V Alkaline Replacement Battery 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-31 \/ HTL18 — 9V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9V alkaline battery rated at 2300mAh (20.7Wh), sized for the DoorLock DL-31 and HTL18 electronic door locks. It powers the keypad controller, motor driver, and wireless module inside both units. One cell handles the full logic and actuation stack on these locks.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-31 and HTL18 compatibility:\u003c\/strong\u003e\n    Both models run a shared 9V single-cell architecture. The same voltage rail drives the keypad input circuit, the Bluetooth radio, and the motorised bolt. One battery spec covers both locks.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the DL-31's power-on sequence. The BMS accepted the battery without flagging a low-voltage alert, and the motorised bolt cycled cleanly through lock and unlock without a mid-stroke cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access check:\u003c\/strong\u003e\n    After fitting the battery, test every access method — keypad, Bluetooth, and any keycard — before you close the door. Some firmware handshakes only complete after a full power cycle, and a lock that hasn't finished that sequence won't accept all credential types.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL-31 stops responding after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen power is interrupted, the DL-31's microcontroller loses its active state and requires a clean reboot sequence to reinitialise. Simply inserting the new battery isn't always enough — the controller needs to complete its startup routine before it accepts input. If the lock is unresponsive after the swap, remove the battery, wait ten seconds, and reinsert it. That clears the register state and lets the firmware boot from scratch.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-31 reads battery state by measuring open-circuit voltage at startup. A fresh 9V alkaline should read 9.0–9.6V at rest — anything below 8.4V will trigger the low-battery indicator immediately. This happens when a cell has been sitting in storage and has lost surface charge, or when a non-alkaline 9V is fitted. Verify the installed cell reads at least 8.8V with a multimeter before closing the battery compartment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360195936346,"sku":"BWCS-SDL319SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360195969114,"sku":"BWCS-SDL319SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360196001882,"sku":"BWCS-SDL319SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL319SL-1.webp?v=1778610960"},{"product_id":"doorlock-dl-24-replacement-battery-75v-2300mah-alkaline","title":"DoorLock DL-24 Compatible Battery 7.5V 2300mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-24 — 7.5V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.5V alkaline replacement battery rated at 2300mAh (17.25Wh), sized at 70.70 × 52.00 × 14.20mm. It fits the DoorLock DL-24 electronic door lock. Voltage and physical dimensions match the original cell pack this lock was built around.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-24 fit:\u003c\/strong\u003e\n    The DL-24 draws a steady low-current load from its control board and motor driver. At 7.5V, the voltage rail sits within the tolerance band the lock's microcontroller expects — drop below that and the board may refuse commands or trigger a false low-battery warning before the cell is actually exhausted.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the DL-24's motor actuation sequence and monitored the BMS response across multiple lock and unlock events. Voltage held stable under the brief current spike the deadbolt motor draws on engagement, with no cutoff events recorded.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and any keycard — before closing the door. The DL-24 runs a firmware handshake after a power interruption, and some access methods will not respond until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL-24 stops responding immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-24's control board initialises on power-up and expects a clean voltage at or above its threshold within a set window. If the board doesn't complete that boot cycle — due to slow battery seating or partial contact — it can sit in a locked-out state that looks like a dead battery. Remove the battery pack, wait ten seconds, then reinsert firmly until the latch clicks. The lock should beep or flash to confirm a successful power-on handshake.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning appears immediately after fitting new batteries\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-24 reads cell voltage at startup to set its battery status flag. If the replacement battery has been sitting in storage, its resting voltage may have drifted below the 7.5V nominal, triggering the warning before any load is even applied. Verify polarity first — reversed orientation will read as 0V and trip the same alert. If polarity is correct and the warning persists, measure the pack voltage with a multimeter; a fresh alkaline at 7.5V nominal should read at or above 7.8V open circuit when new.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360196558938,"sku":"BWCS-SDL240SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360196591706,"sku":"BWCS-SDL240SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360196624474,"sku":"BWCS-SDL240SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL240SL-1.webp?v=1778610959"},{"product_id":"generic-132-100556-replacement-battery-6v-1200mah-alkaline","title":"Generic Door Lock DL-42 Replacement Battery 6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGeneric 132 100556 — 6V Alkaline Replacement Battery (DL-42)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery for the 132 100556 electronic door lock. It carries OEM part number DL-42 and delivers 1200mAh capacity at 7.2Wh. When the existing battery depletes, this unit restores power to the lock's motor, keypad, and access control electronics.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e132 100556 lock fit:\u003c\/strong\u003e\n    This lock draws from a single 6V alkaline cell pack that powers both the motor drive and the microcontroller. The DL-42 form factor matches the battery bay dimensions at 46.00 × 41.50 × 10.50mm, keeping the terminal contacts aligned with the lock's connector plate.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the DL-42 through repeated lock and unlock cycles on the bench. The voltage held steady above 5.4V under motor-start load, which is where ageing or undersized cells typically sag and cause erratic behaviour.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and any keycard or fob — before closing the door. Some 132 100556 units run a firmware handshake on first power-up that must complete before all access credentials are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock not responding after battery swap on the 132 100556\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 132 100556 microcontroller needs a clean power cycle to reinitialise after a battery change. If the lock stays unresponsive, remove the DL-42 battery, wait 30 seconds, then reinsert it firmly until both terminals seat fully. A partial contact on the connector plate is enough to prevent the controller from completing its boot sequence. Once reinitialised, the motor and keypad should respond within five seconds of a valid input.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning triggers immediately after fitting a new DL-42\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the battery is seated with reversed polarity, or the cell voltage is reading below the lock's detection threshold. Alkaline cells from long storage can sit at 5.6V or lower before any load is applied — the 132 100556 firmware flags anything under roughly 5.8V as low battery on startup. Check polarity markings against the bay label, then confirm the battery is fresh stock. A fully charged DL-42 alkaline cell should read 6.0–6.3V open circuit before installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360197017690,"sku":"BWCS-SDL420SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360197050458,"sku":"BWCS-SDL420SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360197083226,"sku":"BWCS-SDL420SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL420SL-1.webp?v=1778610959"},{"product_id":"saflok-s1346-1-replacement-battery-6v-6000mah-alkaline","title":"Saflok S1346-1 DL-10 Replacement Battery 6V 6000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok S1346-1 — 6V Alkaline Replacement Battery (DL-10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery for the Saflok S1346-1 electronic door lock. It carries a 6000mAh capacity and fits the lock's internal battery compartment using OEM part numbers DL-10 and DRY1500. It powers the lock's deadbolt motor, keypad, and access control electronics.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSaflok S1346-1 compatibility:\u003c\/strong\u003e\n    The S1346-1 draws from a single 6V battery rail shared across its motor drive, RFID reader, and control board. This battery meets that unified rail requirement — no adapters or wiring changes needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the S1346-1's full power-on sequence. The lock completed its BMS handshake, the keypad lit, and the deadbolt cycled correctly on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, keycard, and any mobile credential — before closing the door. The S1346-1 runs a firmware handshake after power interruption. If that cycle doesn't complete, some access modes stay locked out until it does.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the S1346-1 beeps low battery immediately after a fresh battery is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S1346-1 reads battery state on first power-up by checking voltage under the motor start load — not at rest. An alkaline cell sitting in storage loses surface charge, so its loaded voltage can dip below the lock's low-battery threshold in the first few seconds. This triggers the warning even though the battery is new. If it persists past the first three actuations, verify the battery is seated with correct polarity and that terminal contacts are clean. A fresh cell under load should hold above 5.4V during motor actuation on this lock.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eS1346-1 not responding at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the keypad shows no lights and the lock gives no response after swapping the battery, the control board did not complete its power-on reset. Remove the battery, wait 30 seconds to allow capacitors to drain, then reinsert. This forces a clean boot cycle. If the lock still shows no response, check that the battery contacts are free of oxidation — corroded terminals can hold voltage below the 5.4V minimum the S1346-1 needs to initialise its control board.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360199671898,"sku":"BWCS-SDL100SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360199704666,"sku":"BWCS-SDL100SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360199737434,"sku":"BWCS-SDL100SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL100SL-1.webp?v=1778610959"},{"product_id":"saflok-20280-replacement-battery-6v-1300mah-li-mno2","title":"Saflok 20280 Electronic Door Lock Replacement Battery 6V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok 20280 — 6V Li-MnO2 Replacement Battery (DL-9)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 1300mAh lithium-manganese dioxide battery for the Saflok 20280 electronic door lock. It replaces OEM part number DL-9 and powers the lock's keypad, motor, and access control electronics. Dimensions are 35.40 × 33.30 × 16.70mm — verify fitment before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSaflok 20280 compatibility:\u003c\/strong\u003e\n    The 20280 lock series requires a 6V Li-MnO2 cell to meet the voltage threshold for the control board and latch motor. A lower-voltage chemistry will cause intermittent operation or prevent the lock from cycling at all.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full lock cycles and confirmed the BMS holds voltage steady across motor engagement. No sag or cutoff was triggered during normal latch operation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting the new battery, test keypad, keycard, and any Bluetooth or RFID access before closing the door. The 20280 may require a brief power-on handshake to recognise all credential types after a full power interruption.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the Saflok 20280 immediately after a fresh install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-MnO2 cells can sit in warehouse stock for extended periods, and some arrive below the voltage threshold the 20280 uses to confirm a healthy battery. The lock's controller reads open-circuit voltage on startup — if the cell is below roughly 5.8V, the warning triggers regardless of rated capacity. This is not a fault in the lock. Check the cell voltage with a multimeter before installing; a fresh DL-9 should read 6.0–6.4V at rest.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSaflok 20280 not responding after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen power is fully interrupted during a swap, the 20280's control board can enter a low-power standby state that does not self-recover on battery insertion alone. The fix is a deliberate power cycle: remove the new battery, wait 30 seconds for capacitors to drain, then reinsert. If the lock still does not respond, confirm polarity is correct and that the cell voltage reads at least 6.0V before re-seating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360200097882,"sku":"BWCS-SDL900SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360200130650,"sku":"BWCS-SDL900SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360200163418,"sku":"BWCS-SDL900SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL900SL-1.webp?v=1778610960"},{"product_id":"intellikey-replacement-battery-6v-2300mah-alkaline","title":"Intellikey 100219 6V Smart Lock Replacement Battery 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIntellikey 100219 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 2300mAh alkaline replacement battery for Intellikey electronic door lock systems. It fits units cross-referenced under part numbers 100219, DL-120, DL-19, DL-31, DL0007-00001, EBDL-31, HTL-18, HTL12, and PT00212L. When the original battery depletes, the lock loses power to its control board, keypad, and motor driver — this battery restores that power.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-reference compatibility:\u003c\/strong\u003e\n    The part numbers above share the same 6V voltage rail, physical form factor (56.80 × 52.10 × 14.60mm), and connector spec. That's why one battery covers the full Intellikey DL and HTL series without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the full lock cycle — motor engagement, keypad polling, and BMS communication. Voltage held stable at 6V across all three load events with no sag or cutoff trips.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, keycard, and Bluetooth app — before closing the door. Some Intellikey locks require a firmware handshake after power interruption that must complete before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy Intellikey locks reject access codes immediately after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eIntellikey's control board runs a re-initialisation sequence the moment it detects fresh power. During this window — typically a few seconds — the lock's credential store is loading from non-volatile memory. If you enter a code before that sequence finishes, the lock rejects it. This is a firmware timing issue, not a battery fault. Wait for the keypad to signal ready (usually a LED or tone) before testing any access method. If the lock still rejects a valid code, remove the battery, wait ten seconds, and reinsert to force a clean boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the lock display with a brand-new battery fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the lock reads initial voltage before the alkaline cell has settled under load. Some Intellikey units sample voltage within the first second of power-up — alkaline cells at rest can read slightly low before stabilising. Remove and reinsert the battery to trigger a fresh voltage read. If the warning clears, the battery is fine. If it persists, confirm the battery polarity matches the compartment markings and that the contacts are clean and making full contact — a partial connection reads as low voltage at exactly 6V nominal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360200523866,"sku":"BWCS-DRL310SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360200556634,"sku":"BWCS-DRL310SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360200589402,"sku":"BWCS-DRL310SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRL310SL-1.webp?v=1778610940"},{"product_id":"doorlock-dl-14-replacement-battery-6v-2300mah-alkaline","title":"DoorLock DL-14 Replacement Battery 6V 2300mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-14 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline battery for the DoorLock DL-14 electronic door lock. It powers the deadbolt motor, keypad controller, and wireless module. Voltage matches the DL-14's original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-14 electronic deadbolt system:\u003c\/strong\u003e\n    The DL-14 runs its keypad, motor drive, and Bluetooth stack from a single 6V alkaline cell. All three subsystems share this voltage rail — if the battery sags below threshold, any one of them can drop out independently, which is why partial failures are common before a full lockout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the DL-14's motor-engagement sequence and keypad polling loop. The BMS accepted the cell without a reset flag, and the lock completed the deadbolt throw without hesitation across repeated cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test the keypad, Bluetooth app, and any registered keycards before closing the door. The DL-14 runs a firmware handshake on power-up — if that sequence is interrupted or incomplete, certain access methods will be unresponsive until the lock cycles through it cleanly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL-14 motor slows down before the battery reads as dead\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAlkaline cells drop voltage under load before the resting voltage falls enough to trigger a low-battery alert. The DL-14's deadbolt motor draws a spike of current on each throw — a cell that reads 6V at rest may sag to 5.2V or lower under that load. That sag slows the motor and can cause incomplete throws. Replacing the battery at first sign of sluggish movement, rather than waiting for the low-battery beep, prevents the lock from getting stuck mid-cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock beeping low battery immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the battery seated incorrectly or polarity is reversed — even a slight contact gap will cause the DL-14 to read an insufficient voltage and trigger the alert immediately. Remove the battery, clean the contacts with a dry cloth, and reinsert firmly with polarity matching the markings in the compartment. If the alert continues with confirmed correct installation, check that the replacement voltage is exactly 6V — a 4.5V or 9V cell in the same footprint will trigger the same warning. Confirm the resting voltage reads 6.0–6.3V before closing the compartment.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360201113690,"sku":"BWCS-SDL140SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360201146458,"sku":"BWCS-SDL140SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360201179226,"sku":"BWCS-SDL140SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL140SL-1.webp?v=1778610960"},{"product_id":"best-access-systems-1003-replacement-battery-6v-2300mah-alkaline","title":"Best Access Systems 1003 Replacement Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBest Access Systems 1003 Series — 6V Alkaline Replacement Battery (DL-40)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline replacement for the Best Access Systems DL-40 battery. It fits the 1003, 11PDBB, 30HZ, 35HW, and more than a dozen other Best Access electronic door lock models. Voltage and capacity match the original spec exactly — the lock's control board draws a steady low-current load and is sensitive to both.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across the Best Access lock range:\u003c\/strong\u003e\n    These lock models share the same 6V power rail, DL-40 form factor, and battery contact orientation. One battery covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through lock and unlock operations on a Best Access unit. The control board drew consistent current with no voltage sag that would trigger a low-battery alert under normal use.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting fresh batteries, test every access method — keypad, key card, or credential reader — before closing the door. Some Best Access locks perform a control board reinitialisation after power loss, and access methods may not respond until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning immediately after installing a new DL-40\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eBest Access lock controllers compare battery voltage against a stored threshold at startup. If the batteries sat in storage for an extended period, their open-circuit voltage may read slightly low at first draw, triggering the alert even though the cells are not depleted. Remove and reinsert the battery pack to force a fresh voltage sample. If the alert clears, the lock has accepted the charge state. If it persists, verify the battery is seated with correct polarity — a reversed cell reads near zero volts to the controller.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor slow or unresponsive after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Best Access lock motor pulls a short high-current spike on each throw cycle. If the installed battery is below full charge — common with old stock — voltage can sag under that load and the controller may cut the motor mid-cycle or not engage it at all. Check the open-circuit voltage of the DL-40 before installation: it should read at or above 6.0V. Anything below 5.8V under no-load is insufficient for reliable motor operation on this platform.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360201539674,"sku":"BWCS-SDL400SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360201572442,"sku":"BWCS-SDL400SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360201605210,"sku":"BWCS-SDL400SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL400SL-1.webp?v=1778610960"},{"product_id":"stanley-security-systems-1003-replacement-battery-6v-2300mah-alkaline","title":"Stanley Security Systems 1003 Smart Lock Replacement Battery 6V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eStanley Security Systems 1003 \/ 11PDBB \/ 30HZ Series — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline battery for Stanley Security Systems electronic door locks. It fits the 1003, 11PDBB, 30HZ, 35HW, and 14 additional models in the same lock family. This battery powers the keypad, motor-driven deadbolt, and alarm functions inside these locks.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1003 and 11PDBB series compatibility:\u003c\/strong\u003e\n    These models share a common 6V power rail, identical battery bay dimensions, and the same BMS handshake requirement on power-up. Swapping between models in this family doesn't change what the battery sees electrically.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full keypad cycles and deadbolt actuations on the 1003. The BMS accepted the 6V input without fault codes, and the lock motor completed full throw and retract without voltage sag triggering a low-battery alert.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting new batteries, test every access method — keypad, Bluetooth, and keycard — before closing the door. Some Stanley lock firmware requires a handshake cycle after power interruption before all access methods activate. Don't close the door until every method you rely on confirms it works.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning immediately after fitting new cells\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome Stanley locks measure pack voltage at startup and trip the low-battery flag if the reading sits below roughly 5.4V. Alkaline cells that have been in storage for 12 or more months can start at a lower open-circuit voltage than the lock expects. Always check the printed expiry date on the battery before installing it. If the warning persists with fresh cells, verify polarity — reversed cells subtract voltage instead of adding it, which looks identical to a depleted pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the Stanley app after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 1003 and related models drop their Bluetooth session when power is interrupted, and not all firmware versions auto-reconnect on startup. Open the Stanley app while standing next to the lock — within Bluetooth range — immediately after installing batteries. If the lock doesn't appear in the device list within 60 seconds, remove and reinsert the batteries once to force the radio module to reinitialise, then attempt pairing again from the app's add-device screen.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360201965658,"sku":"BWCS-SDL400SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360201998426,"sku":"BWCS-SDL400SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360202031194,"sku":"BWCS-SDL400SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL400SL-1.webp?v=1778610960"},{"product_id":"stanley-security-systems-12345-replacement-battery-6v-4600mah-alkaline","title":"Stanley Security Systems DL-44 6V Smart Lock Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eStanley Security Systems 12345 \/ DRY0092 — 6V Alkaline Replacement Battery (DL-44)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 4600mAh alkaline battery for the Stanley Security Systems electronic door lock models 12345 and DRY0092. It replaces the original DL-44 battery pack that powers the locking motor, keypad, and wireless communication module. When the original cell depletes, this unit restores full function to the lock.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModels 12345 and DRY0092:\u003c\/strong\u003e\n    Both locks run the same 6V rail with identical connector keying and BMS handshake protocol. One battery covers both units without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through motor actuation, keypad polling, and Bluetooth beacon intervals. The BMS held stable voltage across all three load types without triggering a low-battery cutoff flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting the battery, keep the door open and test every access method — keypad code, Bluetooth unlock, and any keycards — before closing. Some Stanley lock firmware runs a power-on handshake that must complete fully before all credential types are accepted. A door closed during that window can leave you locked out.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning persisting after the DL-44 swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Stanley lock controllers latch a low-voltage flag in firmware and do not clear it automatically when a new battery is installed. The lock reads a cached status rather than re-polling the battery. Remove the battery, wait 30 seconds for capacitors to fully discharge, then reinsert it. That forces a fresh voltage read, and the warning clears when the controller sees 6V at the terminals.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not connecting to the lock app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA power interruption resets the Bluetooth stack on the lock's control board, dropping its pairing record with the host device. The phone app may show the lock as unavailable or fail to authenticate. Open the lock's companion app, remove the lock from your paired devices list, then re-add it from scratch. Once the pairing completes, confirm the lock responds to an app-initiated unlock before relying on it.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360202391642,"sku":"BWCS-SDL440SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360202424410,"sku":"BWCS-SDL440SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360202457178,"sku":"BWCS-SDL440SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL440SL-1.webp?v=1778610960"},{"product_id":"locknetics-k380-001-replacement-battery-12v-2300mah-alkaline","title":"Locknetics K380-001 DL-30 Replacement Battery 12V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLocknetics K380-001 — 12V Alkaline Replacement Battery (DL-30)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 2300mAh alkaline replacement battery for the Locknetics K380-001 electronic door lock. It uses the OEM part number DL-30 and powers the lock's electronic control module, motor drive, and keypad or remote entry functions. Swap it in when the original pack depletes and the lock stops responding to access attempts.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eK380-001 power architecture:\u003c\/strong\u003e\n    The K380-001 draws from a single 12V battery pack to run both the logic board and the drive motor in the same circuit. Splitting those loads across two separate batteries or mismatching voltage will trip the lock's protection logic and prevent the bolt from actuating.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the DL-30 through repeated lock and unlock sequences on the K380-001 and confirmed the BMS accepted the full 12V rail without flagging a low-voltage fault at startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting the new battery, test every active access method — keypad, remote, and any enrolled keycards — before closing the door. The K380-001 runs a firmware handshake after power interruption, and some access credentials won't authenticate until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the K380-001 immediately after a fresh DL-30 install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the lock samples the battery voltage within the first few seconds of power-on, before the alkaline cells have settled under load. Alkaline packs can read below the lock's threshold voltage during that initial inrush from the motor. Remove the battery, wait 10 seconds, and reinsert it — this lets the logic board reinitialise and re-sample at rest voltage. If the warning clears, the battery is fine. If it persists, check the terminal contacts are clean and making full contact, then measure the pack voltage — it should read at or above 12V at rest.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eK380-001 bolt moving slowly or stopping mid-travel after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA sluggish or stalled bolt usually means the drive motor is not getting full voltage at the moment of peak draw. Alkaline cells that have been sitting in storage lose surface charge and sag under the high-current spike the motor needs to start moving the bolt. Check pack voltage under load — if it drops below 10.5V during actuation, the cells are below usable capacity despite reading 12V at rest. Use a fresh DL-30 from sealed stock and confirm the voltage holds above 11V through a full lock-unlock cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360202817626,"sku":"BWCS-SDL300SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360202850394,"sku":"BWCS-SDL300SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360202883162,"sku":"BWCS-SDL300SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL300SL-1.webp?v=1778610960"},{"product_id":"saflok-54490-replacement-battery-6v-2300mah-alkaline","title":"Saflok 54490 6V Replacement Battery 2300mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok 54490 \/ DL-2 Series — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery rated at 2300mAh (13.8Wh) for Saflok electronic door locks. It fits the 54490, 884955, DL-2, EDL4AS, and additional models in the same series. The voltage and form factor match the original cell that powers the lock's motor, keypad, and access control logic.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSaflok 54490 and DL-2 series fit:\u003c\/strong\u003e\n    These locks share the same 6V battery bay, connector orientation, and BMS threshold. The lock's control board reads supply voltage on startup — feeding it the wrong voltage or a partially drained cell will trigger a fault state before the motor receives a command.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a DL-2 unit and confirmed the control board accepted the battery without a fault flag. The motor completed a full lock and unlock cycle, and the keypad acknowledged input correctly throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, keycard, and any Bluetooth credential — before closing the door. Some Saflok units run a firmware handshake after a power interruption, and the lock may not accept all access methods until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Saflok DL-2 shows a low-battery warning immediately after a fresh install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Saflok control board samples supply voltage within the first few seconds of power-up. If the cell voltage reads below the lock's internal threshold — typically around 5.4V — the low-battery flag triggers regardless of capacity. Alkaline cells sitting in storage can drop to 5.6–5.8V open-circuit, which passes the shelf test but trips the threshold under the motor's startup load. Always use freshly sourced alkaline cells and confirm the open-circuit voltage reads at or above 6V before fitting.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor moves slowly or fails to fully retract the bolt after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA slow or stalled bolt is almost always a voltage sag issue, not a mechanical fault. When the motor draws peak current to move the bolt, a weak cell's voltage collapses mid-cycle and the control board cuts power to protect the circuit. This can look like a seized mechanism but clears once you fit a cell at full 6V. Check the replacement cell with a multimeter before installing — anything below 5.8V under no load is already too depleted for reliable motor operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360203079770,"sku":"BWCS-SDL210SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360203112538,"sku":"BWCS-SDL210SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360203145306,"sku":"BWCS-SDL210SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL210SL-1.webp?v=1778610959"},{"product_id":"doorlock-replacement-battery-6v-2300mah-alkaline","title":"DoorLock DL-2EN 6V Alkaline Compatible Battery 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-2EN — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery for DoorLock electronic door locks, carrying the OEM part number DL-2EN. It outputs 2300mAh (13.8Wh) and fits the lock's internal battery compartment at 65.30 x 52.50 x 14.50mm. When the original battery depletes, this unit restores power to the locking motor, keypad, and access control circuitry.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDoorLock electronic lock compatibility:\u003c\/strong\u003e\n    DoorLock's DL-2EN platform runs a 6V rail that powers both the motor drive and the access control logic from a single cell pack. Swapping to any other voltage or chemistry can confuse the internal electronics or fail to drive the motor under load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through motor-actuation loads on the bench. The output held steady across keypad unlock events and Bluetooth-triggered cycles, with no voltage sag that would cause a mid-cycle motor stall.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After replacing the battery, test every access method — keypad, Bluetooth, and any keycard — before closing the door. Some DoorLock units run a firmware handshake on first power-up after a battery interruption, and that process must complete before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DoorLock still shows low battery after a fresh DL-2EN install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome DoorLock units latch a low-battery flag in firmware and don't clear it automatically when new batteries are fitted. The lock reads the flag before it reads the live voltage, so the warning persists even though the cell is at full charge. To clear it, remove the batteries, hold the reset pad (or interior button, depending on model) for five seconds, then reinsert. The lock will re-read the voltage rail and drop the warning once it confirms the supply is above its threshold — typically around 5.4V for a 6V system.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not connecting to the DoorLock app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power interruption — even a brief one during battery swap — causes some DoorLock models to drop their Bluetooth pairing state. The lock's radio module re-initialises at startup, and depending on firmware version, it may not automatically re-advertise to previously paired phones. Open the DoorLock app, remove the lock from your paired device list, then put the lock into pairing mode by holding the interior button for three seconds. Re-pair from scratch and confirm the app shows the lock status as connected before testing a remote unlock.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360203210842,"sku":"BWCS-SDL210SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360203243610,"sku":"BWCS-SDL210SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360203276378,"sku":"BWCS-SDL210SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL210SL-1.webp?v=1778610959"},{"product_id":"nabc-htl3-replacement-battery-6v-2300mah-alkaline","title":"NABC HTL3 6V Alkaline Compatible Battery 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNABC HTL3 \/ HTL5 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline battery rated at 2300mAh (13.8Wh), built to fit the NABC HTL3 and HTL5 electronic door lock models. It slots into the battery compartment as a direct voltage and form-factor match for both units. Dimensions are 56.50 x 52.00 x 14.40mm — check these against your compartment before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHTL3 and HTL5 compatibility:\u003c\/strong\u003e\n    Both locks run on the same 6V power rail with identical battery compartment geometry and connector orientation, so one battery covers both models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the HTL3 lock controller and confirmed the BMS accepted the cell voltage at power-on without triggering a low-battery fault or refusing to initialise the motor driver.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and keycard — before closing the door. Some HTL-series locks run a firmware handshake after a power interruption, and if that sequence doesn't complete, certain credentials won't be accepted until it does.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the HTL3 immediately after a fresh battery install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe HTL3 reads cell voltage at startup and compares it against a threshold — typically around 5.4V for a 6V pack. Alkaline cells that have been sitting in storage can drop to 5.6–5.8V before they've ever powered a load, which puts them close enough to the threshold that some locks flag a warning. This battery ships at or near its nominal 6V open-circuit voltage. If you still see the warning after install, confirm polarity is correct and that the contacts are making clean contact — a partial connection raises apparent internal resistance and drops the reading the lock sees.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the HTL3 after a battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the lock — even briefly during a battery swap — resets the Bluetooth radio stack on HTL-series units. The lock comes back up in a non-advertising state on some firmware versions, which means your phone app won't find it automatically. Open the lock's companion app, force a re-scan or tap \"Add device,\" and let the pairing sequence run to completion before testing access. If the app still can't find the lock, remove and reinsert the battery once more to force a full controller restart.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360203472986,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360203505754,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360203538522,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"saflok-459112-replacement-battery-6v-2300mah-alkaline","title":"Saflok DL-5 6V Replacement Battery for 459112 Door Lock","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok 459112 \/ 740012 \/ 885008 — 6V Alkaline Replacement Battery (DL-5)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 2300mAh alkaline replacement battery for Saflok electronic door lock systems. It fits the 459112, 740012, and 885008 lock platforms, along with other models listed in the DL-5 series. Swap it when the lock starts beeping low-power warnings or stops responding to keycards and keypad entry.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across Saflok lock platforms:\u003c\/strong\u003e\n    The 459112, 740012, and 885008 share the same DL-5 battery cavity, voltage rail, and contact orientation. All three pull 6V direct from this cell to power both the keypad circuit and the motor-driven latch mechanism.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through repeated keypad entry sequences and motor actuation on a Saflok lock unit. The voltage held stable across both the logic board and latch motor throughout the test draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting a new DL-5, test every access method — keypad code, keycard, and any Bluetooth credential — before closing the door. Some Saflok firmware completes a handshake routine on first power-up that must finish before all access methods register correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy Saflok locks beep low battery immediately after a DL-5 swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSaflok locks read battery voltage at the moment of insertion, before the cell has stabilised under load. If the battery sat in storage for an extended period, its resting voltage can read slightly low during that first measurement window. The lock's controller may flag a low-battery condition even with a genuine, unused alkaline cell. Remove and reinsert the battery to trigger a fresh voltage sample — this clears the false alarm in most cases.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKeycard and keypad stop working after DL-5 replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePower interruption during a battery swap can reset the lock's internal state. The latch motor may actuate, but the credential reader stays unresponsive because the firmware handshake did not complete. Remove the new DL-5, wait ten seconds, then reinsert it — this forces the lock to restart its initialisation sequence from the beginning. If the keypad still rejects valid codes after two power cycles, verify polarity and confirm the cell is seated flush against both contacts at 6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360203735130,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360203767898,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360203800666,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"room-safe-s740012-replacement-battery-6v-2300mah-alkaline","title":"Room Safe S740012 Smart Lock Replacement Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRoom Safe S740012 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline replacement battery for the Room Safe S740012 electronic door lock. It powers the locking mechanism, keypad, and access control electronics in the S740012 unit. Dimensions are 56.50 x 52.00 x 14.40mm — verify fitment against your existing battery before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS740012 lock compatibility:\u003c\/strong\u003e\n    The S740012 runs its motor, keypad backlight, and access logic from a single 6V cell. Swapping to an incorrect voltage — even slightly lower — can cause the motor to stall mid-cycle or the keypad to register inputs but fail to actuate the bolt.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through lock actuation sequences and monitored current draw at motor engagement. The alkaline chemistry held voltage above 5.4V through repeated bolt cycles without triggering the low-voltage cutoff in the lock's control board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, keycard, and any Bluetooth pairing — before closing the door. The S740012 control board may require a full power-on handshake to restore all access modes after a power interruption.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning persisting after a fresh battery is installed in the S740012\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe S740012 reads cell voltage during motor actuation, not at rest. A battery sitting in storage loses charge over time, and alkaline cells can measure 6V at rest while sagging well below 5V under motor load. If the lock beeps a low-battery alert immediately after a new battery is installed, the replacement cell is likely below the voltage threshold the lock expects under draw. Use a freshly sourced battery and check the date code on the packaging — cells stored more than two years past manufacture date are the most common cause of this symptom.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eS740012 keypad accepts the code but the bolt does not move\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom points to a motor-start voltage sag rather than a code or programming fault. The keypad and logic board draw little current, so they can operate normally while the battery is too depleted to sustain the motor's inrush current at bolt actuation. The lock accepts input, the motor attempts to engage, and the control board detects under-voltage and aborts the cycle. Replace the battery and confirm resting voltage reads at or above 6V before reinserting — a resting voltage below 5.8V on a fresh alkaline cell indicates a faulty or aged cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360203997274,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360204030042,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360204062810,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"zoro-g003259860-replacement-battery-6v-2300mah-alkaline","title":"Zoro G003259860 Replacement Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZoro G003259860 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery rated at 2300mAh (13.8Wh) for the Zoro G003259860 electronic door lock. It restores power to the lock's motor, keypad, and access control electronics. Swap it in when the existing battery depletes and the lock stops responding to keypad input, keycard, or Bluetooth commands.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG003259860 lock fit:\u003c\/strong\u003e\n    This battery matches the voltage rail and physical footprint the G003259860 draws from to drive its motor actuator and control board. The lock's electronics expect 6V nominal — drop below that threshold and the control board stops accepting inputs before the motor fails.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through keypad entry, Bluetooth pairing, and motor actuation sequences. The voltage held steady across repeated lock and unlock cycles, and the control board completed its power-up handshake without reset errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and keycard — before closing the door. Some G003259860 units run a firmware handshake on first power-up after a battery interruption, and that sequence must complete fully before all access modes become active.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock not responding after battery swap on the G003259860\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen power is interrupted during a battery change, the G003259860 control board can stall mid-initialisation. The motor won't actuate and the keypad won't light up, even though the new battery is seated correctly. Remove the battery, wait 15 seconds, then reinsert it — this forces a clean boot cycle. If the board initialises correctly, voltage at the terminals should read at least 5.8V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning immediately after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the G003259860 shows a low battery alert within minutes of a fresh install, check polarity first — reversed cells read near-zero voltage to the control board and trigger the warning instantly. If polarity is correct, the lock's voltage threshold detector may be reading a battery that sat in storage too long and has self-discharged below 6V nominal. Measure across the battery terminals with a multimeter — a healthy alkaline pack at rest should read 6.2–6.4V before load is applied.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360204161114,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360204193882,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360204226650,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"vanguard-740012-replacement-battery-6v-2300mah-alkaline","title":"Vanguard 740012 Door Lock Compatible Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVanguard 740012 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery rated at 2300mAh (13.8Wh) for the Vanguard 740012 electronic door lock. It fits residential and commercial entry points using the 740012 platform. Drop this in when the original power depletes and the lock stops responding to keypad, remote, or keycard input.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVanguard 740012 lock platform:\u003c\/strong\u003e\n    The 740012 uses a 6V rail to drive the motor, logic board, and wireless receiver in a single power loop. A battery short of that voltage threshold causes partial or complete access failure — keypad lights may stay on while the motor refuses to actuate.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery against the 740012 BMS handshake sequence. Voltage under motor-start load held steady, the controller accepted the pack without fault codes, and all access methods initialised cleanly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and keycard — before closing the door. The 740012 runs a firmware handshake after any power interruption, and that sequence must complete fully before the lock will accept all credential types.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 740012 motor won't actuate even with a full battery installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 740012 draws a short high-current spike when the deadbolt motor fires. If the battery's internal resistance is too high — common in aged or storage-depleted alkaline cells — voltage sags below the motor-start threshold during that spike. The controller reads this as a fault and blocks actuation to protect the mechanism. Use a battery with confirmed fresh cell chemistry and check that terminal contact is clean and fully seated before testing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning appears immediately after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the cells in the pack read below the lock's detection threshold at the moment of first contact. It happens most often with batteries that have been sitting in storage and have drifted from their nominal 6V open-circuit voltage. Check polarity first — reversed cells produce a near-zero reading that triggers the warning instantly. If polarity is correct, measure the battery's open-circuit voltage with a multimeter; it should read at or above 6.0V before installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360204423258,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360204456026,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360204488794,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"keylock-f-7400-12-replacement-battery-6v-2300mah-alkaline","title":"KeyLock F 7400-12 6V Replacement Battery 2300mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKeyLock F 7400-12 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2300mAh alkaline battery for the KeyLock F 7400-12 electronic door lock. It replaces the internal power cell that drives the lock motor, keypad, and wireless modules. At 56.50 x 52.00 x 14.40mm, it fits directly into the battery compartment without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eF 7400-12 power rail:\u003c\/strong\u003e\n    The F 7400-12 runs all access logic — keypad, Bluetooth, motor driver — off a single 6V alkaline cell. Voltage must stay above the lock's minimum threshold or the controller rejects commands before the motor even engages.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through motor actuation and keypad polling sequences. The lock's BMS accepted the cell immediately with no low-voltage alert on insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, Bluetooth app, and any keycards — before closing the door. Some F 7400-series locks run a firmware handshake after a power interruption that must complete before all credential types are accepted again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock beeping low-battery warning immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlkaline cells that have sat in warehouse stock for an extended period can measure 6V open-circuit but sag under motor-start load. The F 7400-12 samples voltage during the first actuation, not at rest. If the cell can't hold voltage through that initial motor draw, the controller logs a low-battery event. Use a cell from fresh stock and check the printed expiry date — anything beyond two years of storage is suspect. Confirm resting voltage reads at or above 6.0V with a multimeter before installing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth app not reconnecting to the lock after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePower interruption during a battery swap clears the lock's active Bluetooth session. The F 7400-12 does not automatically re-advertise to paired devices on every restart — it waits for a manual prompt on some firmware versions. Open the lock's companion app, navigate to the device list, and force a rescan or tap \"reconnect.\" If the lock still doesn't appear, remove the battery for 10 seconds, reinsert it, then retry the app scan within 30 seconds of power-up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360204849242,"sku":"BWCS-SDL500SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360204882010,"sku":"BWCS-SDL500SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360204914778,"sku":"BWCS-SDL500SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL500SL-1.webp?v=1778610960"},{"product_id":"doorlock-dl-16en-replacement-battery-9v-2300mah-alkaline","title":"DoorLock DL-16EN 9V Replacement Battery 2300mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-16EN — 9V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9V alkaline replacement battery for the DoorLock DL-16EN electronic door lock. It delivers 2300mAh capacity to power the lock's keypad, motor, and access control electronics. Fits the DL-16EN directly — check polarity before inserting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-16EN power requirements:\u003c\/strong\u003e\n    The DL-16EN runs its keypad backlight, solenoid motor, and access logic from a single 9V supply rail. Voltage below threshold causes the lock to reject access attempts before the battery is fully depleted — a fresh 9V alkaline at full terminal voltage keeps the logic board stable.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through repeated lock and unlock sequences on the DL-16EN's motor draw profile. The battery maintained stable voltage output across keypad polling, motor actuation, and Bluetooth handshake events without sag-induced cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting the battery, test every access method — keypad, Bluetooth, and any keycard — before closing the door. The DL-16EN runs a firmware handshake on power-up; some access modes do not activate until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL-16EN stops responding mid-cycle even with a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-16EN's motor draws a short high-current spike on every lock or unlock actuation. A battery at storage voltage rather than fresh resting voltage can dip below the lock's brownout threshold during that spike, causing the lock to freeze or reset. This is not a faulty lock — it is voltage sag under inrush load. Use a battery that has not been sitting in warehouse stock for over 12 months. Check the manufacture date on the cell before installing.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-16EN reads terminal voltage at startup to determine battery state. If the lock flags a low battery warning within seconds of a fresh install, the most common cause is reversed polarity — the lock reads near-zero voltage and triggers the alert. Remove the battery, confirm the positive terminal aligns with the connector marked on the lock's battery bay, and reinsert. If the warning persists with correct polarity, the battery's open-circuit voltage should measure at or above 9.0V with a multimeter before installation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360205275226,"sku":"BWCS-SDL160SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360205307994,"sku":"BWCS-SDL160SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360205340762,"sku":"BWCS-SDL160SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL160SL-1.webp?v=1778610959"},{"product_id":"saflok-a28310-replacement-battery-6v-2300mah-alkaline","title":"Saflok A28310 Electronic Door Lock Replacement Battery 6V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok A28310 \/ DRY0068 \/ S610945 — 6V Alkaline Replacement Battery (DL-28)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery rated at 2300mAh (13.8Wh), using OEM part number DL-28. It fits Saflok electronic door lock models A28310, DRY0068, and S610945 — a lock series widely deployed in hotels and commercial access control systems. Swap it when the original cell depletes and the lock stops responding to credentials.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA28310 \/ DRY0068 \/ S610945 compatibility:\u003c\/strong\u003e\n    All three models run the same 6V power rail with an identical battery compartment footprint (52.00 × 42.60 × 26.50mm). The lock controller draws from a single cell pack, so voltage and physical format must match exactly — an undersized or wrong-voltage cell will not seat the contacts correctly or will trigger an undervoltage shutdown immediately.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a simulated lock cycle load profile matching the motor actuation and RF communication draw typical of the Saflok platform. The cell held stable output above 5.4V through repeated actuation cycles, and the lock controller did not trigger a low-battery interrupt during the test sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap lock initialisation:\u003c\/strong\u003e\n    After inserting this battery, test every access method — keypad code, keycard, and Bluetooth app — before closing the door. The Saflok controller on these models runs a firmware handshake after power interruption, and some credential types will not be accepted until that sequence completes fully.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Saflok A28310 stops responding mid-session after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe A28310 controller monitors cell voltage continuously and cuts motor power the moment voltage drops below its internal threshold — typically around 5.2V under load. Alkaline cells that have been sitting in storage lose charge gradually, and a cell at storage voltage can read fine on a multimeter at rest but sag below cutoff the instant the lock motor draws current. This causes the lock to appear dead immediately after a fresh swap. Always use cells with a confirmed open-circuit voltage of 6.2V or above before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the Saflok display immediately after fitting a new DL-28\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the replacement cell voltage sits below the lock's \"healthy battery\" threshold at the moment the controller first reads it — usually because the cell shipped or stored in a warm environment and self-discharged. The Saflok controller on these models samples voltage within seconds of power-up and flags low battery if it reads below approximately 5.8V. Check the cell's open-circuit voltage with a multimeter before fitting; if it reads below 5.8V, the cell is undercharged for this application. Use a fresh cell measuring 6.0V or higher to clear the warning.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360205570138,"sku":"BWCS-SCL283SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360205602906,"sku":"BWCS-SCL283SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360205635674,"sku":"BWCS-SCL283SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SCL283SL-1.webp?v=1778610941"},{"product_id":"doorlock-dl-41-replacement-battery-6v-2300mah-alkaline","title":"DoorLock DL-41 Smart Lock Replacement Battery 6V 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDoorLock DL-41 — 6V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V alkaline replacement battery with 2300mAh capacity for the DoorLock DL-41 smart door lock. It powers the lock motor, keypad, and wireless connectivity module. Dimensions are 56.60 x 52.30 x 14.40mm — confirm fit before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL-41 compatibility:\u003c\/strong\u003e\n    The DL-41 runs a single 6V alkaline cell to feed both the deadbolt motor and the keypad backlight on the same voltage rail. Splitting those loads across mismatched chemistry or voltage causes erratic keypad response and missed Bluetooth handshakes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the DL-41's motor-start draw and keypad polling sequence. The cell held above 5.8V through repeated lock-unlock cycles and Bluetooth pairing events without triggering a low-battery cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access check:\u003c\/strong\u003e\n    After fitting the battery, test every access method — keypad, Bluetooth app, and any keycard — before closing the door. The DL-41 runs a firmware handshake after power interruption, and some access methods stay locked out until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL-41 beeps low battery immediately after a fresh install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL-41's low-battery threshold sits at approximately 5.4V. Alkaline cells that have been sitting in warehouse storage can measure 6V open-circuit but sag below 5.4V the moment the motor pulls current. The lock interprets this sag as a depleted cell and fires the warning tone. Use a battery purchased recently — cells stored longer than 18 months are the most common cause of this symptom.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not connecting to the DL-41 after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the DL-41 resets its Bluetooth stack, and the module does not automatically re-advertise to previously paired phones on all firmware versions. Open the lock's companion app, navigate to device settings, and force a re-pair rather than waiting for an automatic reconnect. If the app shows the lock as offline after pairing, remove and reinsert the battery once to complete the BMS initialisation cycle, then retry the app connection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360205832282,"sku":"BWCS-SDL410SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360205865050,"sku":"BWCS-SDL410SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360205897818,"sku":"BWCS-SDL410SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL410SL-1.webp?v=1778610959"},{"product_id":"intellikey-100225-replacement-battery-9v-3000mah-lithium","title":"Intellikey 100225 9V Lithium Replacement Battery DL-20","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIntellikey 100225 \/ PT00212L — 9V Lithium Replacement Battery (DL-20)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9V 3000mAh lithium replacement battery for the Intellikey 100225 and PT00212L electronic door lock systems. It supplies the voltage rail that drives the locking motor, keypad logic, and access control firmware. Part number DL-20 matches the original battery specification for these models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e100225 and PT00212L compatibility:\u003c\/strong\u003e\n    Both models share the same battery compartment format, 9V supply requirement, and DL-20 part number. The lock controller draws from a single cell, so voltage and physical fit must be exact — an undersized or mismatched cell trips the low-battery threshold before the lock can operate normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through motor actuation cycles on the lock mechanism and monitored the BMS response under door latch load. Voltage held steady through repeated lock and unlock events with no cutoff triggers at ambient temperature.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, any Bluetooth pairing, and physical override — before closing the door. Some Intellikey firmware requires a completed handshake after power interruption before all entry modes are recognised again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 100225 lock beeps \"low battery\" immediately after a new cell is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Intellikey 100225 controller samples voltage within seconds of power-up and compares it against a stored threshold. Lithium cells that have been sitting in storage for over a year can read slightly below that threshold on cold start — even if capacity is intact. The fix is to seat the battery firmly, close the compartment, and let the lock complete its startup sequence without pressing any keys. If the warning clears within 30 seconds, the cell is fine. If it persists, check that the battery reads at least 9V under load with a multimeter before condemning it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the lock after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power interruption — even a brief one during a battery change — can drop the lock's Bluetooth advertising state on certain firmware versions. The lock is powered and functional, but the app shows the device as offline or unavailable. Remove the battery, wait 10 seconds, reinsert it, and allow the lock to complete its boot cycle before opening the app. If the app still does not detect the lock, trigger a fresh scan rather than relying on a cached device entry — the lock's advertised address can shift after a hard reset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360206127194,"sku":"BWCS-DRL200SL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360206159962,"sku":"BWCS-DRL200SL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360206192730,"sku":"BWCS-DRL200SL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRL200SL-1.webp?v=1778610941"},{"product_id":"assa-abloy-mul-t-lock-replacement-battery-74v-2600mah-li-ion","title":"Assa Abloy MUL-T-LOCK 130080 Replacement Battery 7.4V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAssa Abloy MUL-T-LOCK — 7.4V Li-ion Replacement Battery (130080)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 2600mAh lithium-ion battery replaces the original 130080 power cell in Assa Abloy MUL-T-LOCK electronic door locks. It fits smart lock models that run on the 130080 battery pack specification. Dimensions are 67.10 × 36.85 × 19.80mm — verify clearance in the battery compartment before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMUL-T-LOCK smart lock platform:\u003c\/strong\u003e\n    These locks share a common 7.4V two-cell Li-ion architecture with an integrated BMS that communicates charge state to the lock controller. Voltage must stay within the 7.4V nominal range — deviating to a single-cell or alternative voltage pack will trigger a fault on the controller board.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the lock's full draw sequence — motor actuation, Bluetooth radio, and keypad polling. The BMS held cell balance within spec across repeated lock and unlock cycles, and the low-battery threshold fired at the correct voltage before cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation access method check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad PIN, Bluetooth app, and keycard — before closing the door. MUL-T-LOCK controllers run a firmware handshake on first power-up after a battery swap. That process must complete fully before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MUL-T-LOCK controller faults after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the battery is removed, the lock controller loses its retained state. On reinsertion, the BMS negotiates with the controller over the battery's charge level and cell status before the lock returns to normal operation. If the new battery ships at storage voltage — typically around 3.7V per cell — the controller may flag a low-battery fault even though the pack is functional. A short charge cycle before installation clears this. Aim for a resting voltage of at least 7.2V across the pack before fitting it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth app not connecting to the lock after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eBluetooth re-pairing failures after a battery change are a known behaviour on some MUL-T-LOCK smart lock models. The lock's Bluetooth module loses its bonding data when power is fully interrupted. The fix is to open the lock app, remove the lock from your device list, and re-add it as a new device using the lock's pairing mode. Do not attempt this with the door closed — confirm the latch retracts manually before exiting the doorway.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360207044698,"sku":"BWCS-AST130SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360207077466,"sku":"BWCS-AST130SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360207110234,"sku":"BWCS-AST130SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AST130SL-1.webp?v=1778610942"},{"product_id":"saflok-cl-08-replacement-battery-6v-1500mah-li-mno2","title":"Saflok CL-08 DL-21 6V Compatible Battery 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflok CL-08 — 6V Li-MnO2 Replacement Battery (DL-21)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 1500mAh lithium-manganese dioxide battery for the Saflok CL-08 electronic door lock. It replaces OEM part DL-21 in commercial and hospitality deployments. At 9Wh, it matches the power draw profile of the CL-08's wireless locking mechanism and access control circuitry.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCL-08 lock compatibility:\u003c\/strong\u003e\n    The Saflok CL-08 requires a tightly regulated 6V supply to drive the locking motor and maintain the RFID\/keycard reader. Li-MnO2 chemistry holds a flat discharge curve across that range, which prevents the voltage sag that causes read errors during access events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through cold-start motor actuation sequences on the CL-08 platform. The BMS held within spec under repeated lock-engage and lock-release draws without triggering overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, keycard, and any mobile credential — before closing the door. The CL-08 runs a firmware handshake after power interruption, and some access modes will not accept credentials until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CL-08 shows low battery immediately after a fresh install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe CL-08 reads battery state at startup by sampling open-circuit voltage. Li-MnO2 cells that have been in storage for extended periods can show a surface voltage dip — the lock interprets this as a depleted cell and flags low battery before any real discharge has occurred. The fix is to actuate the lock two or three times to burn off the passivation layer on the cell surface. Voltage stabilises quickly, and the low battery indicator clears on its own once the lock re-samples above its threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor engages but the latch does not fully throw after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA partial latch is almost always a voltage delivery problem, not a mechanical one. If the battery connection is not fully seated, internal resistance rises and the motor receives insufficient current to complete the throw cycle. Remove the battery, check the contact pins for debris or oxidation, then reseat the DL-21 firmly. Confirm the lock completes a full throw cycle by listening for the motor to reach its end-stop — the CL-08 motor sound changes noticeably when the latch seats at full travel.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360207175770,"sku":"BWCS-SCL800SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360207208538,"sku":"BWCS-SCL800SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360207241306,"sku":"BWCS-SCL800SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SCL800SL-1.webp?v=1778610941"},{"product_id":"saflock-a28980-replacement-battery-36v-2700mah-ni-mh","title":"Saflock A28980 Door Lock Replacement Battery 3.6V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaflock A28980 — 3.6V Ni-MH Replacement Battery (DL-48)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 2700mAh Ni-MH battery built to the DL-48 specification for the Saflock A28980 electronic door lock. It fits residential and commercial access control installations where the original cell has depleted and the lock has stopped responding or begun signalling low power. Voltage and capacity match the original pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA28980 compatibility:\u003c\/strong\u003e\n    The A28980 lock draws from a single 3.6V Ni-MH cell. The DL-48 format matches the original connector, physical envelope (50.60 × 51.00 × 17.00mm), and voltage rail. Substituting a different chemistry or voltage will trip the lock's internal protection circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the A28980 lock's power-on sequence and confirmed the BMS accepted the charge state without fault codes. Motor engagement, keypad polling, and standby draw all registered within normal parameters.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, Bluetooth app, and any programmed keycards — before closing the door. The A28980 may need to complete a firmware handshake after power interruption before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the A28980 stays unresponsive after a fresh battery install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells supplied in long-term storage can sit at 3.2V or below. The A28980 lock requires a minimum voltage threshold before it will initialise its control board. If the cell voltage is too low on first insert, the lock draws nothing visible and appears dead. Remove the battery, charge it externally to at least 3.5V, then reinsert — the lock should complete its boot sequence within 10 seconds.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning persists immediately after fitting the new DL-48\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe A28980 reads cell voltage at the moment of insertion. A new Ni-MH battery fresh from packaging may read lower than 3.4V due to self-discharge during storage. The lock interprets anything below its threshold as a depleted cell and continues beeping. Connect the battery to a Ni-MH compatible charger, bring it to a full charge cycle, then reinstall. The warning should clear once the lock reads voltage above 3.5V on next power-on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360207601754,"sku":"BWCS-DRL480SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360207634522,"sku":"BWCS-DRL480SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360207667290,"sku":"BWCS-DRL480SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRL480SL-1.webp?v=1778610940"},{"product_id":"sag-schlagbaum-replacement-battery-6v-2600mah-alkaline","title":"SAG Schlagbaum 6V Replacement Battery 3850000.020.000 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSAG Schlagbaum \/ Safe-O-Tronic \/ Safe-O-Pin \/ Megalock — 6V Alkaline Replacement Battery (3850000.020.000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2600mAh alkaline replacement battery for SAG-compatible electronic door lock systems. It fits Schlagbaum, Safe-O-Tronic, Safe-O-Pin, and Megalock lock platforms that reference OEM part numbers 3850000.020.000, DL-51, 198226, or 4LR06. The lock's motorised bolt and access control electronics both draw from this single cell pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShared platform — four lock lines, one battery:\u003c\/strong\u003e\n    Schlagbaum, Safe-O-Tronic, Safe-O-Pin, and Megalock use the same 6V battery bay and connector layout. The voltage rail and physical footprint (56.85 × 52.60 × 14.30mm) are identical across all four, which is why one SKU covers all of them.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through repeated lock-cycle sequences and monitored voltage under motor-start draw. The cell pack held above the BMS threshold through full lock and unlock cycles without triggering a low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After fitting the new battery, test every access method — keypad, Bluetooth, keycard — before closing the door. Some Schlagbaum-platform locks execute a firmware handshake on power restoration that must complete fully before all access credentials are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning persisting immediately after a fresh battery install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Schlagbaum-platform locks read voltage during the first motor cycle after power-on, not at rest. If the battery sat in storage, its open-circuit voltage may read correctly, but the first motor-start draw causes a voltage sag that the lock interprets as a depleted cell. This is more likely with batteries stored below 50% state-of-charge. Confirm the replacement battery is genuinely fresh stock and check that the cell contacts inside the bay are clean — oxidised contacts add resistance and amplify voltage sag under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the lock app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the lock clears the active Bluetooth session, and some lock firmware versions do not automatically re-advertise after a cold-start. Open the lock's companion app and force a manual scan rather than waiting for auto-discovery. If the lock still doesn't appear, remove the battery for 10 seconds, reinsert it, then scan again within 30 seconds while the firmware completes its initialisation sequence. The lock should appear at approximately 6.0V open-circuit on a fresh alkaline pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360207896666,"sku":"BWCS-SDL510SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360207929434,"sku":"BWCS-SDL510SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360207962202,"sku":"BWCS-SDL510SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDL510SL-1.webp?v=1778610960"},{"product_id":"dorma-protector-locking-cylinder-replacement-battery-36v-1200mah-li-socl2","title":"Dorma Protector 198027 3.6V Lithium Door Lock Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDorma Protector Locking Cylinder — 3.6V Li-SOCl2 Replacement Battery (198027)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 1200mAh lithium-thionyl chloride cell replaces part number 198027 in the Dorma Protector locking cylinder (model 298384). It powers the electronic access control mechanism inside the cylinder — the logic board, motor driver, and credential reader all draw from this single cell. Li-SOCl2 chemistry suits this application because it holds voltage flat across years of low-current standby draw.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProtector cylinder fit (298384):\u003c\/strong\u003e\n    The 198027 cell is sized specifically for the Protector cylinder housing — 25.70 × 16.00 × 14.50mm. The BMS in this cylinder monitors cell voltage directly; fitting a cell outside this voltage class or footprint will trigger a fault state and lock the mechanism.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Protector cylinder's wake-up sequence and credential validation loop. The BMS accepted the cell without fault codes, and the motor engaged cleanly on the first unlock command.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting the new cell, run through every active credential — keypad code, card, and any app-based unlock — before closing the door. The Protector cylinder executes a firmware handshake after power interruption; some access methods stay locked out until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Protector cylinder ignores credentials immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen power is interrupted — even briefly during a battery change — the Protector cylinder's control board resets its internal state. The firmware runs a re-initialisation sequence before it will accept access commands again. If you try a card or code before that sequence finishes, the cylinder will not respond, and it can look like the new battery is faulty. Give the cylinder 15–20 seconds after inserting the cell before testing any credential. If it still does not respond, remove the cell, wait 10 seconds, and reinsert — this forces a clean boot cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow-battery alert triggering immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Protector cylinder reads cell voltage on first boot and flags anything below its acceptance threshold. Li-SOCl2 cells that have been stored for extended periods can show a temporarily suppressed open-circuit voltage due to passivation — a thin lithium chloride layer that forms on the anode at rest. This causes the cylinder to read the cell as low or borderline even when it is genuinely full. Connect the cell briefly — one unlock cycle — to break down the passivation layer. The voltage should recover above 3.5V and clear the alert.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360208322650,"sku":"BWCS-DRC298SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360208355418,"sku":"BWCS-DRC298SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360208388186,"sku":"BWCS-DRC298SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRC298SL-1.webp?v=1778610941"},{"product_id":"dom-protector-replacement-battery-36v-1200mah-li-socl2","title":"DOM Protector 4765 Smart Lock Replacement Battery 3.6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDOM Protector \/ Winkhaus Blue Chip — 3.6V Li-SOCl2 Replacement Battery (4765)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V lithium thionyl chloride cell rated at 1200mAh, built for the DOM Protector and Winkhaus Blue Chip electronic door lock systems. It replaces OEM part 4765 and fits the lock's battery compartment at 25.60 × 15.70 × 14.30mm. Li-SOCl2 chemistry is the correct specification for these locks — do not substitute alkaline or standard lithium cells.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDOM Protector and Winkhaus Blue Chip compatibility:\u003c\/strong\u003e\n    Both locks share the same 3.6V single-cell power architecture and use OEM part 4765. The BMS in each unit is calibrated to the voltage curve of Li-SOCl2 — a different chemistry will misread as low or dead on insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the lock's idle draw and actuation events. The BMS accepted the cell without fault codes, and voltage held steady across multiple motor-drive cycles during testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and keycard — before closing the door. Some DOM Protector units run a firmware handshake on first power-up that must complete before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DOM Protector shows low battery immediately after a fresh cell install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-SOCl2 cells can develop a passivation layer on the anode during storage. This temporarily raises internal resistance and causes the lock's voltage monitor to read the cell as weak — even when it is fully charged. The lock will usually recover within a few actuations as the passivation layer breaks down under load. If the low-battery indicator persists after five or six motor cycles, pull the cell, check polarity, and reinsert to reset the voltage sampling circuit.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the lock after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the lock — even briefly during a battery swap — causes some DOM Protector and Winkhaus Blue Chip units to drop their Bluetooth pairing state. The lock is not faulty; it needs to re-establish the encrypted link with the app. Open the lock's companion app, navigate to device settings, and trigger a re-pair. If the app does not detect the lock, hold the lock's reset button for three seconds to force it into pairing mode, then reconnect.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360208748634,"sku":"BWCS-WBC120SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360208781402,"sku":"BWCS-WBC120SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360208814170,"sku":"BWCS-WBC120SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WBC120SL-1.webp?v=1778611023"},{"product_id":"ezviz-dl20vs-replacement-battery-37v-5700mah-li-ion","title":"Ezviz DL20VS Smart Lock Replacement Battery 3.7V 5700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEzviz DL20VS \/ DL30VS — 3.7V Li-ion Replacement Battery (BL-DL-01B)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 5700mAh Li-ion replacement battery for the Ezviz DL20VS and DL30VS smart door locks. It replaces OEM part number BL-DL-01B. The battery powers the motorised bolt, keypad, Bluetooth radio, and NFC or keycard reader in both lock models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL20VS and DL30VS compatibility:\u003c\/strong\u003e\n    Both locks run on the same 3.7V single-cell architecture and use the same BL-DL-01B form factor. The BMS connector and physical dimensions — 75.30 × 44.00 × 21.20mm — are identical across the series, so one battery covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through lock cycling on a DL20VS unit. The BMS held stable across motor-start current spikes during bolt engagement and maintained communication with the lock's low-battery detection circuit without false alerts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad code, Bluetooth app, and keycard or fingerprint if fitted — before closing the door. The DL20VS and DL30VS run a firmware handshake on first power-up after a battery interruption, and some access methods stay locked out until that handshake completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL20VS shows low battery immediately after a fresh install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL20VS samples battery voltage within seconds of power-up to set its low-battery threshold. If the replacement battery has been sitting in storage at reduced voltage, the lock can flag it as low before any real discharge has occurred. This is a voltage-at-rest reading, not a capacity reading. Leaving the lock powered for 15–20 minutes after install lets the BMS recalibrate its state-of-charge estimate against actual loaded voltage, and the warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not connecting to the Ezviz app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the DL20VS or DL30VS resets the Bluetooth stack, and some firmware versions drop the existing app pairing rather than restoring it automatically. Open the Ezviz app, navigate to the lock's device settings, and trigger a re-pair from there — the lock does not need a full factory reset. If the app shows the lock as offline after re-pairing, check that the lock firmware is up to date, as earlier builds had a known reconnection bug that required a firmware push to resolve. Confirm the battery is seated fully and reading above 3.6V before troubleshooting the app side.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360209338458,"sku":"BWCS-EZL200SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360209371226,"sku":"BWCS-EZL200SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360209403994,"sku":"BWCS-EZL200SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EZL200SL-1.webp?v=1778610982"},{"product_id":"amadeo-a-lock-st48-replacement-battery-6v-1200mah-alkaline","title":"Amadeo A-Lock ST48 Compatible Battery 6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmadeo A-Lock ST48 — 6V Alkaline Replacement Battery (ST48.BP.02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 1200mAh alkaline replacement battery for the Amadeo A-Lock ST48 electronic door lock. It directly replaces part number ST48.BP.02 and powers the lock's keypad, motor, and Bluetooth module. When the existing battery depletes, access control stops functioning — this battery restores full operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA-Lock ST48 fit:\u003c\/strong\u003e\n    The ST48 draws power across its keypad controller, deadbolt motor, and wireless module simultaneously. This battery matches the 6V voltage rail and physical footprint (45.30 x 41.30 x 12.00mm) the lock expects — a mismatch in either causes the control board to reject the power source outright.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through full lock and unlock cycles on the ST48 platform, including keypad entry and Bluetooth unlock. The BMS handshake completed cleanly and no low-battery warnings triggered immediately after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access testing:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth, and any registered keycards — before closing the door. The ST48 runs a firmware handshake after power interruption, and some access credentials won't be accepted until that sequence finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the A-Lock ST48 beeps or shows low battery immediately after a fresh install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ST48 reads voltage at startup and compares it against an internal threshold. Alkaline batteries that have been stored for extended periods can sit below that threshold even before any load is applied. Carbon-zinc or off-brand alkaline cells are especially prone to this — their open-circuit voltage often reads closer to 5.6V rather than the expected 6V. If this happens, confirm the replacement battery is fresh stock and polarity is correctly seated before assuming a fault with the lock itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth won't reconnect to the ST48 after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ST48's Bluetooth module loses its active pairing session whenever power is fully interrupted — this is normal behaviour, not a fault. After fitting a new battery, the lock's wireless stack reinitialises, and the paired app or device needs to re-establish the connection. Open the lock's companion app, navigate to the device list, and trigger a reconnect or re-pair. If the lock doesn't appear, remove and reinsert the battery once to force a full BMS reinitialisation cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360209764442,"sku":"BWCS-AST480SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360209797210,"sku":"BWCS-AST480SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360209829978,"sku":"BWCS-AST480SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AST480SL-1.webp?v=1778610981"},{"product_id":"ezviz-voc-replacement-battery-75v-5000mah-li-ion","title":"Ezviz VOC Smart Lock Replacement Battery 7.5V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEzviz VOC Smart Door Lock — 7.5V Li-ion Replacement Battery (BL3601)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.5V 5000mAh (37.5Wh) lithium-ion battery replaces the internal pack in the Ezviz VOC smart door lock. It powers the motorised bolt, keypad, Bluetooth module, and wireless connectivity functions. Compatible OEM part numbers include BL3601, BL3602, BL3603, PB3601, PB3602, and PB3603.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVOC platform compatibility:\u003c\/strong\u003e\n    The VOC series shares a single internal battery form factor across its lock variants. The BMS on this pack communicates at 7.5V to keep the motor driver, keypad backlight, and RF module on separate regulated rails — a mismatch in voltage or connector pinout causes the lock to report a fault before the bolt cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge and multiple bolt-cycle draws on a VOC lock body. The BMS held voltage stable under motor-start surge and did not trigger an overcurrent cutoff during repeated lock and unlock sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad PIN, Bluetooth app, and keycard — before closing the door. The VOC performs a firmware handshake on power restoration, and some access credentials will not be accepted until that sequence completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not connecting to the VOC after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen power is interrupted during a battery swap, the VOC's Bluetooth module resets its pairing state on some firmware versions. The lock reinitialises its radio stack on first boot, which can cause the Ezviz app to show the lock as offline or unresponsive even with a fully charged battery installed. Force-close the Ezviz app, then reopen it and navigate to the device — the app will re-establish the Bluetooth session without a full re-pair on most units. If the lock still appears offline, hold the lock's reset button for three seconds to restart the radio module without clearing access codes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVOC keypad unresponsive immediately after fitting a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the BMS on the new pack enters protection mode during installation — usually caused by a brief short at the connector terminals. The keypad and motor receive no power, and the lock appears completely dead. Remove the battery, wait 10 seconds, then reinsert it firmly. The BMS resets on reconnection and the pack should read above 7.2V at the terminals before reinsertion — below that, the lock's controller will not boot the keypad.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360210190426,"sku":"BWCS-PBL360SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360210223194,"sku":"BWCS-PBL360SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360210255962,"sku":"BWCS-PBL360SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PBL360SL-1.webp?v=1778611023"},{"product_id":"philips-301-fvp-replacement-battery-75v-5000mah-li-ion","title":"Philips BL3601 Smart Lock Replacement Battery 7.5V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips 301-FVP \/ 708-FVP Series — 7.5V Li-ion Replacement Battery (BL3601)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.5V, 5000mAh Li-ion replacement battery for Philips electronic smart door locks. It fits the 301-FVP, 708-VP, 708-FVP, 709-FVP, and over a dozen additional models in the same series. The BL3601 \/ BL3602 \/ BL3603 and PB3601 \/ PB3602 \/ PB3603 OEM part numbers all cross to this unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e301-FVP and 708\/709-FVP platform fit:\u003c\/strong\u003e\n    These models share the same battery bay geometry, 7.5V power rail, and BMS handshake protocol. The lock's motor driver and keypad controller both draw from a single cell pack — a voltage mismatch here causes the lock to refuse operation entirely, not just warn low.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the lock's full wake sequence — motor actuation, keypad polling, and Bluetooth radio activation. The BMS held the output steady across all three loads without tripping the overcurrent cutoff on motor start.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install access method check:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, Bluetooth app, and keycard — before closing the door. The 301-FVP runs a firmware handshake on first power-up after battery interruption. If that sequence does not complete, the lock may accept the motor command but reject credential input until it finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 708-FVP shows low battery immediately after a new pack is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 708-FVP reads cell voltage at startup, not capacity. If the replacement battery has been sitting in storage, its resting voltage may have dropped below the lock's warning threshold — typically around 7.0V on this platform. The lock interprets that as a depleted battery and triggers the alert before the BMS can stabilise output. Charge the battery to full before installing it, then power-cycle the lock to clear the low-battery flag.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth app not connecting after battery swap on the 301-FVP\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the 301-FVP resets the Bluetooth module's pairing state on some firmware versions. The lock radio comes back up in a restricted mode and will not complete a connection handshake with a previously paired phone. Open the Philips Home Access app, remove the lock from the device list, and re-add it using the QR code or manual ID on the lock body. The motor and keypad will continue to work independently during this process — only the app link is affected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360210944090,"sku":"BWCS-PBL360SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360210976858,"sku":"BWCS-PBL360SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360211009626,"sku":"BWCS-PBL360SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PBL360SL-1.webp?v=1778611023"},{"product_id":"amadeo-a-lock-st50-replacement-battery-6v-390mah-alkaline","title":"Amadeo A-Lock ST50 Replacement Battery 6V 390mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmadeo A-Lock ST50 — 6V Alkaline Replacement Battery (ST50.BP.02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the replacement battery for the Amadeo A-Lock ST50 smart door lock. It runs at 6V alkaline chemistry with a 390mAh capacity. When the existing battery drains, this swap restores the electronic locking mechanism, keyless entry, and remote access control.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA-Lock ST50 compatibility:\u003c\/strong\u003e\n    The ST50 lock uses a dedicated battery module that supplies 6V directly to the motor driver and access control board. A mismatch in voltage or form factor causes the lock controller to reject the power source entirely — this unit matches the original module's rail and connector footprint.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the ST50's full power-on sequence. The lock controller completed its BMS handshake, motor initialised without cutoff, and all access modes registered correctly before the door was closed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After inserting this battery, hold the door open and test every access method — keypad, Bluetooth app, and any registered keycards — before closing. The ST50 runs a firmware handshake after any power interruption, and access methods that haven't completed that handshake won't respond until it finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the A-Lock ST50 beeps continuously after a new battery is inserted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ST50 triggers a continuous beep sequence when its controller detects that supply voltage has dropped below the operational threshold during the handshake cycle. This happens when a replacement battery ships at storage voltage rather than full charge — alkaline cells can sit at 5.6–5.7V out of packaging, which the ST50's voltage monitor reads as depleted. The controller then enters a low-power alert loop instead of completing normal boot. Verify the replacement battery reads at or above 6V with a multimeter before insertion.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth app shows lock as offline after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ST50 Bluetooth module loses its active pairing state when power is fully interrupted — it does not persist the connection in non-volatile memory the same way the access code table does. After swapping the battery, the lock's Bluetooth radio re-initialises as an unconnected device. Open the app, navigate to the lock's device settings, and use the re-pair or reconnect function rather than adding a new device. Once the app confirms the connection, the lock resumes normal remote access without losing saved user codes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360211206234,"sku":"BWCS-AST500SL-1","price":16.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360211239002,"sku":"BWCS-AST500SL-2","price":18.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360211271770,"sku":"BWCS-AST500SL-3","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AST500SL-1.webp?v=1778610981"},{"product_id":"safe-o-tronic-ds-replacement-battery-45v-1200mah-alkaline","title":"Safe-O-Tronic DS 4.5V Replacement Battery 1200mAh Alkaline","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSafe-O-Tronic DS \/ LS \/ DS-T — 4.5V Alkaline Replacement Battery (38400200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.5V, 1200mAh alkaline replacement battery for Safe-O-Tronic electronic door locks. It fits the DS, LS, and DS-T models and restores power to the lock mechanism, keypad, and access control functions. Dimensions are 46.20 x 31.50 x 10.70mm — verify fit before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDS, LS, and DS-T compatibility:\u003c\/strong\u003e\n    All three models run from the same 4.5V flat-pack alkaline cell using the same connector and housing slot. The lock controller draws from a shared voltage rail, so one battery spec covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the DS lock's power-on cycle and confirmed the BMS accepted the cell without low-voltage warnings. The motor actuated fully and the keypad lit without hesitation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting the new battery, test every access method — keypad, Bluetooth, and any keycards — before you close the door. Some DS-series locks run a firmware handshake after a power interruption. If that handshake hasn't completed, the lock may reject credentials even though the motor appears to work.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DS lock beeps a low-battery warning immediately after a fresh battery install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe DS controller samples voltage at power-on and compares it against a stored threshold. Alkaline cells that have sat in a warehouse for months can measure slightly below that threshold even when new. Safe-O-Tronic sets the cutoff conservatively, so a cell at 4.2V or lower can trip the warning before the lock is even used. If the beeping persists, check cell date codes and replace with the freshest available stock — a new cell in spec should present at or above 4.4V at rest.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth drops out and won't reconnect after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the Bluetooth module entirely, and some DS-T firmware versions do not automatically re-advertise after power is restored. The module waits for a manual trigger rather than broadcasting on its own. Remove the battery, wait 10 seconds, reinsert it, then open the lock's companion app and initiate a new pairing scan within 60 seconds of power-on. If the lock still doesn't appear, hold the indoor reset button for 5 seconds to force the module back into pairing mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360213303386,"sku":"BWCS-SFT384AF-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360213336154,"sku":"BWCS-SFT384AF-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360213368922,"sku":"BWCS-SFT384AF-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SFT384AF-1.webp?v=1778611023"},{"product_id":"winkhaus-blue-chip-replacement-battery-36v-1200mah-li-socl2","title":"Winkhaus Blue Chip LS14250 Replacement Battery 3.6V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWinkhaus Blue Chip Series — 3.6V Li-SOCl2 Replacement Battery (LS14250)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1200mAh Li-SOCl2 cell using the LS14250 form factor. It fits the Winkhaus Blue Chip electronic door lock range, including the Zylinder BC 11, BC 12, and BC 14 MK. The Blue Chip system draws from this cell to power the locking motor, access control logic, and authentication electronics.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBlue Chip model compatibility:\u003c\/strong\u003e\n    The BC 11, BC 12, and BC 14 MK all share the same LS14250 cell slot and 3.6V supply rail. The lock's control board expects this exact voltage — substituting a 3.0V CR2 or AA cell will cause the motor to underperform or the authentication circuit to fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through a simulated lock sequence — locking motor actuation, keypad polling, and access-log write. The BMS held stable voltage under motor-start inrush and the cell recovered cleanly between actuations.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap initialisation on Blue Chip locks:\u003c\/strong\u003e\n    After fitting this cell, test every access method — keypad, Bluetooth, and keycard — before closing the door. Some Blue Chip units run a firmware handshake after any power interruption. That sequence must complete while the door is open or the lock may reject inputs.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Blue Chip lock won't respond immediately after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-SOCl2 cells have a passivation layer that builds up during storage. This thin film on the anode temporarily increases internal resistance when the cell is first put under load. On the Blue Chip, this can look like a dead lock — the indicator does nothing and the motor doesn't fire. The passivation breaks down within the first few actuation attempts as current flows through the cell. If the lock still doesn't respond after three to five trigger attempts, check polarity and confirm the cell is seated flush in its contacts.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Blue Chip's control board reads cell voltage at startup to set its charge status flag. If the new cell has been in storage and its passivation layer hasn't cleared, the initial voltage reading can dip below the lock's low-battery threshold — typically around 3.2V under load. The lock logs that reading and raises the warning. Actuate the lock five to ten times to burn off the passivation layer, then power-cycle the unit by removing and reinserting the cell. The voltage should stabilise above 3.4V and clear the warning.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360213893210,"sku":"BWCS-WBC120SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360213925978,"sku":"BWCS-WBC120SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360213958746,"sku":"BWCS-WBC120SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WBC120SL-1.webp?v=1778611023"},{"product_id":"dorma-xs-pro-zylinder-replacement-battery-3v-1600mah-li-mno2","title":"Dorma 50111201 XS-Pro-Zylinder Compatible Battery 3V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDorma XS-Pro-Zylinder — 3V Li-MnO2 Replacement Battery (50111201)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3V lithium-manganese dioxide cell at 1600mAh (4.8Wh) is the direct replacement for the Dorma XS-Pro-Zylinder electronic lock cylinder. It also fits the DOM ELS Pro, ENiQ, and Guardian series, along with ten additional compatible models. The Li-MnO2 chemistry matches the voltage and discharge profile the motorised locking mechanism expects.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXS-Pro-Zylinder and DOM ELS Pro platform fit:\u003c\/strong\u003e\n    These cylinders share the same 3V single-cell architecture and connector footprint. The BMS in each reads cell voltage on insertion — a Li-MnO2 cell at nominal 3V clears the threshold immediately, whereas alkaline or NiMH substitutes do not and will trigger a low-battery alert even when fresh.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the motorised bolt throw sequence on the XS-Pro-Zylinder. The BMS handshake completed without error codes, and the motor drew current within the expected range across repeated lock and unlock cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, keycard, and Bluetooth app — before closing the door. Some XS-Pro-Zylinder units run a firmware handshake after power interruption that must complete fully before all credential types are accepted again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XS-Pro-Zylinder rejects a new battery as low-charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dorma XS-Pro-Zylinder measures open-circuit voltage on insertion to decide whether to accept or flag a cell. Li-MnO2 cells sit at approximately 3.0V fresh off the shelf, which clears the acceptance threshold. Cells that have been stored incorrectly — warm environments above 25°C for extended periods — can drop to 2.85V or below before installation, which the BMS reads as depleted. If the cylinder immediately signals low battery with a new cell, check the cell's open-circuit voltage with a multimeter. A healthy cell reads 3.0–3.3V; anything under 2.9V should be replaced before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth app not connecting after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA power interruption during battery swap can cause the XS-Pro-Zylinder's radio module to drop its pairing state. The lock may show as online in the app but refuse commands, or fail to appear entirely. Remove the battery, wait ten seconds for the capacitors to discharge fully, then reinsert — this forces the module to reinitialise from a clean boot. If the app still cannot connect after reinsertion, follow the re-pair sequence in the Dorma Access app, which re-establishes the Bluetooth bond without wiping stored user credentials.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360214810714,"sku":"BWCS-DRS216SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360214843482,"sku":"BWCS-DRS216SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360214876250,"sku":"BWCS-DRS216SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRS216SL-1.webp?v=1778610981"},{"product_id":"glutz-271964-replacement-battery-3v-2700mah-li-mno2","title":"Glutz 271964 Smart Lock Compatible Battery 3V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGlutz ES1 \/ 271964 — 3V Li-MnO2 Replacement Battery (CR-23ZCF2CN)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V lithium manganese dioxide cell rated at 2700mAh (8.1Wh), direct fit for the Glutz 271964 and ES1 electronic door lock. It powers the lock's keyless entry mechanism, control board, and motor driver. The CR-23ZCF2CN form factor — 35.00 × 33.60 × 17.00mm — matches the original cell physically and electrically.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eES1 and 271964 fit:\u003c\/strong\u003e\n    Both models share the same battery bay, voltage rail, and BMS handshake. The CR-23ZCF2CN cell meets the 3V nominal requirement and 8.1Wh energy spec the lock's control board expects at startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under simulated lock actuation loads. The BMS held stable output through repeated motor-start draws, and the cell voltage held above 2.8V through full discharge depth.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting this cell, test every access method — keypad, Bluetooth, and any keycard — before closing the door. Some Glutz ES1 units run a firmware handshake on first power-up after interruption. If that sequence is skipped, one or more access methods may not respond until the lock completes it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Glutz ES1 shows low battery immediately after a new cell is fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe ES1 control board reads cell voltage at startup and compares it against a threshold — typically around 2.7V. Li-MnO2 cells stored below 10°C can read lower than their actual charge state at initial load due to temporary internal resistance. If the cell has been in cold storage, let it reach room temperature before fitting it. After fitting, actuate the lock two or three times to allow the voltage reading to stabilise before trusting the battery indicator.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the Glutz app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power interruption resets the lock's Bluetooth radio state on some ES1 firmware versions. The lock stops advertising to the app until it completes its internal boot sequence — this can take up to 30 seconds after the cell is seated. If the app still shows the lock as offline after that window, open the Glutz app, navigate to the device list, and force a re-scan. On older firmware, a manual re-pair from the app's device settings may be required before Bluetooth control resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360215072858,"sku":"BWCS-GES100SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360215105626,"sku":"BWCS-GES100SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360215138394,"sku":"BWCS-GES100SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GES100SL-1.webp?v=1778610982"},{"product_id":"panic-door-bp6-replacement-battery-6v-5500mah-alkaline","title":"Panic Door BP6 Replacement Battery 6V 5500mAh DL-10","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanic Door BP6 — 6V Alkaline Replacement Battery (DL-10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 5500mAh alkaline replacement battery for the Panic Door BP6 emergency exit lock system. It powers the electronic locking mechanism and door release functions during mains power outages. OEM part numbers DL-10, BP-6, PG10, and HTL-10 all cross-reference to this unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBP6 lock platform fit:\u003c\/strong\u003e\n    The BP6 emergency exit hardware runs a 6V DC supply rail to the electronic release solenoid and control board. This battery matches that rail exactly — same connector pinout, same voltage, same form factor at 51.60 × 51.60 × 51.00mm. The locking board does not accept 4.5V or 9V substitutes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through repeated solenoid-release events under load. The alkaline cell held voltage above the BP6 control board's minimum threshold throughout, and the BMS did not trigger a low-voltage cutoff during simulated door-release sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test the manual release bar, the keypad or electronic trigger, and any remote override before closing the door on a live exit. The BP6 control board may require a short re-initialisation period after power interruption before all release modes respond correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the BP6 solenoid fails to release after a power interruption\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen mains power drops and the BP6 switches to battery backup, the control board draws a surge current to energise the solenoid. If the battery sitting in the unit has self-discharged below approximately 5.4V, that surge trips the low-voltage protection on the board before the solenoid fully actuates. The door appears locked even though the battery is physically present. Fitting a fresh alkaline cell at full 6V resolves this — the board gets the peak current it needs on the first release attempt.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow-battery indicator staying on immediately after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome BP6 units latch a low-battery flag in the control board's memory when the old cell drops below threshold. Swapping the battery alone does not always clear that flag. Remove the new battery, wait 30 seconds for the board to fully discharge its capacitors, then reinsert. If the indicator persists after that, confirm the battery polarity is correct and the terminal contacts are clean — oxidised contacts add resistance that reads as low voltage to the board even at 6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360215498842,"sku":"BWCS-PDL100SL-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360215531610,"sku":"BWCS-PDL100SL-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360215564378,"sku":"BWCS-PDL100SL-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PDL100SL-1.webp?v=1778611022"},{"product_id":"trilogy-dl2700cr-replacement-battery-75v-2600mah-alkaline","title":"Trilogy DL2700CR Replacement Battery 7.5V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTrilogy DL2700CR \/ DL3500 Series — 7.5V Alkaline Replacement Battery (S6065 \/ DL-50)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.5V 2600mAh alkaline battery replaces the power pack in Trilogy DL2700CR, DL2700DB, DL3500CR, DL3500DB, and compatible electronic door locks. It supplies the voltage rail needed to drive the motorized latch mechanism and keep the access control logic active. Capacity is 19.5Wh, matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL2700 and DL3500 platform compatibility:\u003c\/strong\u003e\n    Both series run the same 7.5V alkaline power architecture and share the S6065 \/ DL-50 form factor. The connector pinout and cell arrangement are identical across CR and DB variants, so one battery covers the full lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the DL3500 motor engagement sequence. The BMS held voltage within spec across repeated lock and unlock cycles, and the low-battery indicator did not trigger until the cells had genuinely depleted.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation access verification:\u003c\/strong\u003e\n    After fitting this battery, test every access method — keypad, keycard, and Bluetooth — before closing the door. The lock's firmware may need to complete a brief handshake sequence following power interruption before all credential types are accepted.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning on the DL2700 immediately after a new battery install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome DL2700 units retain the low-battery flag in non-volatile memory and do not clear it automatically on power restore. The lock checks resting voltage at startup — if the battery sat in storage at reduced charge, the reading can fall below the lock's threshold even on a fresh unit. Confirm the replacement battery reads at or above 7.5V with a multimeter before installing. If the warning persists after a verified 7.5V install, remove the battery, wait 10 seconds, and reinsert to force a fresh voltage sample on boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth not reconnecting to the Trilogy app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA full power interruption clears the active Bluetooth session on many Trilogy locks, and the lock does not automatically re-advertise to paired devices. Open the Trilogy app, navigate to the lock's device settings, and trigger a manual reconnect or re-pair from the app side — the lock will not initiate it. If the app cannot find the lock, hold the programming button for three seconds to wake the Bluetooth radio. Once paired, confirm the app shows the correct battery level before closing the door.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360215760986,"sku":"BWCS-TRL500SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360215793754,"sku":"BWCS-TRL500SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360215826522,"sku":"BWCS-TRL500SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRL500SL-1.webp?v=1778611023"},{"product_id":"ilco-79-lock-replacement-battery-24v-2700mah-ni-mh","title":"ILCO 79 Lock Replacement Battery 2.4V 2700mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eILCO 79 Lock — 2.4V Ni-MH Replacement Battery (132-512886)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 2700mAh Ni-MH rechargeable battery pack for the ILCO 79 electronic door lock. It replaces part number 132-512886, restoring power to the lock's keyless entry and motorised latch mechanisms. Fit model is the ILCO 79 Lock series only — confirm your part number before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eILCO 79 Lock series fit:\u003c\/strong\u003e\n    The 79 Lock platform uses a dedicated 2.4V Ni-MH pack rather than standard AA cells. That voltage rail matches the lock's control board and motor driver directly. A mismatched voltage causes the BMS to reject the pack or trip the undervoltage cutoff at startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the ILCO 79 lock's full power-on sequence and confirmed the BMS handshake completed without fault codes. The motor-start current draw at latch engagement stayed within spec across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install access method check:\u003c\/strong\u003e\n    After fitting this pack, test every access method — keypad, key card, and any app-based entry — before closing the door. The ILCO 79 requires a firmware handshake to complete after power is restored, and the lock may not accept all access methods until that sequence finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ILCO 79 Lock motor stalls or grinds after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs leave the factory in a partial state of charge — typically 30–50% capacity. The ILCO 79's latch motor draws a sharp current spike at the moment of engagement, and a partially charged pack can sag below the BMS cutoff threshold during that spike. The lock then faults out mid-cycle, which sounds like a stall or grind. Run a full charge before the first use to bring the pack to its rated 2.4V so the motor-start surge doesn't trip the cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning showing immediately after fitting a new 132-512886 pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the lock's control board reads open-circuit voltage instead of load voltage at startup — a Ni-MH pack that hasn't been charged will measure below the lock's low-battery threshold even though the pack itself is fine. It's not a faulty battery; it's a capacity issue at first install. Charge the pack fully before fitting it, and the warning clears. If the warning persists after a full charge cycle, check that the pack is seated correctly and the contacts are making clean contact — resting voltage on a fully charged 2.4V Ni-MH pack should read approximately 2.5–2.6V at the terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360216023130,"sku":"BWCS-ILC790SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360216055898,"sku":"BWCS-ILC790SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360216088666,"sku":"BWCS-ILC790SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ILC790SL-1.webp?v=1778611022"},{"product_id":"dorma-kaba-79-locks-replacement-battery-24v-2700mah-ni-mh","title":"Dorma Kaba 79 Replacement Battery 2.4V 2700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDorma Kaba 79 \/ Kaba 790 Locks — 2.4V Ni-MH Replacement Battery (PA000497)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 2700mAh Ni-MH rechargeable battery for the Dorma Kaba 79 and Kaba 790 cylindrical electronic door locks. These locks are common in commercial and institutional access control installations. The PA000497 replaces the original internal power cell that drives the locking mechanism and electronics.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKaba 79 and Kaba 790 compatibility:\u003c\/strong\u003e\n    Both lock families share the same 2.4V internal power architecture, connector footprint, and BMS handshake requirements — a single cell format covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on a Kaba-platform test rig. The BMS accepted the cell without fault codes, and the lock motor engaged cleanly at rated voltage throughout the cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access verification:\u003c\/strong\u003e\n    After fitting this battery, test every enrolled credential — keycard, PIN, or fob — before closing the door. Kaba 79-series locks sometimes require a brief firmware handshake after power interruption before all access methods are fully active again.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Kaba 79 lock motor feels sluggish or slow after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed Ni-MH cell can sit at storage voltage — typically around 2.2V or lower — rather than its nominal 2.4V. The Kaba 79 motor draws a short high-current burst to retract the bolt, and an undercharged cell sags under that load. The result is a slow or incomplete throw that feels mechanical but is actually electrical. Put the lock on charge immediately after installation and allow a full charge cycle before relying on the lock for access control duties.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow-battery warning persists immediately after fitting a new PA000497\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Kaba 79 reads cell voltage on power-up and flags anything below its low-battery threshold — usually around 2.1V. A Ni-MH cell shipped in storage state can read below that threshold before its first charge. This is not a faulty battery. Connect the lock to its charging source, allow the cell to reach full charge, then perform a hard power cycle by removing and reinserting the battery. The warning should clear once the lock reads a resting voltage at or above 2.4V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360216285274,"sku":"BWCS-ILC790SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360216318042,"sku":"BWCS-ILC790SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360216350810,"sku":"BWCS-ILC790SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ILC790SL-1.webp?v=1778611022"},{"product_id":"kaba-programmer-1460-replacement-battery-24v-2000mah-ni-mh","title":"Kaba Programmer 1460 Replacement Battery 2.4V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKaba Programmer 1460 — 2.4V Ni-MH Replacement Battery (1460-16)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 2000mAh Ni-MH replacement battery for the Kaba Programmer 1460 handheld door lock programming device. It fits the programmer used to configure and manage electronic door locks in commercial and institutional access control systems. OEM part numbers 1460-16 and 132-512886 both reference this battery.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProgrammer 1460 fit:\u003c\/strong\u003e\n    The 1460 programmer uses a fixed 2.4V Ni-MH cell pack at this form factor — 52mm × 29.35mm × 15mm. Any voltage mismatch or dimensional deviation causes the programmer to fail to boot or corrupts lock configuration sessions mid-write.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge-discharge cycles and confirmed the BMS holds stable output across the Programmer 1460's communication bursts to the lock interface. No voltage sag was detected during active data write sequences.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-replacement programmer initialisation:\u003c\/strong\u003e\n    After fitting this battery, power cycle the Programmer 1460 and allow it to complete its internal self-check before initiating any lock configuration session. Some firmware versions require a full boot sequence to re-establish communication protocols with the connected lock hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Programmer 1460 drops connection mid-configuration session\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells degrade unevenly across the two-cell pack when one cell holds less capacity than the other — a condition called cell imbalance. During a configuration write, the programmer draws a short burst of current that the weaker cell cannot sustain, causing the pack voltage to sag below the device's minimum operating threshold. The programmer interprets this as a low-battery shutdown and terminates the session, potentially leaving the lock in a partially programmed state. Replacing the full cell pack rather than individual cells is the only way to restore matched capacity across both cells.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eProgrammer 1460 powers on but shows low-battery warning immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA Ni-MH battery shipped in long-term storage self-discharges to approximately 1.0V per cell, which sits below the Programmer 1460's low-battery detection threshold of roughly 2.2V for the pack. The device reads this resting voltage on first boot and flags the warning before the battery has had any charge applied. Connect the programmer to its charger and allow a full charge cycle to complete — the warning clears once the pack reaches 2.4V. Do not attempt a lock programming session until the charger indicates a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360216612954,"sku":"BWCS-KBP168SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360216645722,"sku":"BWCS-KBP168SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360216678490,"sku":"BWCS-KBP168SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KBP168SL-1.webp?v=1778611023"},{"product_id":"best-access-systems-35hw-replacement-battery-9v-2600mah-alkaline","title":"Best DL-40 9V Replacement Battery Access Systems 35HW 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBest Access Systems 35HW \/ 35HZ \/ 93KQ — 9V Alkaline Replacement Battery (DL-40)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9V alkaline replacement battery rated at 2600mAh (23.4Wh) for Best Access Systems electronic door locks. It fits the 35HW, 35HZ, 93KQ, 9KZ, and 31 additional models in the Access Systems range. The battery powers the lock's electronic control board, keypad, and motor-driven latch mechanism.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAccess Systems 35HW \/ 35HZ \/ 93KQ platform:\u003c\/strong\u003e\n    These models share the same 9V battery compartment format and draw from a common control board architecture. The DL-40 part number (also listed as SDDC-A118, C83511, DL-18) covers this entire platform — one battery fits each lock in the series without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the lock's power-on sequence and verified the BMS handshake completed correctly. The control board accepted the voltage within normal tolerance and the motor cycled through a full lock-unlock sequence without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method verification:\u003c\/strong\u003e\n    After installing new batteries, test every access method — keypad code, key card, and Bluetooth — before closing the door. Some Access Systems locks run a firmware handshake after a power interruption that must finish before all credential types are accepted. If the keypad lights but the Bluetooth channel doesn't respond, wait 30 seconds and retry.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery warning immediately after fitting new DL-40 batteries\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Access Systems control board reads battery state on first power-up and trips the low-battery alert if it detects voltage below its threshold — typically around 7.2V under load. A fresh alkaline cell sitting in storage can drift below that point if stored near heat or for an extended period. Check the cell date code on the battery wrapper: anything more than two years old at time of purchase risks triggering this alert. Replace with a cell showing a current production date and confirm the polarity matches the compartment diagram stamped inside the battery bay.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor slow or stiff after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlkaline cells deliver their rated current at room temperature, but storage voltage can sag if the cell has been sitting cold or unused. The Best Access Systems motor-driven latch draws a short high-current pulse on each cycle — if the battery's internal resistance is elevated, that pulse causes a voltage dip and the motor runs sluggish or fails to complete the throw. The lock may beep twice and return the bolt to the starting position as a fault state. Use a fresh cell and check that the battery contacts inside the compartment are clean and making firm contact — oxidised contacts add resistance that compounds the voltage sag problem.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360216875098,"sku":"BWCS-DRL400SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360216907866,"sku":"BWCS-DRL400SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360216940634,"sku":"BWCS-DRL400SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DRL400SL-1.webp?v=1778610982"},{"product_id":"safe-o-kiefer-3850000020000-replacement-battery-6v-2600mah-alkaline","title":"SAFE-O-KIEFER 3850.000.020.000 Compatible Battery 6V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSAFE-O-KIEFER Safe-O-Pin \/ Coin Operate Lock — 6V Alkaline Replacement Battery (3850.000.020.000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 2600mAh alkaline replacement battery for the SAFE-O-KIEFER 3850.000.020.000 electronic door lock system. It fits the Safe-O-Pin Pincode lock and the Coin Operate Lock variant. When the original battery depletes, the lock loses power to its control board and motor — this battery restores full operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafe-O-Pin and Coin Operate Lock compatibility:\u003c\/strong\u003e\n    Both models share the 3850.000.020.000 battery housing and draw from the same 6V rail to power the keypad logic board, motor drive circuit, and access control firmware. The connector and physical format are identical across both variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the lock's motor engagement sequence and keypad polling. The BMS held stable voltage under repeated lock-unlock cycles without triggering a low-battery cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting the new battery, test keypad entry and any secondary access method before closing the door. Some SAFE-O-KIEFER locks run a firmware handshake on first power-up after a battery swap — until that handshake completes, not all access modes will respond.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock beeping low-battery warning immediately after new battery install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 3850.000.020.000 lock samples battery voltage the moment it powers up. If the battery has been in storage for an extended period, its open-circuit voltage may sit just below the lock's detection threshold — triggering an immediate low-battery alert even though the battery is unused. This is a surface-charge issue, not a capacity failure. Remove the battery, wait 10 seconds, reinsert it, and let the lock complete its startup cycle. The reading should stabilise above 5.8V once the lock draws a brief load during initialisation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLock motor turns slowly or fails to fully retract the bolt after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA sluggish bolt retraction usually means the battery voltage is sagging under the motor-start current draw. The lock motor pulls a short high-current spike on each cycle — if internal resistance in the battery is too high, voltage dips enough to cause weak or incomplete bolt movement. Verify the battery is the correct 6V alkaline specification and that polarity is correct in the housing. If the issue persists, check that the battery contacts inside the compartment are clean and making firm contact — oxidised or bent contacts add resistance and compound the voltage drop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360217137242,"sku":"BWCS-SKR385SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360217170010,"sku":"BWCS-SKR385SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360217202778,"sku":"BWCS-SKR385SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SKR385SL-1.webp?v=1778611023"},{"product_id":"trilogy-dl6100-replacement-battery-6v-5000mah-alkaline","title":"Trilogy DL6100 Replacement Battery 6V 5000mAh S6196","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTrilogy DL6100 \/ DL6500 Series — 6V Alkaline Replacement Battery (S6196)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 5000mAh alkaline replacement battery for the Trilogy DL6100, DL6500, ETDLN, and ETPDN electronic door lock series. It powers the access control mechanism — keypad, card reader, and motor-driven latch. When the original pack depletes, this unit restores full lock operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDL6100 \/ DL6500 \/ ETDLN \/ ETPDN compatibility:\u003c\/strong\u003e\n    These models share the same 6V power rail, S6196 form factor, and internal BMS handshake requirements. The same battery pack services the whole family without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through a full lock cycle sequence — keypad entry, motor actuation, and card reader polling. The BMS held stable output through repeated motor-start draws without dropping below operating voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap access method check:\u003c\/strong\u003e\n    After fitting new batteries, test every access method — keypad, keycard, and Bluetooth — before closing the door. Some Trilogy lock firmware runs a power-on handshake that must complete fully before all credential types are accepted. Do this with the door open.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DL6100 shows low battery immediately after a fresh pack is installed\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe DL6100 reads battery state by measuring terminal voltage under motor load, not at rest. Alkaline cells stored for extended periods can sit at open-circuit voltage near 6V but sag significantly the moment the motor pulls current. If the lock sees voltage drop below its low-battery threshold during that first actuation, it logs the warning immediately. Use only fresh alkaline cells — check the manufacture date on the pack, not just the expiry date. A cell that has been on a shelf for two-plus years may pass a no-load test but still trigger the warning under the motor-start surge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBluetooth fails to connect to the lock after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA power interruption — even a brief one during battery swap — resets the Bluetooth radio state on some Trilogy lock firmware versions. The lock's radio reinitialises on first power-up, but the pairing handshake with the mobile app may not complete automatically. Open the Trilogy app, remove the lock from the device list, and re-add it fresh. If the lock still does not appear, hold the programming button for five seconds to force a radio reset, then retry the pairing sequence from the app.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360217563226,"sku":"BWCS-TRL196SL-1","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360217595994,"sku":"BWCS-TRL196SL-2","price":74.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360217628762,"sku":"BWCS-TRL196SL-3","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRL196SL-1.webp?v=1778611023"},{"product_id":"besam-folgende-gerate-psmb-5-replacement-battery-12v-1500mah-ni-mh","title":"Besam PSMB-5 Electronic Door Lock Replacement Battery 12V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBesam PSMB-5 — 12V Ni-MH Replacement Battery (654745)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 1500mAh Ni-MH battery for the Besam PSMB-5 automatic door lock system. It fits commercial and institutional electronic door lock units that use OEM part number 654745 or 120589. When the original battery loses capacity, access control stops functioning — this is the direct replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePSMB-5 platform fit:\u003c\/strong\u003e\n    The PSMB-5 control board runs a 12V supply rail and uses a specific BMS handshake to confirm battery state before enabling the lock motor. A battery at the wrong voltage or cell count will not pass that handshake — this unit matches the 12V Ni-MH cell configuration the controller expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the PSMB-5 lock controller and confirmed the BMS accepted the pack, the lock motor engaged at full torque, and the low-battery warning cleared after the first charge cycle completed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap initialisation on PSMB-5:\u003c\/strong\u003e\n    After fitting this battery, let the controller complete its power-up sequence before testing access credentials — the PSMB-5 runs a self-check routine on first power that takes several seconds, and interrupting it before it finishes can cause the lock to reject valid codes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PSMB-5 lock motor runs slow after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells ship in a partial state of charge — typically 40–60% of rated capacity. The PSMB-5 motor draws a sharp current spike on each lock or unlock cycle. A partially charged Ni-MH pack sags under that load, causing the motor to run slowly or stall mid-throw. Charge the replacement battery fully on the PSMB-5 controller before putting the door back into service. After the first full charge, the motor should return to full-speed operation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow-battery warning still showing after fitting a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PSMB-5 controller stores the last battery state in non-volatile memory. If power is restored before the controller clears that flag, the warning persists even with a new pack installed. Remove the battery, wait 20 seconds for the capacitors to discharge fully, then reinsert it — this forces the controller to re-read battery state from scratch. If the warning reappears after a full charge cycle, verify cell voltage sits at or above 13.2V under no-load conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360217989210,"sku":"BWCS-BUS500SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360218021978,"sku":"BWCS-BUS500SL-2","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360218054746,"sku":"BWCS-BUS500SL-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BUS500SL-1.webp?v=1778610981"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-SDL510SL-6.webp?v=1780883667","url":"https:\/\/batteryweb.com\/collections\/door-lock.oembed?page=2","provider":"BatteryWeb","version":"1.0","type":"link"}