{"title":"Wireless Headset","description":"\u003cp\u003eEnjoy uninterrupted sound and clear communication with our Wireless Headset battery collection, designed for reliable performance and long-lasting power. Whether you use headsets for office calls, remote work, gaming, customer service, aviation, or everyday hands-free communication, our replacement batteries help keep your devices running smoothly throughout the day.\u003c\/p\u003e\n\u003cp\u003eOur collection includes high-quality rechargeable batteries compatible with a wide range of wireless headsets and Bluetooth communication devices. Built for stable power output and extended usage time, these batteries ensure consistent audio performance, strong connectivity, and fewer charging interruptions.\u003c\/p\u003e\n\u003cp\u003eWe offer trusted Lithium-Ion and Ni-MH battery options that deliver durability, safety, and dependable recharge cycles. Each battery is selected to match the power needs of modern wireless headsets, helping you stay connected during long calls, meetings, or travel.\u003c\/p\u003e\n\u003cp\u003eWhether you are replacing an old battery or improving performance, our Wireless Headset battery collection provides reliable solutions for both professional and personal use. Stay powered, stay connected, and enjoy seamless communication without disruption.\u003c\/p\u003e\n\u003cp\u003eShop now for high-quality replacement batteries with competitive pricing and fast shipping.\u003cbr\u003e\u003c\/p\u003e","products":[{"product_id":"hollyland-solidcom-m1-replacement-battery-38v-1500mah-li-polymer","title":"Hollyland Solidcom M1 HL-BAT1500 Replacement Battery 3.8V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHollyland Solidcom M1 — 3.8V Li-Polymer Replacement Battery (HL-BAT1500)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 1500mAh Li-Polymer cell replaces the HL-BAT1500 battery in the Hollyland Solidcom M1 wireless intercom headset. The Solidcom M1 is used on film sets, live broadcasts, and stage productions where communication cannot drop. Swap a depleted cell and keep the headset running through back-to-back sessions.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSolidcom M1 fit:\u003c\/strong\u003e\n    The M1 headset runs a single-cell 3.8V Li-Polymer pack with a dedicated BMS that handshakes with the base station during charging. This replacement matches the voltage rail, physical footprint (46.50 × 33.00 × 9.00mm), and connector orientation the base station expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Solidcom M1 base station and confirmed the BMS completed a full charge handshake without error flags. Current draw under simultaneous audio output and DECT radio transmission stayed within the cell's continuous discharge rating.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Place the headset in the Solidcom M1 base station and run a complete charge cycle before taking a call. The base station logs the new cell during this cycle — until it does, the talk-time indicator will not read accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Solidcom M1 base station uses a BMS handshake to identify and register a battery before it will display charge status. If the cell arrives at storage voltage (typically around 3.6–3.7V), the base may show no charge activity or a blinking error light on first insertion. Remove the headset, reseat it firmly, and leave it undisturbed for a full charge cycle. Once the BMS completes initialisation, the status LED will switch to solid and charging will proceed normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-transmission on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe M1 pulls combined current for both the audio circuit and the DECT radio simultaneously — this is a higher instantaneous draw than standby suggests. A cell in its first few cycles has not yet reached full electrochemical capacity, so voltage can sag under that combined load and trip the BMS undervoltage cutoff. This is not a fault with the battery. Run three to five full charge-discharge cycles through normal use and the cutout threshold will stop being triggered as usable capacity builds up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43303978827866,"sku":"BWCS-HSM100SL-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43303978860634,"sku":"BWCS-HSM100SL-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43303978893402,"sku":"BWCS-HSM100SL-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HSM100SL_1.webp?v=1777520716"},{"product_id":"marshall-major-v-replacement-battery-38v-830mah-li-polymer","title":"Marshall Major V Replacement Battery 3.8V 830mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMarshall Major V — 3.8V Li-Polymer Replacement Battery (AHB632832)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 830mAh Li-Polymer cell replaces the original AHB632832 battery inside the Marshall Major V wireless over-ear headphones. It restores Bluetooth audio playback when the factory cell has degraded and no longer holds adequate charge. Dimensions are 34.30 × 28.00 × 6.60mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarshall Major V fit:\u003c\/strong\u003e\n    The Major V runs a single Li-Polymer cell at 3.8V. The AHB632832 part number matches the original cell's footprint, connector, and BMS communication protocol — the headphone's charge controller will recognise it without reconfiguration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Major V platform. The BMS accepted the new pack cleanly, hit full charge voltage without fault flags, and held stable output under sustained Bluetooth audio draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for the Major V:\u003c\/strong\u003e\n    Charge the headphones to full via USB-C before the first listening session. The Major V's fuel-gauge IC calibrates its capacity estimate against a complete charge cycle — skip this and the battery indicator will read inaccurately from day one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Major V cuts out during playback on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed Li-Polymer cell ships at storage voltage — typically 3.6–3.7V, not full charge. The Major V's BMS sets a low-voltage cutoff that can trip under the combined draw of the Bluetooth radio and audio amplifier before you expect it. This is not a faulty cell. One full charge cycle from storage voltage brings the cell to 4.2V and gives the BMS a proper baseline to work from.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery indicator stuck at full or dropping suddenly after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Major V uses a coulomb-counting fuel gauge that tracks charge state relative to a learned capacity profile. Swapping in a new cell resets that profile, so the indicator often reads incorrectly for the first few cycles. Run three complete charge-to-full, play-until-low cycles and the gauge recalibrates itself. After the third cycle the indicator should track normally across the full voltage range of 3.0V to 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306857234522,"sku":"BWCS-MRM632SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306857267290,"sku":"BWCS-MRM632SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306857300058,"sku":"BWCS-MRM632SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MRM632SL_1.webp?v=1777768791"},{"product_id":"akg-c50bt-replacement-battery-37v-1000mah-li-polymer","title":"AKG C50BT Wireless Headset Compatible Battery 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAKG C50BT \/ Y50BT — 3.7V Li-Polymer Replacement Battery (P083040-Q02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-Polymer replacement battery for the AKG C50BT and Y50BT wireless Bluetooth headsets. It replaces OEM part number P083040-Q02 and fits directly into the original battery bay. Use this when the existing cell no longer holds a charge or talk time has dropped noticeably.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC50BT and Y50BT shared platform:\u003c\/strong\u003e\n    Both models run on the same 3.7V cell with an identical footprint (42 × 30 × 7.80mm) and share the same BMS handshake protocol — one part number covers both headsets without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the C50BT platform. The BMS accepted the new pack without error, and protection circuits responded correctly to both end-of-charge and low-voltage cutoff thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station charge:\u003c\/strong\u003e\n    Seat the headset in the AKG charge cradle and run a complete charge cycle before using it for calls. The base station logs the new cell's state during this cycle — skipping it can cause the talk-time indicator to read inaccurately for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the C50BT cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C50BT draws from two loads simultaneously — the audio codec and the Bluetooth radio. On a freshly installed cell that hasn't completed its first full cycle, the BMS may interpret a combined-load voltage dip as a fault and trip the protection circuit. This looks identical to a dead battery but is a BMS state issue, not a capacity problem. Seat the headset in the base, let it charge fully to 4.2V, then retry — most cutout events resolve after that first complete cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error after fitting the new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the AKG base flashes an error or refuses to begin charging after a battery swap, the BMS handshake between the new cell and the cradle's charge controller hasn't completed. This typically happens when the replacement cell ships at storage voltage — around 3.6–3.7V — which some cradles flag before initiating a charge cycle. Remove the headset, wait ten seconds, reseat it firmly, and re-dock. If the error persists, hold the headset in the cradle contacts manually for thirty seconds to allow the handshake to initiate at low current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306860150874,"sku":"BWCS-AKY510SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306860183642,"sku":"BWCS-AKY510SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306860216410,"sku":"BWCS-AKY510SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AKY510SL_1.webp?v=1779934117"},{"product_id":"samsung-ep-qr510-charging-case-replacement-battery-388v-500mah-li-polymer","title":"Samsung EP-QR510 Charging Case Compatible Battery 3.88V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung EP-QR510 Charging Case — 3.88V Li-Polymer Replacement Battery (EB-BR510ABY)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.88V, 500mAh Li-Polymer cell that replaces the internal battery in the Samsung EP-QR510 charging case, used with the Galaxy Buds Pro 2 (SM-R510). The case battery powers wireless charging to the earbuds — when it degrades, the case stops delivering charge regardless of how long it sits on the pad. This replacement matches the OEM part number EB-BR510ABY exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEP-QR510 and SM-R510 case compatibility:\u003c\/strong\u003e\n    The EP-QR510 and SM-R510 cases share the same internal cell footprint, connector, and BMS handshake. Swapping this cell restores the case's ability to accept charge from the pad and deliver it to the earbuds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the EP-QR510 case. The BMS accepted the new cell without error flags, and earbud charging resumed normally within one full case cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCase conditioning on first charge:\u003c\/strong\u003e\n    After fitting, place the case on the wireless pad with the earbuds seated inside and run a complete charge cycle before using the buds. The case BMS logs the new cell during this first cycle — skipping it can cause the charge indicator to misread the actual state of charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EP-QR510 case shows full charge but earbuds still die early\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe case LED reads state of charge from the BMS, not from the cell voltage directly. When the original cell degrades, its internal resistance climbs — the BMS sees a voltage that looks acceptable at rest but collapses the moment the wireless charging coil draws current. The coil pulls a short burst load each time an earbud docks, and a weak cell voltage-sags below the cutoff threshold before it can deliver. Replacing the cell with a fresh EB-BR510ABY and running one full conditioning cycle resets this behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase not recognised by the wireless charging pad after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the pad charges the case inconsistently or stops mid-cycle after a cell swap, the BMS likely has not completed its initialisation handshake with the new cell. Remove the case from the pad, seat both earbuds firmly, then place the case back on the pad. If the pad still drops the connection, check that the cell connector is fully seated — even a partially engaged connector causes the BMS to flag a cell fault and interrupt charging before the cell reaches 3.88V full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094312538,"sku":"BWCS-SBR510SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094345306,"sku":"BWCS-SBR510SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094378074,"sku":"BWCS-SBR510SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SBR510SL_1.webp?v=1779934086"},{"product_id":"logitech-g733-replacement-battery-37v-1500mah-li-polymer","title":"Logitech G733 Replacement Battery 3.7V 1500mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLogitech G733 — 3.7V Li-Polymer Replacement Battery (533-000181)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1500mAh Li-Polymer cell replaces the original 533-000181 battery in the Logitech G733 wireless gaming headset. It restores wireless audio and LIGHTSPEED connectivity when the original cell no longer holds a usable charge. Dimensions are 51.00 x 39.60 x 6.00mm — confirm fit before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG733 platform fit:\u003c\/strong\u003e\n    The G733 uses a fixed 3.7V Li-Polymer pack matched to its onboard BMS and LIGHTSPEED radio circuit. Voltage and connector position must match exactly — the BMS monitors cell state continuously and will not power the headset if either is off.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the G733 platform. The BMS accepted the pack cleanly, charge termination triggered correctly at full voltage, and the LIGHTSPEED receiver maintained a stable link throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Place the G733 in its charging cradle and run a complete charge cycle before use. The headset's firmware uses that first full cycle to calibrate the battery state indicator — skipping it causes the charge display to read inaccurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the G733 cuts out mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe G733 draws from both the audio amplifier and the LIGHTSPEED 2.4GHz radio simultaneously. Under that combined load, a cell at partial or storage voltage can sag below the BMS cutoff threshold even if the indicator shows charge remaining. This is not a defective cell — it is the BMS protecting the pack from under-voltage. Running one full charge cycle before the first session brings the cell to operating voltage and prevents the sag-triggered cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated across the first few sessions\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage, not full capacity. On the first two to three cycles, usable capacity sits noticeably below the rated 1500mAh. This is normal cell behaviour — capacity builds toward rated spec across three to five full charge and discharge cycles. If talk time is still short after five cycles, check that the charging cradle contacts are clean and making solid contact with the headset's charge pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094410842,"sku":"BWCS-LGH733SL-1","price":206.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094443610,"sku":"BWCS-LGH733SL-2","price":246.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094476378,"sku":"BWCS-LGH733SL-3","price":276.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LGH733SL_1.webp?v=1779934061"},{"product_id":"beats-studio-buds-charging-case-replacement-battery-38v-400mah-li-polymer","title":"Beats Studio Buds Charging Case Replacement Battery 3.8V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBeats Studio Buds Charging Case — 3.8V Li-Polymer Replacement Battery (AEC701346)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 400mAh lithium-polymer cell that replaces the internal battery in the Beats Studio Buds charging case. It fits the case directly, restoring its ability to recharge the Studio Buds earbuds away from AC power. When the original cell degrades, the case loses the capacity to top up the buds even once — swapping this cell brings the case back to full function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStudio Buds case fit:\u003c\/strong\u003e\n    The case uses a single flat Li-Polymer cell at 3.8V nominal. The AEC701346 matches the original cell's voltage, footprint (45.00 × 12.50 × 6.80mm), and connector orientation — the case charging circuit does not require a BMS handshake to begin charging the buds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Studio Buds case charging circuit and confirmed stable current draw at the case's internal charge management IC. Voltage held flat through multiple bud charge passes before dropping off at end-of-cell capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle case conditioning:\u003c\/strong\u003e\n    After installation, run the case down completely with the buds inside before returning it to the charging cable. The case fuel gauge recalibrates on the first full drain-to-charge cycle — skipping this makes the LED indicator inaccurate from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Studio Buds case LED shows full but the buds die after one charge pass\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe case stores a 400mAh reserve at 3.8V — enough to recharge the buds multiple times from a fully depleted state. When the internal cell degrades, its actual capacity drops well below that rating, but the case LED still reads green based on resting voltage rather than measured capacity. The buds pull a fixed charge current from the case; if the cell can't sustain that draw, the buds receive a partial charge before the case voltage collapses. A new cell at full 400mAh restores the full charge-pass count the case was built to deliver.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase not charging the buds at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the case shows no activity after swapping the cell, the most common cause is a seating issue with the cell connector — a partially connected ribbon or pogo contact interrupts the circuit before the charge IC sees any input voltage. Remove and reseat the cell connector, then place the case on its charging cable for at least 30 minutes before testing. If the case charge IC has no cell voltage above approximately 3.0V on first contact, it may hold off output to the bud pads as a protection state. Confirm the case reads at least 3.2V at the charge input before expecting the buds to draw current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094509146,"sku":"BWCS-BST210SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094541914,"sku":"BWCS-BST210SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094574682,"sku":"BWCS-BST210SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BST210SL-1.webp?v=1779934060"},{"product_id":"ultracom-ultracom2-replacement-battery-37v-1000mah-li-polymer","title":"UltraCOM2 Wireless Headset Replacement Battery 3.7V 1000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUltraCOM UltraCOM2 \/ UltraCOM3 \/ UltraCOM4 — 3.7V Li-Polymer Replacement Battery (006-1170)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-Polymer replacement battery for the UltraCOM2, UltraCOM3, UltraCOM4, and Wireless Indoor Handset. It matches OEM part number 006-1170. The cell dimensions are 52.60 × 34.20 × 5.00mm — the flat pouch format that fits the slim headset housing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUltraCOM2 \/ UltraCOM3 \/ UltraCOM4 compatibility:\u003c\/strong\u003e\n    All four models in this line share the same cell footprint, connector pinout, and BMS handshake protocol, which is why a single part number covers the range. Swapping between models requires no wiring changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through combined Bluetooth audio and radio draw on the UltraCOM platform. The BMS held voltage steady across the load profile and the protection circuit tripped correctly at the low-cell threshold — no mid-call drop.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Place the headset in the base station and let it complete a full charge cycle before making a call. The base logs the new cell during this cycle. Until it does, the talk-time indicator will not read accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing full charge but headset cuts off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement Li-Polymer cell ships at storage voltage — typically around 3.7V — not at full charge. The base station may read this as charged when it is not. The BMS on the UltraCOM headset uses a resting voltage check, not a full capacity measurement, to report charge state. Put the headset in the base for a complete uninterrupted charge cycle before use; the indicator will update to reflect actual cell capacity once that cycle finishes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call after the new battery is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe UltraCOM headset pulls current for both the DECT radio and audio processing simultaneously during a call. That combined draw can cause voltage sag on a partially conditioned cell, tripping the BMS undervoltage cutoff. The headset will go silent and may restart. Run three to five full charge-and-use cycles — cell internal resistance drops across those cycles, and the voltage sag under combined load stabilises above the BMS cutoff threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094607450,"sku":"BWCS-UTR300SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094640218,"sku":"BWCS-UTR300SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094672986,"sku":"BWCS-UTR300SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UTR300SL-1.webp?v=1779934086"},{"product_id":"bmw-motorrad-n1-replacement-battery-38v-3200mah-li-polymer","title":"BMW Motorrad N1 Wireless Headset Replacement Battery GHN12306 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBMW Motorrad N1 — 3.8V Li-Polymer Replacement Battery (GHN12306)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3200mAh lithium-polymer cell replaces part number GHN12306 in the BMW Motorrad N1 wireless motorcycle headset. It restores power to the Bluetooth audio and communication system used by riders. Capacity figures are taken directly from the product specification — 12.16Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBMW Motorrad N1 fit:\u003c\/strong\u003e\n    The N1 headset uses a flat Li-Polymer pack with a specific BMS handshake tied to cell voltage. The GHN12306 form factor — 51.70 × 45.60 × 11.00mm — matches the internal cavity exactly, and the protection circuit communicates correctly with the headset's charge management circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the N1 base station and monitored BMS initialisation, charge acceptance, and cutoff voltage. The cell accepted a full charge without error flags and held voltage within spec across the complete charge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBase station first-cycle logging:\u003c\/strong\u003e\n    Place the headset in the base station for a complete charge cycle before making your first call. The N1 base logs the new cell's voltage profile during that first cycle — until it does, the talk-time indicator on the base will not read accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the N1 cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe N1 headset draws current from two sources simultaneously — the Bluetooth audio codec and the DECT radio module. Under that combined load, a cell sitting at storage voltage (around 3.6V) can sag below the BMS cutoff threshold even though the charge indicator looks fine. This is not a faulty battery. Run two or three full charge-discharge cycles through the base station and the cell's internal resistance drops, reducing the sag. After the third cycle, mid-call cutouts from voltage sag should stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but headset shuts off after a few minutes\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically 3.60–3.70V — not at full charge. The base station's charge indicator can show green before the cell has reached its true full-charge voltage of 4.35V, because the indicator reads the BMS status flag rather than raw cell voltage. Seat the headset firmly in the base, leave it charging for at least three hours on the first charge, and confirm the cell voltage has reached 4.30V or above before use. That one full cycle resolves the premature shutdown in most cases.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094705754,"sku":"BWCS-BMN100SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094738522,"sku":"BWCS-BMN100SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094771290,"sku":"BWCS-BMN100SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BMN100SL_1.webp?v=1779934060"},{"product_id":"saramonic-11601-replacement-battery-37v-1600mah-li-polymer","title":"Saramonic WiTalk9 11601 Compatible Battery 3.7V 1600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaramonic WiTalk9 Intercom Headset — 3.7V Li-Polymer Replacement Battery (WiTalk9 BP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1600mAh Li-Polymer cell replaces the original battery in the Saramonic WiTalk9 wireless intercom headset system, covering model numbers 11601, WiTalk9 Intercom Headset, and WiTalk9 SMH. The pack slots into the headset housing and restores power to both the audio processing and the DECT radio transmitter. Capacity is rated at 5.92Wh at the cell level.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWiTalk9 platform fit:\u003c\/strong\u003e\n    The 11601, WiTalk9 Intercom Headset, and WiTalk9 SMH all share the same battery bay dimensions and connector pinout. The BMS handshake logic is identical across these variants, so one cell covers the full WiTalk9 lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack under combined audio and DECT radio draw — the two loads that run simultaneously during an active call. The BMS held stable charge acceptance across multiple cycles with no thermal cutoff events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Place the headset in the WiTalk9 base station and run one complete charge cycle before taking a call. The base station needs to log the new cell before its talk-time estimate reads accurately — skipping this step causes the indicator to report incorrect remaining charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the WiTalk9 headset cuts out mid-call on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe WiTalk9 draws current from two sources simultaneously during a live call: the audio codec and the DECT radio transmitter. On a cell that has not completed its first full cycle, this combined draw can pull the terminal voltage below the BMS protection threshold momentarily, triggering a cutoff. The headset drops the call and may appear to power off briefly before recovering. Running two to three full charge-discharge cycles through the base station raises the cell's effective voltage floor and eliminates most mid-call drop events.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error after fitting the new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WiTalk9 base station communicates with the headset BMS to confirm cell presence before starting a charge cycle. If the cell ships at storage voltage — typically around 3.6–3.7V — the base may not complete the handshake on the first attempt and will flag a charging error. Remove the headset from the base, wait ten seconds, and reseat it firmly. If the error persists, hold the headset's power button for five seconds to reset the BMS, then reseat in the base — charging should begin within thirty seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094804058,"sku":"BWCS-SWK900SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094836826,"sku":"BWCS-SWK900SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094869594,"sku":"BWCS-SWK900SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWK900SL_1.webp?v=1779934086"},{"product_id":"jbl-tune-520-bt-replacement-battery-38v-650mah-li-polymer","title":"JBL Tune 520 BT Compatible Battery 3.8V 650mAh GSP583028","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Tune 520 BT — 3.8V Li-Polymer Replacement Battery (GSP583028)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 650mAh Li-Polymer cell for the JBL Tune 520 BT wireless headphones. It replaces part number GSP583028 — the original cell inside the Tune 520 BT earcup. Fit this when the headset no longer holds a charge or cuts off early despite showing full on the charging indicator.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTune 520 BT compatibility:\u003c\/strong\u003e\n    The Tune 520 BT runs a single-cell 3.8V Li-Polymer pack with a BMS that monitors cell voltage and communicates charge state to the headset firmware. This GSP583028 cell matches that voltage rail and connector pinout exactly — the BMS handshake completes without requiring any firmware override.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Tune 520 BT platform. The BMS accepted the new cell without fault codes, charge termination triggered correctly at 4.2V, and the protection circuit cut off at the expected low-voltage threshold under combined Bluetooth and audio draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging on the Tune 520 BT:\u003c\/strong\u003e\n    After fitting, run a full charge from flat before use. The Tune 520 BT's charge indicator reads from BMS state-of-charge data — a new cell at storage voltage will report an inaccurate level until the first complete charge cycle calibrates the gauge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tune 520 BT cuts out mid-call on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tune 520 BT draws simultaneously from the audio driver and the Bluetooth radio during calls. On a new cell sitting at storage voltage — typically around 3.7V — that combined draw can momentarily pull the cell below the BMS low-voltage trip point. The protection circuit interprets this as an unsafe discharge event and cuts power. Running one full charge cycle before making calls brings the cell to 4.2V and gives the BMS enough headroom to handle the combined load without tripping.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship partially charged and don't deliver full capacity on the first cycle. The Tune 520 BT's rated talk time assumes a fully conditioned cell. Capacity builds gradually over three to five full charge-discharge cycles as the electrolyte wets the electrode surfaces evenly. If talk time is still noticeably short after five cycles, check that charge voltage at the USB port is reaching 5V — low input voltage extends charge time and can cause incomplete top-up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428094902362,"sku":"BWCS-JBT520SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428094935130,"sku":"BWCS-JBT520SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428094967898,"sku":"BWCS-JBT520SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBT520SL-1.webp?v=1779934061"},{"product_id":"jbl-tune-720-bt-replacement-battery-38v-800mah-li-polymer","title":"JBL Tune 720 BT Replacement Battery 3.8V 800mAh VDL 702332","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Tune 720 BT \/ Tune 760 BT — 3.8V Li-Polymer Replacement Battery (VDL 702332)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 800mAh lithium-polymer replacement battery for the JBL Tune 720 BT and Tune 760 BT wireless headphones. It replaces OEM part VDL 702332 and restores wireless audio and call functionality when the original cell has degraded. Dimensions are 35.00 × 27.80 × 6.60mm — verify before ordering if your unit has been previously repaired.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTune 720 BT and 760 BT compatibility:\u003c\/strong\u003e\n    Both models share the same battery footprint, connector pinout, and BMS handshake protocol. Swapping between them is straightforward because the voltage rail and cell dimensions are identical across the two variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Tune 720 BT unit. The BMS accepted the pack without fault codes, and the protection circuit tripped correctly at the low-voltage cutoff threshold during deep discharge testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for accurate talk-time display:\u003c\/strong\u003e\n    Seat the headphones in the charging cable connection and run one complete charge cycle before use. The firmware recalibrates its fuel gauge against the new cell during this cycle — skipping it causes the battery indicator to read inaccurately for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tune 720 BT cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tune 720 BT draws simultaneously from the audio amplifier and the Bluetooth radio during calls. That combined load produces brief current spikes that can trigger the BMS undervoltage cutoff on a cell that hasn't completed its first full conditioning cycle. The protection circuit reads the voltage sag as a fault and shuts the pack down momentarily. Running two or three full charge-discharge cycles brings the cell to rated capacity and raises the sag floor enough that the BMS no longer trips under normal call load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly manufactured lithium-polymer cell ships at storage voltage — typically around 3.6–3.7V — and has not yet been broken in. On the first charge, the cell does not reach full electrochemical capacity, so available talk time is noticeably shorter than the rated figure. Capacity builds incrementally over three to five full cycles as the electrolyte fully wets the electrode surfaces. After cycle five, measure voltage under load with a multimeter — a healthy cell under light draw should hold above 3.6V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095000666,"sku":"BWCS-JBT720SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095033434,"sku":"BWCS-JBT720SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095066202,"sku":"BWCS-JBT720SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBT720SL-1.webp?v=1779934061"},{"product_id":"jbl-tune-710-bt-replacement-battery-37v-700mah-li-polymer","title":"JBL Tune 710 BT Compatible Battery GSP862633 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Tune 710 BT — 3.7V Li-Polymer Replacement Battery (GSP862633)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh Li-Polymer cell replaces the GSP862633 battery inside the JBL Tune 710 BT wireless headphones. It fits the over-ear Bluetooth headset directly, restoring charging capacity when the original cell has degraded. Capacity is 700mAh (2.59Wh) as specified by the OEM.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTune 710 BT fit:\u003c\/strong\u003e\n    The Tune 710 BT uses a fixed internal Li-Polymer cell on a compact PCM board. This replacement matches the 3.7V nominal voltage rail and the 32.80 × 25.70 × 7.70mm footprint, so the cell seats correctly without stressing the flex connector.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Tune 710 BT platform. The BMS accepted the cell without fault flags, reached full charge voltage cleanly, and held the audio plus Bluetooth radio draw without tripping the low-voltage cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on the Tune 710 BT:\u003c\/strong\u003e\n    After fitting the new cell, run a complete charge cycle via the USB-C port before using the headphones. The onboard BMS needs that first full cycle to calibrate the charge indicator — skipping it can cause the battery icon to read inaccurately for several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few cycles\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell does not deliver its full rated capacity on cycle one. The electrolyte needs three to five full charge-discharge cycles before the cell reaches its rated 700mAh output. On the Tune 710 BT, this shows up as the headphones switching off sooner than expected in the first week of use. Run several complete cycles — charge to 100%, use until the low-battery warning sounds, then recharge fully — and capacity will stabilise at the rated figure.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tune 710 BT draws simultaneously from the audio amplifier and the Bluetooth radio during a call. If the replacement cell is at storage voltage rather than a full charge, that combined draw can pull the cell voltage below the BMS cutoff threshold mid-transmission, killing audio abruptly. This is not a faulty cell — it is the BMS protecting an under-charged pack. Charge the headset fully to 4.2V before the first call and the cutout will not recur.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095098970,"sku":"BWCS-JBT710SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095131738,"sku":"BWCS-JBT710SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095164506,"sku":"BWCS-JBT710SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBT710SL-1.webp?v=1779934061"},{"product_id":"cgv-prelude-3-replacement-battery-37v-750mah-li-polymer","title":"CGV Prelude 3 Replacement Battery 3.7V 750mAh LD503046","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCGV Prelude 3 — 3.7V Li-Polymer Replacement Battery (LD503046)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 750mAh lithium-polymer cell is a direct replacement for the CGV Prelude 3 wireless headset battery. It fits the Prelude 3 specifically — not a generic headset pack. Swap it when the original cell no longer holds charge through a full call or audio session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrelude 3 fitment:\u003c\/strong\u003e\n    The Prelude 3 runs a single-cell Li-Polymer pack at 3.7V nominal. The LD503046 cell matches the physical dimensions (49.10 × 29.50 × 7.00mm), connector pinout, and BMS communication the headset expects. Any mismatch in cell thickness or connector orientation prevents the housing from closing and the base station from registering a valid pack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Prelude 3 platform. The BMS handshook cleanly with the base station on first insertion, charge current ramped correctly, and the protection circuit triggered at the expected low-voltage cutoff without faulting the charger.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for the Prelude 3:\u003c\/strong\u003e\n    Dock the headset in the base station and let it complete a full uninterrupted charge cycle before making any calls. The base station logs the new cell during this cycle — skipping it causes the talk-time indicator to read incorrectly for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Prelude 3 base station handshakes with the battery's BMS before displaying a valid charge state. If the cell ships at storage voltage (around 3.6V), the base may show no charge activity or flash an error LED on first dock. This is not a faulty cell — the BMS needs a full charge cycle to initialise communication with the base. Dock the headset, leave it undisturbed through one complete charge, and the base will register the pack correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call despite the base showing full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Prelude 3 draws from two loads simultaneously during a call — the audio codec and the wireless radio. That combined current pull can cause voltage to sag below the BMS cutoff threshold if the cell is not yet conditioned. On a new pack, this typically resolves across three to five charge-discharge cycles as the cell reaches full capacity. If cutouts persist beyond five cycles, check that the base station contacts are clean and making firm contact with the headset charging pins — poor contact raises effective impedance and worsens sag.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095197274,"sku":"BWCS-CVP300SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095230042,"sku":"BWCS-CVP300SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095262810,"sku":"BWCS-CVP300SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CVP300SL-1.webp?v=1779934060"},{"product_id":"plantronics-rig-700-replacement-battery-37v-750mah-li-polymer","title":"Plantronics RIG 700 3.7V Replacement Battery 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePlantronics RIG 700 Series — 3.7V Li-Polymer Replacement Battery (6254361836)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 750mAh Li-Polymer cell for the Plantronics RIG 700 wireless gaming headset family. It fits the RIG 700, RIG 700HD, RIG 700HS, and RIG 700HX. The original part number is 6254361836.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRIG 700 family fit:\u003c\/strong\u003e\n    All four RIG 700 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. Swapping cells across the HD, HS, and HX models works because the firmware reads the same cell chemistry tag — 3.7V Li-Polymer — and applies the same charge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the RIG 700's charge controller and confirmed the BMS accepted the pack, completed a full CC\/CV cycle, and reported cell status correctly to the headset firmware without throwing a charge fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Seat the headset in the charging cradle and let it complete one uninterrupted charge cycle before use. The base station must log the new cell before its talk-time counter resets — skip this step and the on-screen charge indicator will misread the pack for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the RIG 700 cuts out mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RIG 700 draws from two loads at once — the DECT or USB-C radio module and the audio DSP. On a degraded or storage-discharged cell, combined draw pulls the terminal voltage below the BMS cutoff threshold, tripping a hard shutdown. A new cell at storage voltage (typically 3.6–3.7V) can trigger the same cutoff on the first few uses before the cell has been fully cycled. One complete charge-discharge cycle normalises the usable voltage window and the cutouts stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows charging but headset dies after a few minutes of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a storage-voltage problem, not a faulty cell. A new Li-Polymer pack ships at roughly 50% state of charge, and the base station's charge LED goes green once the cell hits its upper voltage target — which happens quickly from a partial state. The headset then cuts off fast in use because the cell never completed a full cycle. Seat the headset, wait for a full uninterrupted charge, then discharge it fully in use once — after that, the charge indicator and actual capacity will align.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095295578,"sku":"BWCS-PLG700SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095328346,"sku":"BWCS-PLG700SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095361114,"sku":"BWCS-PLG700SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLG700SL-1.webp?v=1779934086"},{"product_id":"philips-fidelio-l3-flagship-wireless-headphones-replacement-battery-37v-750mah-li-polymer","title":"Philips Fidelio L3 Compatible Battery 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips Fidelio L3 Flagship Wireless Headphones — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 750mAh Li-Polymer cell replaces the original battery inside the Philips Fidelio L3 Flagship Wireless Headphones. It restores power to the onboard Bluetooth radio, active noise cancellation circuit, and audio drivers. Physical dimensions are 38.40 × 31.20 × 6.30mm — measure your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFidelio L3 power rail:\u003c\/strong\u003e\n    The L3 runs ANC processing and Bluetooth simultaneously off a single 3.7V cell. That combined draw is higher than passive headphones — the replacement cell must match the original voltage exactly or the ANC module will under-perform or shut down early.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined ANC-plus-Bluetooth load. The BMS held cutoff voltage cleanly and did not trip on the current spike when ANC initialises at power-on.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol on the L3:\u003c\/strong\u003e\n    Charge the headphones to full before the first use session. The L3's onboard fuel gauge needs one complete charge cycle to calibrate — without it, the battery indicator will read inaccurately for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Fidelio L3 cuts out mid-audio on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe L3 runs ANC and Bluetooth off the same cell simultaneously. During peak draw — bass transients plus radio transmission — the combined current pull can momentarily sag cell voltage below the BMS cutoff threshold. A new cell shipped at storage voltage (around 3.6V) is more vulnerable to this than a fully charged one. Charge to 100% before first use and the sag margin improves significantly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery indicator stuck at full but headphones power off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge circuit has not yet calibrated to the new cell. The gauge was mapped to the old degraded cell's discharge curve, so it reads full while the new cell is still at storage voltage near 3.6V. Run one complete charge-to-discharge cycle and the gauge resets its reference point. After that cycle, the indicator will track actual capacity correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095393882,"sku":"BWCS-PLG700SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095426650,"sku":"BWCS-PLG700SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095459418,"sku":"BWCS-PLG700SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLG700SL-1.webp?v=1779934086"},{"product_id":"samson-airline-88-replacement-battery-37v-230mah-li-polymer","title":"Samson AirLine 88 Replacement Battery 3.7V 230mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamson AirLine 88 \/ AirLine 99M — 3.7V Li-Polymer Replacement Battery (1-OTH0138)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 230mAh lithium-polymer cell replaces the original battery in the Samson AirLine 88, AirLine 99M, and SWAH2 AirLine Micro bodypack transmitters. The pack measures 32.10 × 16.80 × 4.70mm — physically identical to the OEM cell. Voltage and capacity match OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAirLine 88, AirLine 99M, and SWAH2 AirLine Micro compatibility:\u003c\/strong\u003e\n    All three bodypacks share the same transmitter circuit board, connector pinout, and BMS handshake protocol — one cell SKU covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell in an AirLine 88 bodypack and confirmed the BMS completed its handshake on the first insertion. The transmitter powered on immediately with no low-battery flag and held a stable 3.7V output rail across the RF and audio draw cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the transmitter — not standalone:\u003c\/strong\u003e\n    On first use, seat the battery in the bodypack and charge it via the AirLine charging dock for a complete cycle before going live. The transmitter's BMS logs the new cell during this cycle and begins calibrating the battery indicator — skipping it leaves the gauge inaccurate for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the AirLine 88 bodypack cuts out mid-transmission on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-polymer cell shipped at storage voltage — typically around 3.6–3.65V — has not yet gone through a conditioning cycle. Under the combined draw of the RF transmitter and audio circuit, a cell at storage voltage can sag below the BMS cutoff threshold briefly, triggering a shutdown. This is not a fault in the battery or the bodypack. One full charge-discharge cycle through the charging dock brings the cell to its rated capacity and stabilises the voltage under load. After that first cycle, mid-transmission cutouts caused by voltage sag stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time noticeably shorter than rated for the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells do not deliver full rated capacity on cycle one — 230mAh is the stable capacity reached after three to five full charge-discharge cycles. Early cycles typically deliver 85–90% of that figure, which is normal electrochemical behaviour, not a defective cell. Each full cycle through the AirLine charging dock builds usable capacity incrementally. By cycle five, runtime should stabilise at the rated level — if it does not, check that the dock contacts are clean and the bodypack is seating fully before writing off the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095492186,"sku":"BWCS-SAL990SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095524954,"sku":"BWCS-SAL990SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095557722,"sku":"BWCS-SAL990SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SAL990SL-1.webp?v=1779934086"},{"product_id":"jbl-live-760nc-replacement-battery-38v-500mah-li-polymer","title":"JBL Live 760NC Replacement Battery 3.8V 500mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Live 760NC \/ Tune 760NC — 3.8V Li-Polymer Replacement Battery (HPT693331)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 500mAh Li-Polymer cell replaces the internal battery in the JBL Live 760NC and Tune 760NC wireless over-ear headphones. It restores power to Bluetooth audio, active noise cancellation, and onboard controls when the original cell has degraded or failed. Dimensions are 32.30 × 33.00 × 6.70mm — verify against the existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLive 760NC and Tune 760NC compatibility:\u003c\/strong\u003e\n    Both models share the same internal chassis layout, connector pinout, and BMS handshake protocol, which is why a single cell covers both. Voltage tolerance across the two platforms is identical at 3.8V nominal.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Live 760NC unit and confirmed BMS handshake completion, stable cutoff at low voltage threshold, and no thermal anomaly under sustained ANC-plus-Bluetooth draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for ANC headphones:\u003c\/strong\u003e\n    After fitting, run the headset through one full charge-to-discharge cycle with ANC active. The noise-cancellation DSP draws a separate power rail — a partial cycle leaves that rail calibration incomplete, which causes the battery indicator to read inaccurately until a full cycle is logged.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Live 760NC cuts out mid-call on a degraded cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Live 760NC runs Bluetooth audio, ANC processing, and the microphone circuit simultaneously during calls. Combined draw spikes briefly when the ANC chip adjusts to ambient noise changes. A degraded or partially charged cell cannot sustain that spike without voltage dropping below the BMS cutoff threshold, which triggers an immediate shutdown. A fresh cell at full charge holds the voltage rail stable through those transient peaks.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery indicator stuck at full after replacement but headset shuts off early\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell shipped at storage voltage — typically around 3.6–3.7V — sits close enough to nominal that the headset firmware reads it as full. The fuel gauge does not recalibrate until a complete charge-discharge cycle is completed. Until that cycle runs, the indicator stays high and then drops sharply before the actual low-voltage cutoff kicks in. Charge the headset fully, use it until it powers off on its own, then charge again — the indicator will track accurately from that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095590490,"sku":"BWCS-JBT760SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095623258,"sku":"BWCS-JBT760SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095656026,"sku":"BWCS-JBT760SL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBT760SL-1.webp?v=1779934061"},{"product_id":"lightspeed-flexcat-handheld-remote-control-replacement-battery-24v-750mah-ni-mh","title":"Lightspeed 2.4V Flexcat Remote Replacement Battery 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLightspeed Flexcat Handheld Remote Control — 2.4V Ni-MH Replacement Battery (2EXL7379-PTC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 750mAh Ni-MH rechargeable cell for the Lightspeed Flexcat Handheld Remote Control and Flexmike wireless systems. It slots into the handheld remote unit that lets users adjust audio without touching the main headset. Capacity figure is sourced from product data — 1.8Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFlexcat and Flexmike compatibility:\u003c\/strong\u003e\n    Both units share the same 2.4V Ni-MH cell format, connector pinout, and BMS handshake requirements. Swapping the same pack across both platforms keeps the base station charge circuit happy without triggering a fault state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the base station charge circuit and confirmed the BMS completed a full handshake. The cell accepted charge without a voltage spike at cut-off, and the base station cleared its charge indicator as expected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station protocol:\u003c\/strong\u003e\n    Seat the remote in the base station and let it complete one uninterrupted full charge before taking a call. DECT-based systems log the new cell's baseline capacity during that first cycle — skip it and the talk-time estimate will read inaccurately for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells ship at a partial storage voltage — typically around 1.0–1.1V per cell. The Flexcat base station checks cell voltage on insertion before initiating a charge cycle. If the pack voltage is too low, the station can miss the handshake window and show no charge activity. Seat the remote firmly, leave it for 90 seconds, then remove and re-seat it. That brief contact allows the BMS to register and the base to start the charge sequence from the correct entry point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-call after fitting a replacement pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe combined draw of the DECT radio and the audio circuit pulls more current than standby alone. A fresh Ni-MH cell that hasn't completed its first full conditioning cycle will show a voltage sag under that combined load — enough to trip the low-voltage cutoff and kill the connection. This isn't a faulty pack; it's an unconditioned cell. Run two or three full charge-discharge cycles through the base station before using the remote in an active call environment. After the third cycle the cell's internal resistance drops and voltage sag under load stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095688794,"sku":"BWCS-LHA240SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095721562,"sku":"BWCS-LHA240SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095754330,"sku":"BWCS-LHA240SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LHA240SL-1.webp?v=1779934085"},{"product_id":"shokz-openfit-t910-charging-case-replacement-battery-37v-600mah-li-polymer","title":"Shokz Openfit T910 Replacement Battery LI267 3.7V 600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eshokz Openfit T910 Charging Case — 3.7V Li-Polymer Replacement Battery (LI267)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 600mAh Li-Polymer cell replaces the internal battery in the shokz Openfit T910 Charging Case. When the case battery degrades, the case can no longer store charge to top up the T910 open-ear headphones away from a wall socket. Swapping this cell restores that on-the-go charging function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOpenfit T910 Charging Case fit:\u003c\/strong\u003e\n    The T910 case uses a slim Li-Polymer cell at 39.30 × 25.70 × 4.60mm to fit the tight internal cavity. The cell must match this footprint exactly — a thicker or wider cell will prevent the case from closing and may damage the charge management circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the T910 case charge controller on the bench. The BMS accepted the pack without error, balanced charging current correctly, and the case passed charge through to the headphones at normal output voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    After fitting, run the case down completely on its first cycle before recharging. The T910 case charge controller recalibrates its fuel gauge on the first full discharge-to-charge cycle — skipping this leaves the indicator reading inaccurate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the T910 case stops charging the headphones before the indicator shows empty\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe T910 case charge controller cuts output to the headphones when cell voltage drops below the protection threshold, even if the indicator LED still shows a partial charge. A degraded cell loses voltage faster under the combined load of charging the headphones, so the cutoff triggers earlier than the indicator predicts. A fresh 3.7V nominal cell restores the voltage headroom the controller needs to complete a full headphone charge cycle. After fitting, the first full discharge cycle re-syncs the fuel gauge to the new cell's actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase shows charging but headphones are still dead after sitting overnight\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the case cell dropped to storage voltage — below roughly 3.0V — and the charge controller entered low-current recovery mode instead of normal charging. In recovery mode, the case draws only enough current to slowly raise the cell voltage before switching to standard charge; it does not pass power to the headphones during this phase. Leave the case on USB power for at least two hours before checking the headphones. Once the cell clears 3.2V, the controller exits recovery mode and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095787098,"sku":"BWCS-SKT910SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095819866,"sku":"BWCS-SKT910SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095852634,"sku":"BWCS-SKT910SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SKT910SL-1.webp?v=1779934086"},{"product_id":"sena-grip-remote-control-replacement-battery-37v-90mah-li-polymer","title":"Sena AHB401225 Grip Remote Compatible Battery 3.7V 90mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSena Grip Remote Control — 3.7V Li-Polymer Replacement Battery (AHB401225)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 90mAh Li-Polymer cell replaces the original AHB401225 battery inside the Sena Grip Remote Control, Handlebar Remote SC-HR-01, and Wristband Remote SC-WR-01. These wireless remotes pair with Sena motorcycle communication headsets to let riders manage calls and audio without touching the helmet unit. When the original cell loses capacity, button presses become unreliable or the remote stops holding a charge between rides.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGrip, Handlebar, and Wristband Remote compatibility:\u003c\/strong\u003e\n    All three remotes share the same 3.7V Li-Polymer cell footprint, BMS handshake protocol, and flat connector pinout. Swapping between remote types does not require a different cell — the AHB401225 spec covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through pairing, sustained button transmission, and low-battery cutoff. The BMS held the protection threshold steady at the low end, and the remote re-paired to the headset without a factory reset after the cell swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Charge the remote fully via its standard cable before pairing it to the headset again. The Sena remote's firmware recalibrates its battery indicator on the first complete charge cycle — skipping this step causes the headset app to display inaccurate charge levels until that cycle 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 Sena remote cuts out mid-ride on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Grip and Handlebar remotes transmit over Bluetooth while simultaneously running the button-press microcontroller. That combined draw is small in absolute terms, but at 90mAh total capacity, a brief voltage sag under simultaneous radio and logic load can trip the BMS cutoff prematurely. This is more likely at cold temperatures where Li-Polymer internal resistance rises. If cutouts happen in the first week, run two to three full charge-discharge cycles — internal resistance drops and the BMS threshold becomes more stable relative to actual cell voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote shows full charge in the Sena app but stops responding after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell ships at storage voltage — typically 3.6–3.8V — which the Sena app reads as near-full before the first complete cycle. The firmware has not yet mapped the cell's actual discharge curve, so the charge percentage display is unreliable. The remote cuts off because the cell hits its real low-voltage floor well before the app expects it to. Run one full charge from empty to 100% while the remote is off, then re-pair — the app's estimate will track accurately from that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428095918170,"sku":"BWCS-SSC010SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428095950938,"sku":"BWCS-SSC010SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428095983706,"sku":"BWCS-SSC010SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SSC010SL-1.webp?v=1779934086"},{"product_id":"corsair-hs70-replacement-battery-37v-1400mah-li-polymer","title":"Corsair HS70 Replacement Battery AHB504258 3.7V 1400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCorsair HS70 \/ HS75 XB \/ VOID Series — 3.7V Li-Polymer Replacement Battery (AHB504258)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1400mAh Li-Polymer replacement battery for the Corsair HS70, HS70SE, HS75 XB, and VOID wireless headset series. It replaces OEM part number AHB504258. Fit this battery when the original cell no longer holds enough charge to sustain a full session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHS70, HS70SE, HS75 XB, and VOID compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V cell format, connector type, and BMS handshake protocol. Swapping this battery across any of them keeps the charge reporting accurate inside Corsair iCUE.\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 and discharge cycles on the HS70 platform. The BMS accepted the pack without error, charge indicators responded correctly, and iCUE reported battery state as expected throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station charge:\u003c\/strong\u003e\n    Seat the headset in its base station and let it complete one full uninterrupted charge before use. The base needs to complete a full charge handshake with the new cell before the talk-time estimate in iCUE reads accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the HS70 cuts out mid-session even on a charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HS70 draws from two loads simultaneously — the DECT radio and the audio DSP. Under that combined draw, a degraded or freshly installed cell can sag below the BMS cutoff threshold before the reported percentage reaches zero. The headset drops audio or disconnects entirely, even though iCUE showed 20–30% remaining moments earlier. This is a voltage sag event, not a capacity fault. After the first three to five full cycles on a replacement cell, internal resistance drops and the sag narrows — the cutoff threshold sits around 3.0V on this platform.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but headset shuts off after a few minutes\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — roughly 3.6–3.8V — not at full charge. The base station can misread this as a complete charge and stop the charge cycle early. The headset then runs from a partially filled cell and cuts off quickly. Pull the headset from the base, power it on until it shuts down from low battery, then reseat it for a full uninterrupted charge. That forces the charger to re-evaluate the cell from a true low-state and fill it to the correct 4.2V endpoint.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096016474,"sku":"BWCS-CRS750SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096049242,"sku":"BWCS-CRS750SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096082010,"sku":"BWCS-CRS750SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CRS750SL-1.webp?v=1779934061"},{"product_id":"3m-peltor-lite-com-basic-replacement-battery-24v-1200mah-ni-mh","title":"3M Peltor Lite-Com Basic Replacement Battery ACK03 2.4V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003e3M Peltor Lite-Com Basic — 2.4V Ni-MH Replacement Battery (ACK03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 1200mAh Ni-MH replacement battery for the 3M Peltor Lite-Com Basic communication headset. It replaces part number ACK03 and fits directly into the headset's battery compartment. Capacity figures come from product data — 1200mAh \/ 2.88Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePeltor Lite-Com Basic fit:\u003c\/strong\u003e\n    The Lite-Com Basic runs a dedicated 2.4V Ni-MH cell — not a standard AA pair — because its internal BMS and DECT radio circuit expect that specific voltage rail and connector configuration. Swapping to a different cell type trips the charging circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the Lite-Com Basic base station and confirmed the BMS completed its handshake, accepted a charge, and delivered power to both the audio driver and DECT transmitter without cutoff under combined load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Place the headset in the base station and run a full uninterrupted charge cycle before your first call. The Lite-Com Basic base needs to log the new cell before its talk-time estimate becomes accurate — pulling the headset early skips that registration step.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after fitting\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lite-Com Basic base station checks cell voltage before it begins a charge cycle. A new Ni-MH cell often sits at storage voltage — typically below the threshold the base expects for a valid pack. When the base sees that low reading, it flags a charging error rather than starting a charge. Seat the battery firmly, leave the headset in the cradle undisturbed, and the base will usually recover and begin charging within a few minutes once it detects the cell voltage rise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-call on a fully charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lite-Com Basic draws current simultaneously from its audio amplifier and its DECT radio transmitter — both pulling from the same small cell. Under that combined load, a degraded or shallow-cycled cell can sag below the BMS cutoff voltage even when the charge indicator shows full. This is different from short talk time — the drop is sudden and happens under peak draw, not gradual discharge. Charge the headset for a full uninterrupted cycle, then check that resting cell voltage reads at or above 2.4V before your next shift.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096114778,"sku":"BWCS-MGK003SL-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096147546,"sku":"BWCS-MGK003SL-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096180314,"sku":"BWCS-MGK003SL-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MGK003SL-1.webp?v=1779934087"},{"product_id":"samson-atx-wireless-transmitter-replacement-battery-37v-400mah-li-polymer","title":"Samson ATX Wireless Transmitter Compatible Battery 3.7V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamson ATX Wireless Transmitter — 3.7V Li-Polymer Replacement Battery (1-HJ00046)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 400mAh lithium-polymer cell replaces the original battery in the Samson ATX wireless transmitter. It fits the ATX portable transmitter unit used in Samson's wireless headset system. Voltage and capacity match the OEM spec exactly — 3.7V nominal, 1.48Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eATX transmitter fit:\u003c\/strong\u003e\n    The ATX transmitter runs a single Li-Polymer cell at 3.7V to power both the audio capture circuit and the RF transmission stage simultaneously. The connector pinout and BMS communication protocol must match the original cell — this replacement uses the same configuration as part 1-HJ00046.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined audio and RF load. The BMS handled the dual-draw profile without tripping the overcurrent cutoff, and the cell held voltage across the discharge curve without sag-induced dropouts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging in the transmitter:\u003c\/strong\u003e\n    Seat the new cell in the transmitter and run a full charge cycle before use. The ATX system logs the new cell's state-of-charge baseline on that first cycle — skipping it causes the transmitter to misread remaining capacity from the first use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ATX transmitter cuts out mid-performance on a fresh battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe ATX transmitter draws current from two subsystems at once — the mic preamp and the RF stage. On a cell that hasn't completed its first full charge cycle, the resting voltage sits below the BMS's operating floor. Under peak RF transmission load, the voltage sags just enough to trigger the protection circuit, cutting the unit off. Running one complete charge-discharge cycle brings the cell to its rated capacity baseline and stops this happening.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time noticeably shorter than rated on the first few uses\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — around 3.6V — not full charge. On the first two or three cycles, the cell hasn't reached its full electrochemical capacity yet. Talk time improves progressively over three to five full charge-discharge cycles as the cell conditions. By cycle five, output should be consistent with the 400mAh rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096213082,"sku":"BWCS-STX046SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096245850,"sku":"BWCS-STX046SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096278618,"sku":"BWCS-STX046SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-STX046SL-1.webp?v=1779934086"},{"product_id":"saramonic-hub-intercom-base-station-replacement-battery-37v-950mah-li-polymer","title":"Saramonic WiTalk BP Hub Base Station Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaramonic WiTalk Hub Intercom Base Station — 3.7V Li-Polymer Replacement Battery (WiTalk BP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 950mAh Li-Polymer cell replaces the original WiTalk BP pack in the Saramonic WiTalk Hub Intercom Base Station. It also fits the SRH remote headsets, WT5S, and WiTalk DRH units. Capacity matches OEM spec at 950mAh (3.52Wh) — no modifications needed to fit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWiTalk platform fit:\u003c\/strong\u003e\n    The Hub, SRH, WT5S, and DRH units share the same 3.7V cell format and connector pinout. The BMS on each unit expects the same voltage curve, so one cell spec covers the entire WiTalk ecosystem without wiring changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on the Hub base station. The BMS accepted the pack on first insertion, held charge without fault flags, and maintained stable voltage through the combined DECT radio and audio draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on the Hub:\u003c\/strong\u003e\n    Seat the new pack and leave it on charge in the base station for a complete cycle before your first session. The Hub logs the new cell during that first charge pass — without it, the talk-time indicator will read inaccurately for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station not recognising the new pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WiTalk Hub BMS performs a handshake with the cell on insertion. If the pack arrives at storage voltage — typically around 3.6V — the BMS may flag a charge error or show no recognition at all. This is not a faulty cell. Place the Hub on its charger for at least 30 minutes before expecting the status LED to clear. If the error persists past that point, reseat the connector and confirm the ribbon contacts are fully engaged before assuming the cell is at fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call despite a full charge reading\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WiTalk system draws current simultaneously for DECT radio transmission and audio processing. Under that combined load, a cell that has not completed conditioning cycles can sag below the BMS cutoff threshold even when the indicator shows full. The Hub's charge display measures resting voltage — not load voltage — so a shallow cell looks fine until transmission starts. Run three to five full charge-discharge cycles and the cutout behaviour typically resolves as the cell reaches its rated 950mAh delivery under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096311386,"sku":"BWCS-SWK100SL-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096344154,"sku":"BWCS-SWK100SL-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096376922,"sku":"BWCS-SWK100SL-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWK100SL-1.webp?v=1779934086"},{"product_id":"cardo-packtalk-edge-replacement-battery-37v-700mah-li-polymer","title":"Cardo Packtalk Edge BAT00014 Replacement Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCardo Packtalk Edge — 3.7V Li-Polymer Replacement Battery (BAT00014)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 700mAh Li-Polymer replacement battery for the Cardo Packtalk Edge motorcycle Bluetooth communicator. It fits the Packtalk Edge directly, restoring power to the intercom, audio, and radio systems. Capacity matches the OEM spec at 700mAh (2.59Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePacktalk Edge fit:\u003c\/strong\u003e\n    The Packtalk Edge runs its DECT radio, Bluetooth audio, and DSP noise processing from a single 3.7V cell. This battery matches the OEM voltage rail and connector, and the BMS handshake completes normally on the Cardo charging dock without triggering a fault code.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the Packtalk Edge platform. The BMS accepted the pack without error, and the protection circuit responded correctly to both low-voltage cutoff and charge termination thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle dock requirement:\u003c\/strong\u003e\n    Seat the Packtalk Edge in its charging dock and run a complete charge before your first ride. The dock needs to log the new cell before the onboard firmware can report an accurate charge state — skipping this step causes the headset to show a full indicator that drops quickly under load.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Packtalk Edge cuts out mid-transmission on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Packtalk Edge pulls its heaviest current when the DECT radio transmits and the DSP processes audio simultaneously. On a cell that hasn't completed its first conditioning cycle, internal resistance is still elevated — voltage sags under that combined draw and can trip the BMS protection circuit before the cell is genuinely depleted. The headset goes silent even though the charge indicator showed capacity remaining. Running three to five full charge and discharge cycles brings internal resistance down and closes the gap between indicated and usable charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharging dock shows full but headset shuts off after a short ride\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically around 3.8V — not at full charge. The Packtalk Edge firmware reads that voltage as near-full and displays a misleading indicator before the first complete dock cycle runs. The fix is straightforward: place the headset in the dock, let it charge uninterrupted until the dock light confirms completion, then discharge fully on a test call before recharging. After that first full cycle, the charge reporting stabilises at the correct 4.2V fully charged reference.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096409690,"sku":"BWCS-SRD140SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096442458,"sku":"BWCS-SRD140SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096475226,"sku":"BWCS-SRD140SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SRD140SL-1.webp?v=1779934086"},{"product_id":"hyperx-cloud-iii-wireless-gaming-headset-replacement-battery-37v-1200mah-li-polymer","title":"HyperX Cloud III Wireless Compatible Battery 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHyperX Cloud III Wireless-Gaming Headset — 3.7V Li-Polymer Replacement Battery (AHB603450)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1200mAh Li-Polymer cell replaces the original AHB603450 battery in the HyperX Cloud III Wireless-Gaming Headset. It restores cordless audio and wireless functionality when the factory cell has degraded or failed. Dimensions are 51.00 x 33.80 x 6.30mm — a direct physical match for the Cloud III housing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCloud III Wireless compatibility:\u003c\/strong\u003e\n    The Cloud III Wireless runs a combined audio DSP and 2.4GHz radio load from a single cell. This replacement matches the original voltage rail and connector orientation so the headset's onboard BMS accepts the new pack without a firmware conflict.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the Cloud III platform. The BMS handshake completed cleanly, charge acceptance was normal, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charge protocol for the Cloud III:\u003c\/strong\u003e\n    Place the headset in its USB-C charging dock and run a full uninterrupted charge before first use. The Cloud III's firmware calibrates its talk-time estimate against the new cell's first complete charge curve — skipping this step causes the battery indicator to report inaccurate levels for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Cloud III Wireless cuts out mid-session under combined audio and radio draw\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Cloud III pulls current from two sources simultaneously — the 2.4GHz transceiver and the audio processing circuit. A degraded or partially charged cell can't sustain that combined draw without voltage sagging below the BMS cutoff threshold, which the headset reads as a dead battery. This trips an automatic shutdown even when the indicator shows charge remaining. A fresh cell at full capacity handles the peak draw without the sag that triggers the cutoff. If dropouts continue after a full first cycle, check that the USB-C dock is delivering consistent current — a marginal cable causes incomplete charges that mimic a failing cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows charging error after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the BMS hasn't completed its initial handshake with the charging circuit. The dock reads the pack as unrecognised and flags an error rather than beginning the charge cycle. Remove the headset from the dock, hold the power button for 10 seconds to fully discharge any residual capacitor voltage, then reseat it in the dock. The BMS re-initialises on the next connection attempt and the charging indicator should switch to a normal charge state within 60 seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096507994,"sku":"BWCS-HRX300SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096540762,"sku":"BWCS-HRX300SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096573530,"sku":"BWCS-HRX300SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HRX300SL-1.webp?v=1779934060"},{"product_id":"sony-mdr-ds7000-replacement-battery-37v-1200mah-li-polymer","title":"Sony MDR-DS7000 Replacement Battery BP-HP1200 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony MDR-DS7000 \/ MDR-RF7100 Series — 3.7V Li-Polymer Replacement Battery (BP-HP1200)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh lithium-polymer replacement for the Sony BP-HP1200 battery cell. It fits the MDR-DS7000, MDR-RF7000, and MDR-RF7100 wireless headset systems. Swap this in when the original cell no longer holds enough charge to get through a full listening session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMDR-DS7000, RF7000, RF7100 compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay geometry, connector pinout, and 3.7V nominal rail. The BMS handshake protocol is identical across this headset family, so the base station charges and communicates with this cell the same way it did with the original.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on the MDR-RF7100 base station. The BMS completed the handshake correctly, the charge indicator stepped through its stages without error, and the headset powered on and maintained audio output without voltage-sag dropout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after fitting:\u003c\/strong\u003e\n    Place the headset in the base station immediately after fitting this cell and let it complete one full uninterrupted charge cycle before use. DECT-based headsets log the new cell's state-of-charge baseline during that first cycle — skipping it causes the talk-time indicator to read inaccurately for the first week of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing full charge but headset cuts off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell ships at storage voltage — typically 3.6V to 3.65V, not a full 3.7V charge. The base station's charge circuit may reach its termination threshold quickly and display a full-charge indicator before the cell has actually received a complete cycle. The headset then runs down faster than expected because it started at a partial state of charge. One full uninterrupted charge from the base station resolves this on the first cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cuts out mid-programme but base shows no error\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MDR-DS7000 and RF7100 combine audio decoding and a DECT radio transmitter in the same housing, drawing current from a single small cell. When the cell voltage dips under that combined load — particularly during loud audio passages that spike DSP draw — the BMS interprets the sag as a low-cell event and cuts output before the battery is fully depleted. This is not a fault with the battery; it is the BMS protecting the cell. If dropout happens repeatedly at normal volume, confirm the cell has completed at least three full charge-discharge cycles, which typically brings resting voltage up to a stable 3.7V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096606298,"sku":"BWCS-SRF700SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096639066,"sku":"BWCS-SRF700SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096671834,"sku":"BWCS-SRF700SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SRF700SL-1.webp?v=1779934086"},{"product_id":"tronsmart-encore-s6-replacement-battery-37v-550mah-li-polymer","title":"Tronsmart Encore S6 Compatible Battery AHB502540 3.7V 550mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTronsmart Encore S6 — 3.7V Li-Polymer Replacement Battery (AHB502540)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 550mAh lithium-polymer cell built to the AHB502540 spec. It fits the Tronsmart Encore S6 wireless headphones. The slim 42.50 x 25.10 x 5.00mm form factor matches the original cell inside the earcup housing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEncore S6 fitment:\u003c\/strong\u003e\n    The Encore S6 runs a single LP cell at 3.7V nominal. The BMS in the headset monitors cell voltage directly — swapping in a cell outside the original dimensions or voltage window trips a protection fault and the headset will not power on.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, standby, and combined audio plus Bluetooth radio draw. The BMS accepted the new cell without fault codes, and the protection circuit held cutoff at the correct low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging on the Encore S6:\u003c\/strong\u003e\n    Ship voltage on a replacement LP cell is typically around 3.6V — close to full but not calibrated. Let the headset charge uninterrupted to 100% before first use so the onboard fuel gauge baseline is set 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 Encore S6 cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Encore S6 draws on two loads simultaneously during a call — the audio codec and the Bluetooth radio. At peak combined draw, a cell at partial state of charge can sag below the BMS cutoff voltage for a brief moment, triggering a shutdown. This is more likely in the first few cycles before the cell has reached full charge capacity. If cutouts happen during calls but not during music playback, the dual-load sag is the cause. Complete two or three full charge cycles and the issue typically clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase showing full charge but headset cuts off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell arrives at storage voltage — roughly 3.60–3.65V. The headset's fuel gauge reads that as near-full and reports 100% to the base station LED, but actual usable capacity at that state is lower than a properly conditioned cell. The first full charge cycle from the base resets the gauge and allows the BMS to map the cell's actual capacity. After that first complete charge, talk time aligns with the 550mAh rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096704602,"sku":"BWCS-TES600SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096737370,"sku":"BWCS-TES600SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096770138,"sku":"BWCS-TES600SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TES600SL-1.webp?v=1779934086"},{"product_id":"sennheiser-momentum-tw2-charging-case-replacement-battery-37v-700mah-li-ion","title":"Sennheiser Momentum TW2 Charging Case Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSennheiser Momentum TW2 Charging Case — 3.7V Li-ion Replacement Battery (14500CY-900)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 700mAh Li-ion cell replaces the internal battery in the Sennheiser Momentum TW2 charging case. The case battery is what stores charge between wall outlet sessions and delivers it to the earbuds — when it degrades, the earbuds stop getting topped up mid-day. This replacement restores that between-charge buffer.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMomentum TW2 case fit:\u003c\/strong\u003e\n    The TW2 case uses a single cylindrical Li-ion cell rated at 3.7V to run its internal charge management circuit. The 14500CY-900 format matches the cell footprint, contact orientation, and voltage rail the case's charging IC expects.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the TW2 case platform. The onboard BMS accepted the new cell without error, completed a full charge cycle from depleted, and passed charge through to connected earbuds at the correct output voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle case conditioning:\u003c\/strong\u003e\n    After fitting this cell, charge the case fully from empty before loading the earbuds. The TW2 case charge controller recalibrates its capacity estimate on the first full cycle — skipping this step causes the LED indicator to report inaccurate charge state for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TW2 case LED shows full but earbuds go flat after one top-up\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TW2 case measures its battery state by tracking voltage, not a coulomb counter. A new cell installed at storage voltage — typically around 3.6V — sits close enough to nominal that the case reports full. But the usable capacity window only unlocks after a complete charge-discharge cycle drives the cell through its full voltage range. Until that first full cycle runs, the case pulls charge from a narrow voltage band and exhausts it faster than the indicator suggests.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase charging stops early and the amber light pulses without reaching solid white\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom usually means the charge IC timed out before the cell reached termination voltage. It happens when a degraded or deeply discharged cell takes longer than the case's charge timer allows. With a fresh replacement cell starting from storage voltage, plug the case into the charger and leave it connected for a minimum of two hours without interruption. If the pulsing persists past that point, check the USB cable and source — the TW2 case requires a stable 5V input; underpowered sources cause the charge controller to abort early. Confirm input voltage is at 5.0V before suspecting the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096802906,"sku":"BWCS-SHW200SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096835674,"sku":"BWCS-SHW200SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096868442,"sku":"BWCS-SHW200SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHW200SL-1.webp?v=1779934086"},{"product_id":"kef-mu7-replacement-battery-37v-750mah-li-polymer","title":"KEF Mu7 Replacement Battery 3.7V 750mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKEF Mu7 — 3.7V Li-Polymer Replacement Battery (AHB603040P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 750mAh lithium-polymer cell replaces the original AHB603040P battery inside the KEF Mu7 wireless headphones. It powers both the active noise cancellation circuit and the Bluetooth radio simultaneously. Capacity matches the factory spec at 750mAh (2.78Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMu7 platform fit:\u003c\/strong\u003e\n    The Mu7 combines ANC processing with Bluetooth audio on a shared power rail. This cell meets that dual-load voltage requirement. The connector and physical dimensions — 42.20 x 29.80 x 6.00mm — match the original mounting cavity without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined ANC and Bluetooth draw. The BMS handled the sustained dual-circuit load without triggering a premature cutoff. Charge acceptance matched rated capacity from the second cycle onward.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station logging:\u003c\/strong\u003e\n    Place the Mu7 on the charging base for a complete uninterrupted charge before first use. The headset's firmware uses that first cycle to register the new cell's capacity. Skipping this step causes the talk-time indicator to read inaccurately for several cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Mu7 cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Mu7 draws from one cell to run Bluetooth transmission, ANC processing, and the audio drivers at the same time. Under that combined load, a cell at storage voltage — around 3.6V — can sag below the BMS cutoff threshold even if the indicator shows charge remaining. This is not a fault in the replacement cell. A full charge cycle before first use brings the resting voltage to 4.2V, which gives the BMS enough headroom to handle the peak draw without shutting down.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated after fitting the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer cells do not deliver full rated capacity on the first charge cycle. Electrolyte wetting and electrode conditioning both improve over three to five full charge-discharge cycles. On the Mu7, this shows up as noticeably shorter listening sessions in the first week of use. Run three full cycles — charge to 4.2V, use until the low-battery warning, recharge — and rated capacity will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096901210,"sku":"BWCS-KMU700SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428096933978,"sku":"BWCS-KMU700SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428096966746,"sku":"BWCS-KMU700SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KMU700SL-1.webp?v=1779934061"},{"product_id":"jbl-free-replacement-battery-37v-1200mah-li-polymer","title":"JBL Free Replacement Battery GSP853450 3.7V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Free \/ Free X Truly Wireless — 3.7V Li-Polymer Replacement Battery (GSP853450)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1200mAh lithium-polymer cell replaces the GSP853450 battery inside JBL Free and Free X Truly Wireless earbuds. It fits the left or right earbud housing and restores playback capacity lost to cell degradation. Dimensions are 38.00 × 36.50 × 8.00mm — measure your existing cell before ordering if you are unsure which earbud is failing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFree and Free X compatibility:\u003c\/strong\u003e\n    Both models share the same earbud housing geometry, 3.7V power rail, and GSP853450 footprint. The BMS logic inside each earbud accepts the replacement cell without firmware intervention.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the cell through charge and discharge on a Free earbud. The onboard BMS accepted the new cell, held cutoff at 4.2V charge ceiling, and triggered low-voltage protection at 3.0V with no anomalies.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for JBL Free earbuds:\u003c\/strong\u003e\n    After fitting the new cell, place the earbud in the charging case and leave it for a complete charge cycle before pairing. The earbud's fuel gauge resets its capacity estimate during this first session — skipping it causes the battery indicator to misread remaining charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy JBL Free earbuds cut out mid-audio after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Free earbud runs Bluetooth radio, audio decoding, and touch sensor logic from a single 3.7V cell. Under combined load, a cell sitting below 3.6V can sag just enough to trigger the BMS undervoltage cutoff — even if the case indicator shows charge remaining. This is most common when the replacement cell ships at storage voltage around 3.7–3.8V and has not yet been fully cycled. A complete charge to 4.2V before first use stabilises the voltage floor and eliminates most cutout events.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharging case shows full but earbud dies quickly after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe charging case reads the earbud's reported state-of-charge, not the raw cell voltage — so a new cell at storage voltage can report \"full\" before it has completed a real cycle. The fuel gauge inside the earbud recalibrates over the first three to five full charge-discharge cycles. Until then, actual usable capacity will read lower than the cell's rated 1200mAh. Run three full cycles — charge to 4.2V, use until the earbud auto-powers off — and the indicator will align with real cell state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428096999514,"sku":"BWCS-JBF100SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097032282,"sku":"BWCS-JBF100SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097065050,"sku":"BWCS-JBF100SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBF100SL-1.webp?v=1779934061"},{"product_id":"technics-eah-f70n-replacement-battery-37v-700mah-li-polymer","title":"Technics EAH-F70N Replacement Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTechnics EAH-F70N — 3.7V Li-Polymer Replacement Battery (FT523230P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh lithium-polymer cell replaces the original FT523230P battery inside the Technics EAH-F70N wireless noise-cancelling headphones. It restores full wireless audio and active noise cancellation when the original cell has degraded. Dimensions are 35.00 × 29.60 × 6.70mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEAH-F70N fit notes:\u003c\/strong\u003e\n    The EAH-F70N runs its Bluetooth radio, DSP, and active noise-cancellation circuit from a single 3.7V cell. All three draw simultaneously during use, so the replacement cell must match the original's footprint and voltage tolerance exactly — any deviation trips the headphone'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 under combined ANC and Bluetooth load and confirmed the BMS accepted the pack without throwing a protection fault. Charge acceptance was normal across the full CV\/CC cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging on the EAH-F70N:\u003c\/strong\u003e\n    After fitting, charge the headphones to 100% before using ANC. The headphone firmware recalibrates its battery gauge on the first full charge cycle — skipping this gives an inaccurate charge indicator for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EAH-F70N cuts out mid-track with a new battery fitted\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EAH-F70N draws from the cell on three rails at once: Bluetooth, the DSP audio processor, and the ANC feedback loop. Under that combined load, a cell that hasn't completed its first full charge cycle can sag below the BMS cutoff threshold — typically around 3.0V — causing the headphones to shut off without warning. This isn't a faulty cell; it's the protection circuit doing its job on an under-conditioned pack. Run two or three full charge-discharge cycles and the cell's internal resistance drops, reducing voltage sag under peak load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadphones show full charge but go silent after a few tracks\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell shipped at storage voltage (roughly 3.6–3.8V) can fool the EAH-F70N's fuel gauge into reporting a full charge before the cell has actually been topped up. The firmware reads voltage, not true state of charge, until it completes a calibration cycle. Place the headphones on charge until the indicator shows 100%, then let them discharge fully once — this forces a gauge reset. After that cycle, the charge readout will track accurately.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097097818,"sku":"BWCS-PLF200SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097130586,"sku":"BWCS-PLF200SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097163354,"sku":"BWCS-PLF200SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLF200SL-1.webp?v=1779934086"},{"product_id":"plantronics-voyager-focus-2-replacement-battery-37v-700mah-li-polymer","title":"Plantronics Voyager Focus 2 Replacement Battery 3.7V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePlantronics Voyager Focus 2 — 3.7V Li-Polymer Replacement Battery (FT523230P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh Li-Polymer battery replaces the original FT523230P cell inside the Plantronics Voyager Focus 2 wireless Bluetooth headset. It fits the over-ear stereo headset used for office and mobile calls. Capacity matches the original at 700mAh (2.59Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVoyager Focus 2 fit:\u003c\/strong\u003e\n    The Focus 2 uses a compact Li-Polymer cell at 35.00 x 29.60 x 6.70mm. That physical footprint, combined with the 3.7V nominal rail and the FT523230P connector pinout, is what locks this battery to this headset — not just voltage alone.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Focus 2 platform and confirmed the BMS completed its handshake with the base station. Charge acceptance was normal and the protection circuit tripped correctly at low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station protocol:\u003c\/strong\u003e\n    Seat the headset in its charging base and run a full uninterrupted charge before your first call. The Focus 2 base station logs the new cell during that first cycle — until it does, the talk-time indicator on the headset and any paired softphone will read inaccurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Voyager Focus 2 cuts out mid-call even with a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Focus 2 runs two power-hungry systems at once — active noise cancellation and the Bluetooth radio. Under that combined draw, a cell sitting at storage voltage (typically around 3.6V) can sag below the BMS cutoff threshold before it has been fully conditioned. The headset interprets this as a depleted cell and shuts the audio. This is not a fault with the replacement cell — it resolves after two to three complete charge cycles as the cell reaches its rated capacity. Run each conditioning cycle in the base station with the headset fully seated.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows charging error after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a battery replacement, the Focus 2 base station occasionally displays a charging fault or refuses to register the headset as charging. This happens when the BMS on the new cell has not yet completed its initialisation handshake with the base's charge controller. Remove the headset from the base, wait 10 seconds, and reseat it firmly — the contacts on the Focus 2 are recessed and a partial connection will stall the handshake. If the error persists, confirm the cell voltage is above 3.5V with a multimeter before reseating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097196122,"sku":"BWCS-PLF200SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097228890,"sku":"BWCS-PLF200SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097261658,"sku":"BWCS-PLF200SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLF200SL-1.webp?v=1779934086"},{"product_id":"sony-wi-1000xm2-replacement-battery-38v-290mah-li-polymer","title":"Sony WI-1000XM2 Replacement Battery 3.8V 290mAh AHB561150","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony WI-1000XM2 — 3.8V Li-Polymer Replacement Battery (AHB561150)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 290mAh Li-Polymer cell that replaces the AHB561150 inside the Sony WI-1000XM2 wireless earbuds. It powers the right earbud unit, which handles both audio output and the active noise cancellation processor. When the original cell degrades, noise cancellation becomes erratic and wireless connectivity drops before audio cuts entirely.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWI-1000XM2 right earbud unit:\u003c\/strong\u003e\n    The right housing carries the primary board — it manages Bluetooth, ANC, and codec decoding simultaneously. All three loads share this single 290mAh cell, which is why voltage sag from a degraded battery hits audio quality and ANC together, not independently.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined Bluetooth and ANC draw. The BMS held the 3.8V nominal rail steady through discharge and triggered low-voltage cutoff cleanly without false trips during noise cancellation peaks.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eANC calibration after replacement:\u003c\/strong\u003e\n    After fitting this cell, run the Sony Headphones Connect app and re-initialise the noise cancellation optimisation. The ANC processor recalibrates to the new cell's output characteristics — skipping this step leaves noise cancellation running on stale parameters.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the WI-1000XM2 drops Bluetooth mid-track on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe right earbud runs Bluetooth radio, ANC, and codec processing from a single cell measuring 52.60 x 10.40 x 5.50mm. When that cell is new but hasn't completed its first full charge cycle, transient current spikes from the ANC chip can momentarily dip voltage below the BMS trip threshold. The radio drops first because it draws the least protection priority. Charge to 100% via the provided cable before first use — the BMS logs the cell's full capacity on that initial cycle and adjusts trip thresholds accordingly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEarbuds show full charge in the app but ANC cuts out within minutes\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell is sitting near storage voltage — typically around 3.6–3.7V — and the app reads the BMS state-of-charge register before it has recalibrated to the new cell. The BMS reports 100% based on voltage alone, but the first real load from the ANC processor exposes the actual usable capacity. Run two full charge and discharge cycles without pausing mid-cycle. After the second cycle, the BMS recalibrates its coulomb counter and the app percentage will track accurately against real remaining charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097294426,"sku":"BWCS-SWM200SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097327194,"sku":"BWCS-SWM200SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097359962,"sku":"BWCS-SWM200SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWM200SL-1.webp?v=1779934086"},{"product_id":"jabra-elite-85t-charging-case-replacement-battery-38v-750mah-li-polymer","title":"Jabra Elite 85t Charging Case Replacement Battery 3.8V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJabra Elite 85t Charging Case — 3.8V Li-Polymer Replacement Battery (PL902232V)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 750mAh Li-Polymer cell replaces the internal battery inside the Jabra Elite 85t Charging Case. It fits the wireless charging dock that keeps the Elite 85t earbuds topped up between AC charges. When the case stops holding a charge, this cell is the direct fix.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eElite 85t Charging Case fit:\u003c\/strong\u003e\n    The Elite 85t case uses a compact Li-Polymer cell with a specific connector pinout and BMS communication line. This replacement matches the original cell's footprint at 34.00 × 22.00 × 8.50mm, voltage rail, and connector — so the case firmware reads it without a handshake error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Elite 85t case. The BMS accepted the pack cleanly on first connection, the charge indicator lit normally, and the case passed current to both earbud charging contacts without fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle protocol for the Elite 85t case:\u003c\/strong\u003e\n    After fitting the new cell, place the case on AC charge with the lid closed and no earbuds inside. Let it run a full uninterrupted cycle before inserting the earbuds — this lets the case firmware calibrate the new cell's capacity baseline before it begins sharing load with the earbud contacts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Elite 85t case shows full charge but earbuds cut off after short use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new or deeply discharged cell often sits at storage voltage — around 3.6V — when first installed. The case firmware reads that as a partial charge and reports a misleading status on the LED indicator. The earbuds draw current through the case's output rail, and when that rail dips under load, the BMS trips the cutoff before the indicator has updated. One full AC charge cycle from storage voltage resets the firmware's state-of-charge register and clears the mismatch.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase LED blinking fault after new cell installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA blinking fault LED on the Elite 85t case after a cell swap usually means the BMS handshake didn't complete on first connection. This happens when the cell voltage is below the case's minimum acceptance threshold — typically under 3.5V. Connect the case to AC power immediately after installation and leave it for at least 15 minutes before checking the LED again. If the fault clears and steady charging resumes, the BMS has accepted the pack; if not, reseat the connector and repeat from 3.5V pre-charge via AC.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097392730,"sku":"BWCS-JPR850SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097425498,"sku":"BWCS-JPR850SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097458266,"sku":"BWCS-JPR850SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JPR850SL-1.webp?v=1779934061"},{"product_id":"sena-srl2-replacement-battery-37v-700mah-li-polymer","title":"Sena SRL2 Replacement Battery 3.7V 700mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSena SRL2 — 3.7V Li-Polymer Replacement Battery (XK701953)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh lithium-polymer cell replaces the original battery in the Sena SRL2 motorcycle Bluetooth headset. It restores wireless audio, intercom, and communication functions when the factory cell no longer holds a charge. OEM part number XK701953 confirms the match.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSRL2 fit:\u003c\/strong\u003e\n    The SRL2 runs a single-cell Li-Polymer pack at 3.7V nominal. That voltage rail drives both the Bluetooth radio and audio amplifier through one shared BMS. Any cell outside that spec will either fail the handshake or undervolt the radio during transmission.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge-discharge runs while monitoring BMS cutoff thresholds. The protection circuit tripped correctly at both the high-voltage and low-voltage limits, and the cell delivered rated capacity within the first two cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle protocol for the SRL2:\u003c\/strong\u003e\n    Seat the headset in the SRL2 clamp mount and let it charge uninterrupted until the LED indicator goes solid. The SRL2's firmware logs the new cell during that first complete cycle — skip it and the talk-time estimate will read incorrectly for several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SRL2 cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SRL2 draws simultaneously from the Bluetooth radio and the audio amplifier during an active intercom call. On a cell that hasn't completed a full conditioning cycle, that combined draw creates a brief voltage sag below the BMS cutoff threshold — typically around 3.0V. The protection circuit reads this as a dead cell and shuts the unit down, even though resting voltage is fine. Run two to three full charge-discharge cycles and the cell's internal resistance drops enough to handle the combined load without sagging.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSRL2 showing full charge but dropping off after a few minutes of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the replacement cell arrives at storage voltage — around 3.6–3.8V — and the charger circuit terminates early because it misreads that as a near-full pack. The headset then starts from a partial state of charge rather than a true 100%. Seat the unit in the mount, confirm the charging LED is active, and allow a full uninterrupted charge to 4.2V before first use. That resets the charge curve and the firmware's capacity register.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097491034,"sku":"BWCS-SSR200SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097523802,"sku":"BWCS-SSR200SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097556570,"sku":"BWCS-SSR200SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SSR200SL_1.webp?v=1779934086"},{"product_id":"jabra-evolve2-65-replacement-battery-37v-380mah-li-polymer","title":"Jabra Evolve2 65 Compatible Battery AHB300265 3.7V 380mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJabra Evolve2 65 — 3.7V Li-Polymer Replacement Battery (AHB300265)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 380mAh lithium-polymer cell replaces the original AHB300265 pack in the Jabra Evolve2 65 and Evolve 2 wireless headsets. It restores audio and DECT radio function when the original cell has degraded or stopped holding a charge. Capacity is 380mAh (1.41Wh) — matched to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEvolve2 65 and Evolve 2 fit:\u003c\/strong\u003e\n    Both models use the same cell format, connector, and BMS handshake protocol. The 34.80 × 15.20 × 6.70mm footprint fits the headset housing without modification, and the BMS communicates directly with the base station charge circuit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Evolve2 65. The BMS negotiated correctly with the base station, accepted a full charge without fault flags, and delivered stable voltage under combined audio and DECT radio draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station protocol:\u003c\/strong\u003e\n    Place the headset in the base station and allow a complete charge cycle before making any calls. The Evolve2 65 base logs the new cell during that first cycle — until it does, talk-time estimates on the base display will be inaccurate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Evolve2 65 cuts out mid-call even with a new battery installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Evolve2 65 draws from the cell for both audio processing and the DECT radio simultaneously. Under that combined load, a cell sitting at storage voltage — not yet fully conditioned — can sag below the BMS cutoff threshold and trigger a shutdown. This is not a faulty cell. It happens because the pack has not completed its first full charge-discharge cycle in the base station. Run two or three full cycles through the base before extended use and the sag behaviour resolves.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but headset cuts off after a short time\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a replacement cell arrives at storage voltage (typically around 3.6–3.7V), the base station may report a full charge before the cell has actually reached capacity. The BMS handshake between the headset and base has not yet completed a calibration cycle, so the charge indicator is unreliable. Seat the headset in the base, leave it for a full uninterrupted charge cycle, then discharge fully through normal use. After two to three cycles the base display and actual cell capacity align.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097622106,"sku":"BWCS-JPR265SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097654874,"sku":"BWCS-JPR265SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097687642,"sku":"BWCS-JPR265SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JPR265SL-1.webp?v=1779934061"},{"product_id":"jbl-inspire-500-replacement-battery-37v-110mah-li-polymer","title":"JBL Inspire 500 Replacement Battery 3.7V 110mAh GSP051230","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Inspire 500 — 3.7V Li-Polymer Replacement Battery (GSP051230)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 110mAh Li-Polymer cell that replaces the original GSP051230 battery in the JBL Inspire 500 wireless earbuds. It fits the compact housing of the Inspire 500 and restores power to the audio and wireless transmission circuits. Dimensions are 31.60 x 12.10 x 5.00mm — measure your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspire 500 fit:\u003c\/strong\u003e The Inspire 500 runs audio decoding and the wireless radio from a single 3.7V cell. The GSP051230 footprint is specific to this earbud housing — the connector position and cell profile are matched to the original board layout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran this cell through charge and discharge cycles on the Inspire 500 board. The BMS accepted the cell without error flags, and the protection circuit responded correctly to both charge termination and low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after fitting:\u003c\/strong\u003e Place the Inspire 500 in its charging cradle and allow a full uninterrupted charge cycle before use. The onboard fuel gauge needs a complete cycle to calibrate against the new cell — skipping this gives inaccurate charge indicators from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Inspire 500 cuts out mid-workout on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Inspire 500 draws from one small cell to power both audio decoding and the wireless radio simultaneously. Under combined load — particularly during high-tempo audio with strong signal demand — voltage briefly sags below the BMS cutoff threshold. A new cell that hasn't completed its first full conditioning cycle has slightly higher internal resistance, which makes that sag more pronounced. After three to five full charge-discharge cycles, internal resistance drops and the cutoff events stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharging cradle shows full but earbuds cut off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the replacement cell arrives at storage voltage — typically around 3.6V — and the cradle reads that as near-full rather than running a complete charge cycle. The fuel gauge then reports 100% against a cell that is not fully topped up. Run one full charge from flat to termination in the cradle. After that cycle, the gauge resets its reference and the reported charge level will match actual capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097720410,"sku":"BWCS-JBP500SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097753178,"sku":"BWCS-JBP500SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097785946,"sku":"BWCS-JBP500SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBP500SL-1.webp?v=1779934061"},{"product_id":"jabra-elite-85h-replacement-battery-37v-750mah-li-polymer","title":"Jabra Elite 85H Compatible Battery AK-E285 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJabra Elite 85H \/ Evolve2 85 — 3.7V Li-Polymer Replacement Battery (AK-E285)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the AK-E285 Li-Polymer cell for the Jabra Elite 85H and Evolve2 85 wireless headphones. It runs at 3.7V with a 750mAh (2.78Wh) capacity. Fit this battery when the original cell no longer holds a charge or talk time has noticeably dropped.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eElite 85H and Evolve2 85 compatibility:\u003c\/strong\u003e\n    Both models share the same 3.7V battery rail, connector pinout, and BMS handshake protocol — one cell covers both headsets. The AK-E285 part number is common to the entire platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, idle, and active ANC-plus-Bluetooth draw states. The BMS negotiated correctly with the host headset on each run and held voltage within spec under combined load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle base station protocol:\u003c\/strong\u003e\n    Seat the headset in the base station and complete one full charge cycle before taking a call. The base station needs that full cycle to log the new cell — until it does, the talk-time indicator will read inaccurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Elite 85H cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Elite 85H draws simultaneously from the audio processor, ANC circuit, and Bluetooth radio during a call. That combined load creates brief current spikes that a cell at storage voltage cannot sustain cleanly. When cell voltage dips below the BMS protection threshold — even momentarily — the headset drops the connection. Completing a full charge cycle in the base before the first call eliminates this drop-out pattern by bringing the cell to its rated voltage plateau.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows full charge but headset shuts off after short use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage, typically around 3.6–3.7V, not at peak charge. The base station's charge indicator reads a completed charge state before the cell has actually been brought to 4.2V through a proper CC\/CV cycle. The headset then pulls from a cell that looks full but carries less usable energy than expected. Run one complete uninterrupted charge in the base — the indicator should cycle through charging and settle at full — before relying on the headset for extended use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097818714,"sku":"BWCS-JPR285SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097851482,"sku":"BWCS-JPR285SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097884250,"sku":"BWCS-JPR285SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JPR285SL-1.webp?v=1779934062"},{"product_id":"sony-wi-c600n-replacement-battery-37v-130mah-li-polymer","title":"Sony WI-C600N Replacement Battery 3.7V 130mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony WI-C600N \/ WI-C400 \/ WI-C500 Series — 3.7V Li-Polymer Replacement Battery (1-001-274-31)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 130mAh Li-Polymer cell that replaces OEM part 1-001-274-31 in Sony WI-C series wireless earbuds. It fits the WI-C600N, WI-C400, WI-C500, and WI-C200, among others. The cell restores audio playback and active noise cancellation to earbuds whose original battery has degraded from repeated charge cycles.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWI-C series shared cell platform:\u003c\/strong\u003e\n    Sony's WI-C lineup uses the same compact 37.20 × 10.40 × 4.40mm Li-Polymer cell across multiple models. The shared voltage rail and connector spec mean a single replacement cell covers the range — no wiring modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on WI-C series hardware. The BMS accepted the new pack cleanly, completed the charge cycle without error flags, and noise cancellation drew current as expected without triggering any protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle logging on WI-C earbuds:\u003c\/strong\u003e\n    After fitting a new cell, run one complete charge before using ANC. The earbud firmware tracks cell state from the first full cycle — skipping this means the noise cancellation circuit may throttle draw early until the battery management system has a calibrated baseline.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy ANC draw shortens cycle life faster than audio-only use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eActive noise cancellation runs its DSP and microphone circuit continuously alongside the audio path, pulling a sustained combined load from a 130mAh cell. That sustained draw generates more heat in a compact housing than audio alone. Heat accelerates electrolyte degradation in Li-Polymer cells at this capacity. If ANC is not needed, switching to standard mode preserves more charge cycles over the battery's life.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEarbuds cut out mid-playback despite showing charge remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the combined audio plus ANC draw creates a brief voltage sag that crosses the BMS low-voltage cutoff threshold — even if the displayed charge level looks healthy. At 130mAh, the cell has little headroom to absorb a sudden load spike. The BMS trips as a protection response, not because the cell is empty. Confirm cell voltage reads at least 3.7V with the earbuds powered off; if it reads below 3.5V after a full charge, the replacement cell needs one more full conditioning cycle before voltage stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428097917018,"sku":"BWCS-SWC310SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428097949786,"sku":"BWCS-SWC310SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428097982554,"sku":"BWCS-SWC310SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWC310SL-1.webp?v=1779934086"},{"product_id":"jbl-live-pro-2-charging-case-replacement-battery-37v-500mah-li-polymer","title":"JBL Live Pro 2 Charging Case Compatible Battery 3.7V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJBL Live Pro 2 Charging Case — 3.7V Li-Polymer Replacement Battery (GSP721641)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 500mAh Li-Polymer battery for the JBL Live Pro 2 Charging Case and Tune Flex Charging Case. It replaces the internal cell that powers the case's ability to store charge and top up your earbuds between AC connections. When this cell degrades, the case stops delivering full charge cycles to the earbuds — this battery restores that function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLive Pro 2 and Tune Flex case compatibility:\u003c\/strong\u003e\n    Both cases use the same GSP721641 cell, same 3.7V rail, and the same charging IC on the case PCB. The connector pinout and physical dimensions match — 42.20 x 15.40 x 7.50mm — so no adapter or modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Live Pro 2 case. The BMS accepted the pack without fault flags, and the case resumed earbud charging normally across multiple sessions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCase recalibration after replacement:\u003c\/strong\u003e\n    After fitting the new cell, drain the case fully via earbud charging, then charge it back to 100% on USB-C before use. The case firmware recalculates its charge display based on this first full cycle — skipping it causes the LED indicator to misread remaining capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the case LED shows full but the earbuds cut to low battery faster than expected\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA worn or newly installed cell often sits at storage voltage — around 3.6–3.7V — which the case firmware reads as a near-full charge. Under actual earbud charging load, voltage drops quickly and the case depletes faster than the indicator suggests. This is not a fault with the replacement cell. One full drain-and-charge cycle lets the firmware recalibrate the state-of-charge curve against the new cell's actual capacity. After that first cycle, the LED indicator tracks remaining charge accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCase not charging the earbuds at all after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the earbuds sit in the case but show no charge gain, the most common cause is an incomplete BMS handshake after installation — the case PCB did not complete its initialisation with the new cell. Remove the earbuds, connect the case to USB-C power for at least 30 minutes without the earbuds seated, then reinsert them. If the case still shows no output, check that the cell connector is fully seated — a partially connected ribbon can cause the PCB to detect a fault and disable the output rail entirely. Confirm the case wakes up by pressing the button; no LED response at all points to a connection issue rather than a cell fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098015322,"sku":"BWCS-JBF200SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098048090,"sku":"BWCS-JBF200SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098080858,"sku":"BWCS-JBF200SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-JBF200SL-1.webp?v=1779934060"},{"product_id":"samsung-sm-r630n-replacement-battery-388v-500mah-li-polymer","title":"Samsung Galaxy Buds Live EB-BR630ABY Replacement Battery 3.88V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Buds Live SM-R630N — 3.88V Li-Polymer Replacement Battery (EB-BR630ABY)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.88V, 500mAh Li-Polymer battery for the Samsung Galaxy Buds Live (SM-R630N). It replaces part number EB-BR630ABY and fits directly into the earbud housing. When the original cell degrades and the buds no longer hold a usable charge, this restores full capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-R630N and Galaxy Buds 3 Pro compatibility:\u003c\/strong\u003e\n    Both models share the same cell form factor, voltage rail, and BMS handshake protocol — 30.70 x 21.00 x 5.50mm footprint with a 3.88V nominal charge curve matched to Samsung's charging IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through Samsung's charge controller and confirmed the BMS accepted the handshake without fault codes. The protection circuit responded correctly to both charge cutoff at 4.35V and low-voltage cutoff near 3.0V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Place the earbud in the case and allow a complete charge cycle before pairing. The Galaxy Buds Live case logs the new cell during this cycle — skipping it causes the companion app to display an inaccurate battery percentage.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Galaxy Buds Live cuts out mid-call on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Buds Live drives two simultaneous loads — audio playback and the Bluetooth radio. Under a voice call, peak draw spikes above what idle streaming requires. If the replacement cell hasn't completed a full charge cycle, the BMS can interpret the brief voltage sag from that combined draw as an undervoltage event and cut power. This is not a faulty battery — it resolves after the first two or three full charge cycles stabilise the cell's internal resistance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCompanion app showing 0% or incorrect battery level after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSamsung's Galaxy Wearable app reads battery state through the BMS, not raw voltage. After a cell swap, the BMS ships at storage voltage — roughly 3.6–3.7V — and the app cannot map that to an accurate percentage until the cell completes a calibration cycle. Place both earbuds in the case, close the lid, and let the case charge them to 100% without interruption. After that cycle, the app percentage will track correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098113626,"sku":"BWCS-SMR630SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098146394,"sku":"BWCS-SMR630SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098179162,"sku":"BWCS-SMR630SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR630SH-1.webp?v=1779934087"},{"product_id":"samsung-galaxy-buds-pro-replacement-battery-38v-470mah-li-polymer","title":"GH43-05062A Samsung Galaxy Buds Pro Compatible Battery 3.8V 470mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Buds Pro — 3.8V Li-Polymer Replacement Battery (GH43-05062A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 470mAh lithium-polymer cell replaces the original battery inside each Samsung Galaxy Buds Pro earbud (SM-R190). It fits the earbud unit directly — not the charging case. When the original cell degrades after repeated charge cycles, this replacement restores full audio output capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGalaxy Buds Pro and SM-R190 fit:\u003c\/strong\u003e\n    Both model references map to the same hardware revision. The GH43-05062A cell uses the same contact configuration and physical footprint — 30.40 x 24.20 x 5.40mm — so the BMS handshake with the earbud firmware completes correctly after installation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge-discharge cycles on SM-R190 hardware. The BMS accepted the new cell without fault flags, and capacity readings stabilised within three full cycles from the charging case.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging protocol:\u003c\/strong\u003e\n    After fitting this cell, seat the earbud in the case and run one complete charge cycle before use. The case uses charge current to log the new cell — skipping this step causes the earbud to report incorrect battery status in the Galaxy Wearable app.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy Galaxy Buds Pro cut out mid-call after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Buds Pro draw simultaneously from the audio processor and the Bluetooth radio during calls. That combined load pulls more current than music playback alone. A cell sitting at storage voltage — typically around 3.6V — cannot sustain that dual draw, causing the BMS to trip the output. Running one full charge cycle in the case before a call brings the cell to 4.2V and lets it handle the combined audio-plus-radio current without dropping out.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGalaxy Wearable app showing full charge but earbud shuts off after a few tracks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the earbud firmware still holds the capacity model of the old, degraded cell. The app reads voltage and maps it to percentage using that outdated baseline, so it reports \"full\" while actual usable capacity is already low. The fix is three complete charge-and-drain cycles through the case — this forces the firmware to recalibrate its capacity estimate against the new cell. After the third cycle, the percentage readout and actual cutoff voltage align at 3.5V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098211930,"sku":"BWCS-SMR911SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098244698,"sku":"BWCS-SMR911SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098277466,"sku":"BWCS-SMR911SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR911SH-1.webp?v=1779934086"},{"product_id":"sena-spider-st1-replacement-battery-37v-800mah-li-polymer","title":"Sena Spider ST1 Replacement Battery 3.7V 800mAh AHB802540","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSena Spider ST1 \/ SP105 \/ SP88 — 3.7V Li-Polymer Replacement Battery (AHB802540)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-Polymer replacement cell for the Sena Spider ST1 Bluetooth motorcycle headset and its SP105, SP88, and Spyder 1S siblings. All four models share the same AHB802540 cell and connector. The pack sits inside the helmet-mount unit and powers the combined Bluetooth radio, audio output, and microphone circuit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpider ST1, SP105, SP88, Spyder 1S fit:\u003c\/strong\u003e\n    These headsets share the same 3.7V power rail, physical cell footprint (42.60 × 24.70 × 7.80mm), and BMS handshake protocol — so a single cell covers the full range. No wiring modifications needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on the Spider ST1 unit. The BMS accepted the cell without fault codes, and the protection circuit tripped correctly at low-voltage threshold as expected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging on the Spider ST1:\u003c\/strong\u003e\n    Place the headset in its cradle and run one full charge before making any calls. The ST1's talk-time indicator pulls its estimate from the BMS log — a new cell starts at storage voltage, so the display will read inaccurate until the first complete cycle finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — roughly 3.6V — not at full capacity. The Spider ST1 draws from the Bluetooth radio, audio amplifier, and microphone simultaneously, so any shortfall in initial cell voltage shows up quickly under combined load. Talk time typically improves across three to five full charge-discharge cycles as the cell reaches its rated 800mAh capacity. If talk time is still noticeably short after five cycles, check that the cradle contacts are clean and making solid contact with the headset terminals.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMid-call dropout on a freshly fitted cell is almost always a voltage sag event. The Spider ST1 peaks its draw when Bluetooth transmission and audio output fire at the same moment — if the cell hasn't completed its first full cycle, that instantaneous load can drag voltage below the BMS cutoff threshold. The headset powers off to protect the cell. The fix is straightforward: complete two or three full charge cycles before extended use, and confirm the replacement cell matches the 3.7V nominal voltage exactly — a mismatched cell will sag harder under peak draw.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098310234,"sku":"BWCS-SST100SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098343002,"sku":"BWCS-SST100SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098375770,"sku":"BWCS-SST100SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SST100SL-1.webp?v=1779934086"},{"product_id":"adidas-rpt-01-replacement-battery-37v-700mah-li-polymer","title":"adidas RPT-01 Wireless Headset Compatible Battery 3.7V 700mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eadidas RPT-01 — 3.7V Li-Polymer Replacement Battery (AHB603040)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 700mAh Li-Polymer cell replaces the original AHB603040 battery in the adidas RPT-01 wireless headset. It restores audio playback and wireless connectivity after the original cell has degraded through repeated charge cycles. Capacity is 2.59Wh, matching the stock specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRPT-01 battery fit:\u003c\/strong\u003e\n    The RPT-01 uses a compact Li-Polymer cell at 42.00 × 29.80 × 6.10mm. That specific footprint and the onboard BMS handshake determine which cells will seat and communicate correctly — the AHB603040 part number confirms the match.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the RPT-01 platform. The BMS accepted the new pack without error flags, and the protection circuit responded correctly to both low-voltage cutoff and charge termination signals.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charge protocol for the RPT-01:\u003c\/strong\u003e\n    Place the headset in its charging cradle and run a full, uninterrupted charge before first use. The RPT-01's firmware logs the new cell during that first complete cycle — skip it and the talk-time estimate displayed will be inaccurate until the cycle 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 RPT-01 cuts out mid-audio on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RPT-01 pulls simultaneous current for both audio processing and its wireless radio. Under that combined draw, a cell that hasn't completed its first full cycle can sag below the BMS cutoff threshold briefly, dropping the connection. This isn't a faulty cell — it's the protection circuit responding to a momentary voltage dip in an undercharged pack. Running one complete charge cycle before use stabilises the cell voltage and prevents that sag under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than rated on the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell doesn't deliver full capacity on day one. Internal resistance is slightly higher out of storage, and the electrolyte needs several charge-discharge cycles to fully condition. On the RPT-01, rated talk time typically isn't reached until cycle three to five. Each full charge-discharge pass reduces internal resistance incrementally — by cycle five, measured capacity should be at or close to the rated 700mAh.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098408538,"sku":"BWCS-APT001SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098441306,"sku":"BWCS-APT001SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098474074,"sku":"BWCS-APT001SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-APT001SL-1.webp?v=1779934060"},{"product_id":"sena-sf2-replacement-battery-37v-800mah-li-polymer","title":"Sena SF2 Replacement Battery 3.7V 800mAh AHB802540","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSena SF2 \/ SF4 — 3.7V Li-Polymer Replacement Battery (AHB802540)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-Polymer cell built to the AHB802540 specification. It fits the Sena SF2 and SF4 Bluetooth motorcycle helmet headsets. Swap it when the original cell no longer holds a charge or the headset shuts down mid-ride.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSF2 and SF4 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay, connector pinout, and BMS handshake protocol. One cell covers both headsets without any hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the SF2 charging circuit and monitored BMS communication. The protection circuit engaged correctly at low-voltage cutoff and the base station reported a full charge state after a complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after installation:\u003c\/strong\u003e\n    Place the headset in the base station and let it run a complete charge cycle before pairing or taking a call. The SF2 base needs to complete this cycle to calibrate its talk-time indicator — skipping it causes the display to misreport remaining charge from the first use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SF2 cuts out mid-call even with a new battery installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SF2 draws current from two loads simultaneously — the audio amplifier and the Bluetooth radio. Under combined load, a cell sitting at storage voltage can sag below the BMS cutoff threshold briefly, triggering a shutdown. This is not a faulty cell. Run two or three full charge-discharge cycles through normal use and the resting voltage stabilises above the cutoff point. If drop-outs continue after three cycles, check the connector seating — the SF2 bay is shallow and a partially seated cell creates resistance that worsens voltage sag.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows charging error after fitting a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SF2 base station performs a BMS handshake at the start of every charge session. A new cell shipped at storage voltage (typically 3.6–3.7V) can cause the base to flag an error before the handshake completes. Remove the headset from the base, wait ten seconds, and reseat it firmly. If the error persists, connect the base to power first, then place the headset — this sequence lets the base initialise its charge controller before attempting communication with the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098506842,"sku":"BWCS-SSF200SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098539610,"sku":"BWCS-SSF200SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098572378,"sku":"BWCS-SSF200SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SSF200SL-1.webp?v=1779934086"},{"product_id":"lexin-lx-b4fm-replacement-battery-37v-800mah-li-polymer","title":"LEXIN LX-B4FM Wireless Headset Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLEXIN LX-B4FM \/ FT4 Pro — 3.7V Li-Polymer Replacement Battery (AHB802540)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-Polymer cell that replaces the original AHB802540 pack in the LEXIN LX-B4FM and FT4 Pro motorcycle Bluetooth headsets. It fits directly into both models, which share the same battery bay dimensions and BMS handshake protocol. Capacity is 800mAh (2.96Wh), matching the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLX-B4FM and FT4 Pro compatibility:\u003c\/strong\u003e\n    Both models run the same 3.7V single-cell architecture with an identical connector and BMS communication line. One replacement cell covers both units without any wiring changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the LX-B4FM platform. The BMS accepted the cell without fault codes, and protection thresholds tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle charging on the headset:\u003c\/strong\u003e\n    After fitting this battery, seat the headset in its charging cradle and let it complete one full, uninterrupted charge before use. The LX-B4FM's firmware logs the new cell during that first cycle — skip it and the talk-time indicator will read inaccurately for the first several sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the LX-B4FM cuts out mid-call on a fresh battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LX-B4FM combines Bluetooth audio and intercom radio draw simultaneously during a call. That combined current spike can briefly pull cell voltage below the BMS cutoff threshold — especially on a new cell that hasn't completed its first full conditioning cycle. The BMS reads the sag as an undervoltage event and shuts the unit down to protect the cell. This typically resolves after three to five full charge-discharge cycles, once the cell's internal resistance settles to its operating baseline.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset shows full charge but cuts off after a few minutes of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA replacement cell shipped at storage voltage — roughly 3.6–3.7V — can fool the headset's charge indicator into displaying a full bar. The cell isn't actually fully charged; it's just resting above the empty threshold. Seat the headset in the cradle, wait for the indicator to cycle through to a confirmed full charge, then disconnect. If the issue persists after two full cycles, check that the cradle contacts are clean and making solid connection with the headset pins.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098637914,"sku":"BWCS-LXB400SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098670682,"sku":"BWCS-LXB400SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098703450,"sku":"BWCS-LXB400SL-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LXB400SL-1.webp?v=1779934086"},{"product_id":"fodsports-m1s-pro-replacement-battery-37v-800mah-li-polymer","title":"Fodsports M1S Pro Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFodsports M1S Pro — 3.7V Li-Polymer Replacement Battery (LFT802540)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 800mAh Li-Polymer cell replaces the original LFT802540 battery in the Fodsports M1S Pro Bluetooth headset. It restores power to the audio and wireless connectivity functions when the original cell has degraded or stopped holding a charge. Dimensions are 41.90 x 24.50 x 8.00mm — confirm against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM1S Pro fit:\u003c\/strong\u003e\n    The M1S Pro runs audio decoding and Bluetooth radio from a single cell. Both draw simultaneously during calls, so the cell voltage rail must stay stable under combined load — this replacement matches the original voltage and connector to maintain that balance.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell under combined Bluetooth radio and audio draw. The BMS held voltage within spec throughout and cut off cleanly at the lower threshold — no premature dropout was triggered.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after fitting:\u003c\/strong\u003e\n    Charge the M1S Pro to full before making a call. The headset's talk-time estimate is logged during that first full cycle — skipping it causes the indicator to report inaccurate charge levels for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M1S Pro cuts out mid-call even with a charged battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M1S Pro draws from one cell to run both audio processing and the Bluetooth radio at the same time. Under that combined load, a degraded or newly fitted cell can sag below the BMS cutoff threshold before the displayed charge level suggests it should. The BMS reads actual cell voltage — not the percentage shown on a paired device. If the headset cuts mid-call, check the resting voltage of the cell; it should read above 3.6V after a full charge cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than expected on the first few charges\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell does not deliver full capacity on the first charge. Internal resistance is slightly elevated until the cell has been through three to five full charge and discharge cycles. During this period the M1S Pro will cut off earlier than the rated capacity implies. Run the headset through several complete cycles — charge fully, use until the low-battery alert triggers, then recharge — and talk time will increase to the cell's rated 800mAh output.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098801754,"sku":"BWCS-FPM100SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098834522,"sku":"BWCS-FPM100SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098867290,"sku":"BWCS-FPM100SL-3","price":39.99,"currency_code":"USD","in_stock":true}]},{"product_id":"coinsound-e7-replacement-battery-37v-1800mah-li-polymer","title":"Coinsound E7 Replacement Battery PCT903450 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCoinsound E7 Series — 3.7V Li-Polymer Replacement Battery (PCT903450)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1800mAh Li-Polymer cell replaces the original PCT903450 pack in the Coinsound E7, E7 Pro, and OWIN E7 wireless headsets. It restores full charge capacity when the original cell has degraded through repeated cycles. Voltage and connector match the OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE7, E7 Pro, and OWIN E7 compatibility:\u003c\/strong\u003e\n    All three models share the same PCB layout, connector pinout, and 3.7V power rail, which is why they take the same PCT903450 cell. The BMS on each variant reads cell voltage and temperature through the same logic — no firmware difference affects pack recognition.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the E7 base station and confirmed the BMS completed a full charge handshake without throwing a fault. Discharge held steady under combined DECT radio and audio draw with no mid-cycle cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge in the base station:\u003c\/strong\u003e\n    Seat the headset in the base dock and let it complete a full uninterrupted charge before use. The E7 base logs the new cell during this cycle — skipping it causes the talk-time indicator to read inaccurately until the calibration cycle finishes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E7 base station checks for a BMS handshake before it starts the charge cycle. If the new cell ships at storage voltage — typically around 3.6V — the base may flag an error on first dock because it expects a cell already within its normal operating window. Place the headset in the dock, leave it for 10 minutes, then remove and re-seat it. This gives the BMS time to initialise and pass the voltage check, after which the base clears the error and begins charging normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call even after a full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe E7 draws current from two sources simultaneously during a call — the DECT radio transmitter and the audio codec. That combined load creates brief current spikes that exceed what a degraded or shallow-cycled cell can deliver without a voltage sag. When cell voltage dips below the BMS cutoff threshold during a spike, the headset drops the call and powers off. After fitting a new cell, run three to five full charge-discharge cycles before judging talk time — capacity improves as the cell conditions. If cut-outs persist past cycle five, confirm the base dock contacts are clean and making firm contact with the headset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428098932826,"sku":"BWCS-CIE700SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428098965594,"sku":"BWCS-CIE700SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428098998362,"sku":"BWCS-CIE700SL-3","price":39.99,"currency_code":"USD","in_stock":true}]},{"product_id":"cowin-e7-replacement-battery-37v-1800mah-li-polymer","title":"COWIN E7 Replacement Battery 3.7V 1800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCOWIN E7 \/ E7 Pro — 3.7V Li-Polymer Replacement Battery (AHT903450)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1800mAh Li-Polymer cell replaces the internal battery in the COWIN E7 and E7 Pro over-ear wireless headphones. It restores power to the Bluetooth radio, active noise cancellation circuit, and onboard controls. OEM part number is AHT903450.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eE7 and E7 Pro compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS voltage thresholds. The cell sits in a 52.80 × 33.50 × 9.00mm envelope — the E7 Pro does not use a larger pack despite its extended feature set.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the E7's charge circuit and confirmed the BMS accepted the pack, raised voltage cleanly from storage level to 4.2V, and released the protection latch at end-of-charge without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eANC draw on first charge:\u003c\/strong\u003e\n    The E7's noise-cancellation circuit pulls continuous current on top of the Bluetooth radio load. On the first charge after fitting this cell, leave ANC off until the pack completes one full charge cycle — the BMS calibrates its state-of-charge estimate against a stable load baseline.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the E7 cuts out mid-call on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-Polymer cell ships at storage voltage — typically around 3.6–3.7V. The E7's combined Bluetooth and ANC draw creates a brief current spike that can push the BMS into undervoltage protection before the cell has been conditioned. The protection latch trips and the headset goes silent. One full charge cycle brings the cell to 4.2V and lets the BMS set accurate cutoff thresholds, eliminating the false trip.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time noticeably shorter in the first few uses after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells don't deliver full rated capacity on cycle one. Internal resistance is slightly elevated out of the box, and the BMS hasn't yet mapped the cell's actual charge curve. Usable capacity steps up across three to five full charge-discharge cycles as the cell settles. By cycle five, you should see capacity close to the rated 1800mAh — if talk time is still short after that, check that the charging cable is delivering a stable 5V to the headset's micro-USB port.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428099031130,"sku":"BWCS-CWE700SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428099063898,"sku":"BWCS-CWE700SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428099096666,"sku":"BWCS-CWE700SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CWE700SL-1.webp?v=1779934060"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-HRX300SL-6.webp?v=1780021726","url":"https:\/\/batteryweb.com\/collections\/wireless-headset.oembed?page=7","provider":"BatteryWeb","version":"1.0","type":"link"}