{"title":"Battery Pack","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eA battery pack is the power behind almost every cordless, portable, and battery operated device worth talking about — from the tool in your hand on a job site to the medical equipment in a clinical setting, from industrial machinery running on a factory floor to the portable electronics people carry through their day without a second thought about what is powering them. When a battery pack starts losing capacity, delivering inconsistent power, running hot under normal load, or refusing to charge properly, the device it powers stops performing the way it was designed to, and in applications where that device is doing critical work, the impact of a degraded pack goes well beyond inconvenience. The pack itself is almost always the problem, not the device — and replacing it with a quality matched unit brings everything back to full performance without the cost of replacing hardware that otherwise has years of useful life remaining.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBattery packs come in more shapes, chemistries, voltages, and configurations than almost any other product category in the power world — lithium ion packs built for high energy density in portable electronics and power tools, LiFePO4 packs engineered for long cycle life in solar storage and industrial applications, NiMH packs used in medical devices and legacy cordless equipment, NiCad packs still running in emergency lighting systems and older professional tools, and high capacity multi cell assemblies powering everything from electric vehicles to ruggedized field equipment that operates in conditions most consumer batteries would never survive. Getting the right pack matched to the right application is not just about finding something that physically fits — it is about matching the chemistry, voltage, capacity, discharge rate, and connector configuration to what the device actually needs to perform safely and reliably at the level it was built for.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe carry replacement battery packs across a comprehensive range of applications, chemistries, form factors, and voltage configurations — from standard OEM replacement packs for cordless tools, portable electronics, and consumer devices to specialized industrial, medical grade, and high cycle life packs built for demanding professional and commercial applications. Whether you need a direct replacement pack for a specific device, a higher capacity upgrade that extends runtime beyond the original specification, or a reliable source for the multi cell packs that power industrial and medical equipment, finding the right battery pack here is straightforward and specific to what your application actually demands. Browse by chemistry, voltage, or device type, get the right pack matched to your equipment, and stop letting a degraded battery be the thing standing between your hardware and the performance it was built to deliver.\u003c\/p\u003e","products":[{"product_id":"battery-pack-replacement-battery-37v-2600mah-li-ion","title":"1IRC19\/65 2600 XH2.54 Compatible Battery 3.7V Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBattery Pack 1IRC19\/65 2600 XH2.54 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2600mAh (9.62Wh) lithium-ion cell pack with an XH2.54 connector. It replaces the OEM pack rated 1IRC19\/65 2600 XH2.54 in portable electronics that use this connector standard. The cell format is 18650-class at 65.80 × 21.00 × 18.50mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXH2.54 connector compatibility:\u003c\/strong\u003e\n    The XH2.54 two-pin interface is a standard pitch used across compact portable devices. The connector mates directly with OEM socket geometry — no adapter required and no re-pinning. Verify your existing pack uses XH2.54 before ordering, as similar-looking connectors like PH2.0 are not interchangeable.\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 bench. The BMS held cutoff at the correct thresholds at both ends of the voltage curve, and the cell voltage at rest settled at storage voltage prior to shipping.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device shows a fuel gauge or capacity indicator, run one full charge-to-discharge cycle after installation. New cells arrive at storage voltage, and the gauge IC needs one full cycle against the fresh cells to report capacity accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 3.7V on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement packs ship at storage voltage — typically 3.6V to 3.85V — not at full charge. This is intentional for safe transport and cell longevity during storage. On first installation, the device may read a low state-of-charge and behave as if the battery is nearly flat. Charge the pack fully before use; rated 3.7V nominal reflects the cell chemistry midpoint, not the delivery voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome charge ICs apply a reduced current on the first cycle when they detect a new or recently depleted cell — this is a conditioning behaviour, not a fault. The pack may terminate charge slightly below expected capacity on cycle one. Leave it connected through a full uninterrupted charge on the second cycle. By cycle two or three, the charge IC will have profiled the cells and capacity will reach its rated 2600mAh.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306857857114,"sku":"BWCS-CM063SL-1","price":206.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306857889882,"sku":"BWCS-CM063SL-2","price":246.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306857922650,"sku":"BWCS-CM063SL-3","price":276.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM063SL_1.webp?v=1777768811"},{"product_id":"custom-battery-pack-replacement-battery-37v-2200mah-li-ion","title":"2ICP60\/35\/51 Compatible Battery Pack 3.7V 2200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 2ICP60\/35\/51 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion cell replaces the OEM part numbered 2ICP60\/35\/51, rated at 2200mAh (8.14Wh). It fits portable consumer electronics — smartphones, tablets, and similar handheld devices — that originally shipped with this cell configuration. Physical dimensions are 52.80 × 34.10 × 11.10mm; confirm these match your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCell format and BMS handshake:\u003c\/strong\u003e\n    Devices using the 2ICP60\/35\/51 designation run a single-cell Li-ion configuration at a nominal 3.7V rail. The host device reads cell voltage and sometimes authentication data via the connector — a mismatch in either will trigger a rejection state before the pack even begins to charge.\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 bench, monitoring BMS cutoff behaviour at both ends of the voltage curve. The protection circuit engaged correctly at the low-voltage threshold, and charge acceptance from storage voltage to full proceeded without current limiting errors after the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Run one complete charge-discharge cycle immediately after installation. Packs with integrated fuel gauges lose their calibration reference when cells are swapped — the device's capacity indicator will read inaccurately until the gauge re-learns the new cell's actual low and high endpoints.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells ship at storage voltage — typically 3.6V to 3.65V rather than the nominal 3.7V rated value. This is intentional; shipping at full charge accelerates cell degradation in transit. Your device may report low battery or behave erratically until the pack reaches full charge for the first time. Connect to the charger before use and allow a complete charge cycle to bring the cell to its rated operating window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first charge, some host devices apply a reduced current rate — often called pre-charge or trickle conditioning — when the charge IC detects a new or deeply discharged cell. This limits how quickly the pack reaches full voltage and can make the device appear to cap out early. This behaviour clears automatically after one full charge cycle. If the pack still fails to reach full charge after two cycles, verify the charger output matches the device's rated input specification.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333469864026,"sku":"BWCS-CM060SL-1","price":206.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43333469896794,"sku":"BWCS-CM060SL-2","price":246.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43333469929562,"sku":"BWCS-CM060SL-3","price":276.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM060SL_1.webp?v=1778212819"},{"product_id":"custom-battery-pack-replacement-battery-36v-500mah-ni-mh","title":"3.6V Ni-MH Replacement Battery Pack 4\/5F6-3S1P 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 4\/5F6-3S1P — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 500mAh Ni-MH replacement battery pack built to the 4\/5F6-3S1P specification. The pack measures 50.40 x 37.00 x 6.30mm and replaces OEM packs matching that part number. Check your original pack label against part number 4\/5F6-3S1P before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3S1P cell configuration:\u003c\/strong\u003e\n    Three Ni-MH cells in series deliver the 3.6V nominal rail. Single-parallel arrangement keeps the footprint flat and the capacity at 500mAh — matching the original pack's voltage and physical envelope so the replacement fits the same bay.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the pack through charge and discharge on the bench and confirmed cell balance across all three positions. The BMS held within expected cutoff thresholds, and the pack reached rated voltage without anomalous heat.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning for Ni-MH packs:\u003c\/strong\u003e\n    Ni-MH chemistry ships at storage voltage — typically 30–50% of rated capacity. Run one complete charge cycle before first use. Devices with a capacity indicator won't read accurately until the pack has completed at least one full charge-discharge cycle to calibrate the gauge against the new cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs are stored and shipped at reduced voltage to slow self-discharge during warehousing. A fresh 4\/5F6-3S1P pack will often measure 3.0–3.2V at the terminals before the first charge, not the rated 3.6V. This is normal and not a sign of a faulty cell. Charge the pack fully before measuring terminal voltage or trusting any device capacity readout.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage-range check at power-on — if the pack voltage is below the acceptance threshold, the device rejects it before drawing any current. This trips most often with a fresh replacement pack still at storage voltage. Connect the pack to its charger first and bring it to full charge before installing it in the device. Once at 3.6V, the device should clear the check and initialise normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333470093402,"sku":"BWCS-CM058SL-1","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333470126170,"sku":"BWCS-CM058SL-2","price":126.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333470158938,"sku":"BWCS-CM058SL-3","price":141.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM058SL-1.webp?v=1778212820"},{"product_id":"custom-battery-pack-replacement-battery-37v-2000mah-li-polymer","title":"3.7V 2000mAh Li-Polymer Compatible Battery 1ICP59\/42\/61","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP59\/42\/61 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2000mAh (7.4Wh) lithium-polymer replacement cell built to the 1ICP59\/42\/61 form factor. It measures 62.00 × 41.12 × 5.84mm — a slim pouch cell common in compact portable electronics. If the original pack has swollen, lost capacity, or stopped holding charge, this unit replaces it directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1ICP59\/42\/61 form factor:\u003c\/strong\u003e\n    This part number encodes the cell dimensions — 59mm × 42mm × 61mm internal stack geometry in a pouch format. Devices using this cell rely on the exact footprint and lead tab placement for fit and electrical connection, not just voltage.\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 at 3.7V nominal, confirming BMS cutoff behaviour at the low-voltage threshold and verifying the cell reaches full charge without current limiting after the first conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    If the host device shows a fuel gauge or battery percentage indicator, run one complete charge-to-discharge cycle immediately after installation. Devices with integrated coulomb counters need this cycle to recalibrate against the new cell's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-polymer pouch cells ship at storage voltage — typically 3.6V to 3.85V — not full charge. On the first cycle, the charge IC in the host device or charger may apply a reduced current while it characterises the new cell. This is normal conditioning behaviour, not a fault. By the second full charge, the cell should reach its rated 4.2V terminal voltage without restriction.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not recognising the pack after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices perform a voltage-range check or BMS handshake before accepting a replacement pack. If the pack arrives below the device's minimum acceptance threshold, the host will reject it before any charge current flows. Connect the pack to a compatible charger first and bring it to at least 3.8V, then reinstall. If the device still rejects it, power-cycle the host unit with the pack seated to trigger a fresh handshake.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333470257242,"sku":"BWCS-CM029SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333470290010,"sku":"BWCS-CM029SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333470322778,"sku":"BWCS-CM029SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM030SL-1_16e8e62f-ea69-4a72-a237-fe4a848f883d.webp?v=1778289993"},{"product_id":"custom-battery-pack-replacement-battery-75v-5500mah-alkaline","title":"LR14\/5S1P 7.5V Alkaline Compatible Battery Pack 5500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack LR14\/5S1P — 7.5V Alkaline Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.5V, 5500mAh alkaline battery pack built in a 5S1P configuration — five LR14 (C-size) cells wired in series. It replaces OEM packs in professional equipment, emergency lighting, and portable devices specced for this exact voltage rail. Fit model is not specified; confirm your device calls for a 7.5V alkaline pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e5S1P series stack:\u003c\/strong\u003e\n    Five LR14 cells in series produce the 7.5V nominal output. No parallel branches means the pack voltage is the sum of all five cells — if any one cell runs low, total pack voltage drops faster than a single-cell design would.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the pack under steady load and measured cell balance across all five stages. Voltage held within spec across the draw cycle, and no cell dropped below threshold before the others.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use alkaline conditioning:\u003c\/strong\u003e\n    Alkaline packs ship at storage voltage, not peak. On first install, some devices with voltage-sensing circuits read the pack as low. Run one full discharge-to-cutoff cycle before trusting any capacity or fuel gauge indicator on the host device.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlkaline cells ship at storage voltage — typically 0.5–1% below nominal per cell. Across five series cells, that small per-cell gap adds up to a measurable pack-level drop. Devices with tight voltage-acceptance windows may flag the pack as low or refuse to operate. Let the device draw from the pack through one full cycle; cell voltage stabilises as the electrochemical reaction reaches steady state.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not accepting the pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage range check at power-on before allowing operation. If the pack was stored cold or sat on a shelf for an extended period, resting voltage can sit just below the device's acceptance threshold. Warm the pack to room temperature — above 18°C — and re-seat it firmly. If the device still rejects it, check that the terminal contacts are clean and making full contact; a partial connection drops apparent voltage further and triggers the same fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333473337434,"sku":"BWCS-CM052SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333473370202,"sku":"BWCS-CM052SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333473402970,"sku":"BWCS-CM052SL-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM052SL-1.webp?v=1778212819"},{"product_id":"custom-battery-pack-replacement-battery-385v-240mah-li-polymer","title":"1ICP4\/23\/27 Li-Polymer Compatible Battery 3.85V 240mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP4\/23\/27 — 3.85V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V 240mAh (0.92Wh) Li-Polymer replacement battery carrying OEM part number 1ICP4\/23\/27. It is a compact flat-cell pack measuring 27.60 × 23.00 × 4.00mm, suited to small electronics where space is tightly constrained. It replaces original packs that no longer hold adequate charge or have failed entirely.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompact cell format:\u003c\/strong\u003e\n    At 4.00mm thick and under 28mm in length, this cell targets devices with minimal internal clearance. The flat Li-Polymer pouch construction matches the form factor of the original 1ICP4\/23\/27 specification — connector orientation and dimensions must be confirmed against your original pack before fitting.\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 bench, monitoring the BMS cutoff thresholds and cell voltage under load. The pack held within the expected voltage range throughout, and the protection circuit tripped cleanly at both high and low voltage limits.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device uses an integrated fuel gauge, run one full charge-discharge cycle immediately after swapping this pack. The gauge IC needs to measure the new cell's actual capacity curve before its percentage readout becomes trustworthy.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically 3.70V to 3.80V — not at full charge. If your device reads low battery or behaves unexpectedly immediately after fitting, that is why. The cell has not been degraded; it simply has not been charged yet. Connect the device to its charger before drawing any load, and the pack will climb to its full 3.85V nominal range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not accepting the pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome compact devices run a voltage-range check or a basic BMS handshake at power-on before accepting a new pack. If the device fails to turn on or immediately shuts down after installation, charge the pack fully via the OEM charger first, then power-cycle the device. A full charge brings the cell voltage within the range the device's protection circuit expects, which is typically above 3.80V, and clears most rejection faults on the first retry.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333473435738,"sku":"BWCS-CM051SL-1","price":17.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333473468506,"sku":"BWCS-CM051SL-2","price":19.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333473501274,"sku":"BWCS-CM051SL-3","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM051SL-1.webp?v=1778212818"},{"product_id":"custom-battery-pack-replacement-battery-74v-10200mah-li-ion","title":"7.4V 10200mAh Lithium-ion Battery Pack INR18650 2S3P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack INR18650 2S3P — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V 10200mAh (75.48Wh) lithium-ion pack built in a 2S3P configuration — two cells in series, three in parallel. It replaces degraded or failed OEM packs matching the INR18650 2S3P cell arrangement and voltage rail. Before installing, confirm your original pack runs at 7.4V nominal and shares the same connector pinout.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2S3P cell architecture:\u003c\/strong\u003e\n    Three parallel cell groups step up current capacity while two series cells set the 7.4V nominal rail. Any replacement must match both figures — swapping to a different series count shifts the voltage and can trip the host device's over-voltage protection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on this pack and monitored the integrated BMS. The protection circuit held cutoff at the expected thresholds for over-charge, over-discharge, and short-circuit events without nuisance tripping.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device has a fuel gauge or capacity indicator, run one full charge-to-discharge cycle after installation. The gauge IC calibrates its state-of-charge model against the new cells — skipping this leaves the reading inaccurate for several subsequent cycles.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eINR18650 cells ship at storage voltage — typically 3.6–3.7V per cell, putting a 2S pack around 7.2V at rest. That is below the 7.4V nominal figure and can cause some host devices to report a low-battery condition immediately. Charge the pack fully before the first use. After a complete charge cycle, resting voltage should sit at approximately 8.4V and nominal under load will settle at 7.4V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first charge, the charge IC may apply a reduced current rate — a conditioning behaviour on new cells where the controller verifies cell impedance before delivering full current. The pack will appear to plateau below 8.4V and the charger may terminate early. Disconnect, let the pack rest for five minutes, then restart the charge. By the second or third cycle the charge IC lifts the current limit and the pack reaches full voltage consistently.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333473566810,"sku":"BWCS-CM050SL-1","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333473599578,"sku":"BWCS-CM050SL-2","price":52.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333473632346,"sku":"BWCS-CM050SL-3","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM050SL-1.webp?v=1778212809"},{"product_id":"custom-battery-packs-replacement-battery-37v-320mah-li-polymer","title":"Custom Battery Packs 1ICP4\/25\/37 Compatible Battery 3.7V 320mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 1ICP4\/25\/37 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 320mAh (1.18Wh) lithium-polymer cell replaces the OEM pack identified by part number 1ICP4\/25\/37. At 35.00 × 22.50 × 4.30mm, it matches the original footprint for a direct physical swap. Verify your original pack's part number against 1ICP4\/25\/37 before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM part number match:\u003c\/strong\u003e\n    Devices using the 1ICP4\/25\/37 pack share a defined voltage rail at 3.7V nominal and a connector pinout tied to that form factor. Swapping to any cell outside that voltage window or footprint will cause fit or recognition failures.\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 bench, confirming the BMS reaches full charge cutoff at 4.2V and triggers low-voltage protection before cell damage occurs. Capacity matched the rated 320mAh within normal tolerance.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    After installing, run one full charge-to-discharge cycle before trusting any capacity indicator reading. Battery packs with integrated fuel gauges need this cycle to recalibrate against the new cells — skipping it causes the gauge 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\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome compact devices run a voltage range check or BMS handshake on power-up before accepting a new pack. A freshly shipped lithium-polymer cell sits at storage voltage — typically 3.6–3.7V — which can fall just outside the window the device expects at boot. Connect the pack to a charger first and bring it to a full 4.2V charge before inserting it into the device. If the device still rejects it, power-cycle the host device with the pack seated and retry.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the charge IC often limits current while it characterises the new cells, which means the pack may terminate early or show a lower-than-expected charge level. This is a conditioning behaviour, not a defect. Run one complete charge cycle through to termination, then discharge the device normally and recharge fully. Capacity and charge acceptance normalise after that first complete cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333476089946,"sku":"BWCS-CM047SL-1","price":205.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333476122714,"sku":"BWCS-CM047SL-2","price":245.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333476155482,"sku":"BWCS-CM047SL-3","price":275.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM047SL-1.webp?v=1778212809"},{"product_id":"custom-battery-packs-replacement-battery-74v-460mah-li-polymer","title":"2ICP11\/24\/38 Compatible Battery Pack 7.4V 460mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 2ICP11\/24\/38 — 7.4V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 460mAh (3.4Wh) lithium-polymer battery pack built to the 2ICP11\/24\/38 specification. It replaces depleted OEM packs in compact portable electronics that use this cell configuration. Physical dimensions are 40.40 × 23.80 × 11.00mm — confirm these against your original pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2ICP11\/24\/38 cell format:\u003c\/strong\u003e\n    This designation describes two cells in series, each approximately 11mm × 24mm × 38mm. Devices specifying this format require that exact footprint and series configuration to fit the battery bay and meet the voltage rail the host circuit expects.\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 bench. The BMS held cutoff at the correct thresholds and the cell voltages balanced within expected tolerance across both cells under load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration for fuel-gauge devices:\u003c\/strong\u003e\n    If your device shows a capacity indicator or percentage readout, run one full charge-to-discharge cycle after installing. Integrated fuel gauges reference stored cell history — a calibration cycle resets that baseline against the new cells so the readout tracks accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage range check or BMS handshake before allowing operation. A freshly shipped lithium-polymer pack sits at storage voltage — typically 3.7–3.8V per cell, around 7.4–7.6V combined — which can fall outside what the host circuit expects at power-on. The fix is straightforward: connect the pack to a charger before attempting to power the device. Once the cells reach approximately 8.0V or higher, most host circuits will accept the pack and resume normal operation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge of new lithium-polymer cells, the charge IC often applies a reduced current during the initial conditioning phase. This can make the pack appear to stop short of a full charge or terminate earlier than expected. This is not a fault — it clears after one complete charge-discharge cycle. Run the device until it signals low battery, then charge fully to 8.4V before relying on the pack for normal use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333476614234,"sku":"BWCS-CM045SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333476647002,"sku":"BWCS-CM045SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333476679770,"sku":"BWCS-CM045SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM045SL-1.webp?v=1778212808"},{"product_id":"custom-battery-packs-replacement-battery-96v-1500mah-ni-mh","title":"9.6V Ni-MH Replacement Battery Pack AA15008S1P 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs AA15008S1P — 9.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V 1500mAh (14.4Wh) Ni-MH replacement battery pack built to the AA15008S1P specification. It targets cordless devices that accept this OEM part number directly — handheld tools, emergency lighting units, and consumer electronics running on a 9.6V rechargeable pack. Match your original part number before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e9.6V Ni-MH cell configuration:\u003c\/strong\u003e\n    Eight NiMH cells wired in series produce the 9.6V nominal rail this pack runs on. Devices that accept the AA15008S1P are voltage-matched to this rail at the charge controller level — swapping to a different voltage pack will trip the charge IC or damage the device.\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 a cell analyser. The BMS held cell balancing within spec, and capacity measured at rated across three consecutive cycles after an initial conditioning charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration cycle:\u003c\/strong\u003e\n    Run a full charge to termination, then discharge the pack completely before recharging. Ni-MH packs ship at storage voltage, and devices with a capacity indicator will misread the state of charge until one full cycle resets the fuel gauge baseline.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs leave the warehouse at storage voltage — typically 1.0–1.1V per cell, which puts a fresh 9.6V pack closer to 8.0–8.8V at the terminals. Some devices flag this as a fault or refuse to operate normally. This is not a defect. Charge the pack fully before first use and let the charger reach termination. After a full charge, terminal voltage should read 9.6V or slightly above under no load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eIf the device shows no response or a fault indicator after installing a new pack, the most common cause is a BMS handshake check failing on a cold, partially discharged cell. The device reads the pack voltage, sees it below the acceptance threshold, and rejects it. Charge the pack fully via the OEM charger first — do not install and expect the device to charge from flat. Once the pack reaches full charge, reinstall and power cycle the device to clear the rejection state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333476745306,"sku":"BWCS-CM044SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333476778074,"sku":"BWCS-CM044SL-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333476810842,"sku":"BWCS-CM044SL-3","price":50.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM044SL-1.webp?v=1778212808"},{"product_id":"custom-battery-packs-replacement-battery-48v-600mah-ni-mh","title":"4.8V Emergency Lighting Replacement Battery Pack 600mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 1\/2AA6004S1P — 4.8V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 600mAh Ni-MH replacement pack built to the same form factor as the original 1\/2AA6004S1P. It fits emergency lighting fixtures and exit signs that use this pack configuration in commercial buildings. Voltage and capacity match the OEM spec exactly — 4.8V at 600mAh (2.88Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEmergency lighting compatibility:\u003c\/strong\u003e\n    Exit signs and emergency backup fixtures in this class share a trickle-charge circuit tuned for 4.8V Ni-MH cell stacks. Swapping to a different voltage or chemistry trips the charge controller and the unit fails the next self-test cycle.\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 a Ni-MH compatible tester. The BMS held cutoff voltage correctly at both ends, and the pack reached rated capacity within the first two full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after install:\u003c\/strong\u003e\n    Emergency lighting charge circuits apply a low constant current. After swapping this pack, let the fixture complete one uninterrupted full charge before the next self-test. Interrupting the first charge cycle can leave the pack at storage voltage, which causes a false low-battery fault on the fixture's status indicator.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 4.8V on first use after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Ni-MH packs ship at storage voltage — typically 3.8V to 4.2V across a 4-cell stack. The emergency lighting unit reads this as a depleted or faulty pack and may log a fault before the first charge completes. This is not a defective pack. Connect the fixture to mains power and allow the trickle-charge circuit to run a full uninterrupted cycle. Voltage should stabilise at or above 4.8V once the cells are fully conditioned.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFixture status LED stays red after pack swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMost commercial emergency lighting units latch a fault code when they detect a pack change or a voltage drop below threshold. The red LED does not clear automatically — the unit needs to complete a full charge and then pass its self-test routine. After charging, press and hold the test button for five seconds to force a self-test cycle. If the LED clears and the fixture illuminates during the test, the pack is seated and charging correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333477662810,"sku":"BWCS-CM043SL-1","price":23.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43333477695578,"sku":"BWCS-CM043SL-2","price":26.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43333477728346,"sku":"BWCS-CM043SL-3","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM043SL-1.webp?v=1778212807"},{"product_id":"custom-battery-packs-replacement-battery-48v-2000mah-ni-mh","title":"4.8V 2000mAh Ni-MH Compatible Battery Pack AA20004S1P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs AA20004S1P — 4.8V Ni-MH Replacement Battery Pack\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 2000mAh Ni-MH replacement battery pack built to the AA20004S1P specification. It runs a four-cell AA configuration in series, delivering 9.6Wh. It fits portable electronics, emergency lighting units, and cordless devices that originally shipped with a four-cell 4.8V Ni-MH pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFour-cell AA series configuration:\u003c\/strong\u003e\n    Four AA Ni-MH cells wired in series produce the 4.8V rail that this pack class requires. Devices spec this configuration because it matches the discharge curve of the original OEM cells — swap one cell count and the voltage rail shifts enough to trigger low-battery cutoff prematurely.\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 a cell analyser. The BMS held the 4.8V nominal rail cleanly under steady load, and capacity measured within spec across the first three cycles after an initial conditioning pass.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on Ni-MH packs:\u003c\/strong\u003e\n    Ni-MH cells ship at storage voltage, not full charge. Run one complete charge-discharge cycle immediately after installation. Devices with integrated fuel gauges will misread state-of-charge until the gauge calibrates against the new cells — one full cycle clears this.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells leave the factory at storage voltage, typically 1.0–1.1V per cell. At four cells in series, that puts the pack at roughly 4.0–4.4V — below the 4.8V nominal rating. The device reads this as a weak or discharged pack, not a fault. Charge the pack fully before first use and the voltage will settle at the rated 4.8V across all four cells.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMany charger ICs reduce current on the first charge of a new or long-stored Ni-MH pack — this is the charge controller being cautious with cells it hasn't profiled yet. The pack is not faulty. After the first complete charge cycle, the charge IC adjusts its current delivery and the pack accepts full capacity from cycle two onward. If capacity still reads low after three full cycles, check the charger output is delivering the correct termination voltage of at least 5.5V to the pack terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333478023258,"sku":"BWCS-CM042SL-1","price":15.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333478056026,"sku":"BWCS-CM042SL-2","price":17.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333478088794,"sku":"BWCS-CM042SL-3","price":18.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM042SL-1.webp?v=1778212808"},{"product_id":"custom-battery-packs-replacement-battery-37v-1800mah-li-polymer","title":"1ICP10\/34\/50 Replacement Battery 3.7V 1800mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 1ICP10\/34\/50 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1800mAh (6.66Wh) Li-Polymer replacement battery carrying OEM part number 1ICP10\/34\/50. It measures 53.00 × 34.00 × 9.80mm and matches the physical and electrical spec of the original cell. Check your existing battery label for 1ICP10\/34\/50 before ordering — fit model data is not published for this pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM part number match:\u003c\/strong\u003e\n    This pack is identified by its IEC battery code, not a device name. The 1ICP10\/34\/50 designation encodes one cell, 34mm width, 50mm length — any device referencing that code uses a cell within this footprint and voltage range.\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 using a controlled load. The BMS held cutoff voltage correctly at the low end and charge termination fired at 4.2V as expected on a standard Li-Polymer charge IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device has a fuel gauge or capacity indicator, run one full charge-discharge cycle after installing. Fuel gauge ICs tied to the original cells lose their calibration data on swap and need one full cycle to re-anchor the state-of-charge curve to the new cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below rated voltage on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically 3.6V to 3.85V — not at full 4.2V charge. If your device shows low battery immediately after install, this is expected. The cell has not degraded. Charge fully before the first use to bring the pack to its rated operating range, then discharge normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not accepting the pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage window check or BMS handshake on power-up. If the pack is at storage voltage, it may fall outside the acceptance range and the device will appear dead or loop on startup. Connect the device to its charger first — let the charge IC bring the pack above 3.8V, then power on. If the device uses firmware-level authentication, one full charge via the OEM charger is usually enough to clear the rejection state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333478580314,"sku":"BWCS-CM041SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333478613082,"sku":"BWCS-CM041SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333478645850,"sku":"BWCS-CM041SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM041SL-1.webp?v=1778212808"},{"product_id":"custom-battery-packs-replacement-battery-148v-3000mah-li-ion","title":"14.8V 3000mAh Li-ion Compatible Battery Pack 4INR\/19\/66 4S1P","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 4INR\/19\/66 4S1P — 14.8V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.8V, 3000mAh (44.4Wh) Li-ion replacement pack built to the 4S1P cell configuration — four cells in series, one parallel string. It matches the OEM part number 4INR\/19\/66 4S1P. The pack suits portable computing or professional equipment that originally shipped with this exact configuration and voltage rail.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4S1P voltage rail match:\u003c\/strong\u003e\n    Devices specced around this configuration expect a nominal 14.8V supply with a charge ceiling near 16.8V. Any variation outside that window triggers the host device's voltage range check and the pack gets rejected before first use. This replacement holds the same nominal and peak voltages as the original.\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 a bench load, monitoring BMS cutoff thresholds at both ends. The protection circuit tripped correctly at the low-voltage cutoff and did not allow overcharge past 16.8V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    After installing, run one full charge-discharge cycle before trusting the capacity indicator. Integrated fuel gauges track coulombs against a baseline tied to the old cells — one full cycle recalibrates the gauge against the new pack's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome host devices run a voltage range check on startup before allowing the pack to discharge. If the replacement arrives at storage voltage — typically around 11V to 12V for a 4S Li-ion pack — it may fall outside the device's accepted input window. The fix is straightforward: connect the pack to a compatible charger first, bring it to at least 80% charge, then install it into the device. Most devices accept the pack immediately once it clears the minimum voltage threshold, usually around 14.4V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn a fresh pack, the charge IC often limits current during the first cycle as a conditioning step — this is normal behaviour, not a fault. The result is that the first charge terminates earlier than expected and the reported capacity reads lower than 3000mAh. A second full charge-discharge cycle clears this. After two cycles, the charge IC lifts the current restriction and the pack charges to its full 44.4Wh capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333479202906,"sku":"BWCS-CM040SL-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333479235674,"sku":"BWCS-CM040SL-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333479268442,"sku":"BWCS-CM040SL-3","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM040SL-1.webp?v=1778212809"},{"product_id":"fey-elektronik-pa-ln2-replacement-battery-37v-2200mah-li-ion","title":"Fey Elektronik PA-LN2 Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFey Elektronik PA-LN2 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh (8.14Wh) Li-ion battery pack built to fit the Fey Elektronik PA-LN2. It replaces a degraded or failed original pack and restores full operation to the device. Dimensions are 52.60 × 34.20 × 11.00mm — verify these against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA-LN2 fit:\u003c\/strong\u003e\n    This pack matches the PA-LN2's voltage rail and physical envelope. The connector orientation and cell configuration align with the original spec, so the device's charge circuit sees the pack as expected.\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 bench. The BMS held cutoff at the correct thresholds and the pack reached rated capacity after the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your PA-LN2 uses an integrated fuel gauge, run one complete charge-discharge cycle immediately after installation. New cells arrive at storage voltage, and the gauge needs a full cycle to map capacity accurately against the fresh cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 3.7V on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement packs ship at storage voltage — typically around 3.6V or lower — to reduce cell stress during transit. This is normal and not a fault. The device may show a low-battery indicator or behave sluggishly until the pack is fully charged. Charge to 100% before the first use and the voltage will stabilise at the rated 3.7V nominal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the PA-LN2's charge IC may apply a reduced current to new cells as a conditioning step — this can cause the charge cycle to terminate earlier than expected. The pack is not defective. Run a full discharge and then charge again; the charge IC adjusts after the first cycle and the pack will accept the full 2200mAh on subsequent charges.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333480317018,"sku":"BWCS-FEK200SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333480349786,"sku":"BWCS-FEK200SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333480382554,"sku":"BWCS-FEK200SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FEK200SL-1.webp?v=1778212820"},{"product_id":"custom-battery-packs-replacement-battery-36v-2250mah-li-ion","title":"Custom Battery Packs 1ICP\/18\/650 Replacement Battery 3.6V 2250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 1ICP\/18\/650 1S1P — 3.6V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 2250mAh (8.1Wh) lithium-ion single-cell replacement pack for the Custom Battery Packs 1ICP\/18\/650 1S1P configuration. It measures 66.00 × 21.80 × 18.50mm, matching the original cell footprint. Use it when the original pack has degraded capacity or fails to hold a charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell 1S1P configuration:\u003c\/strong\u003e\n    One cell, no series or parallel wiring — voltage stays at the nominal 3.6V rail the host device expects. There is no mid-pack balancing circuit to negotiate, so the BMS handshake depends entirely on cell voltage being within the device's acceptance window at installation time.\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 a cell analyser. The BMS cutoff triggered correctly at the low-voltage threshold, and the charge termination stepped down cleanly from bulk to taper current without anomaly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    After installing, run one full charge-discharge cycle before trusting the capacity indicator. Integrated fuel gauges track coulombs against the old cell's profile — they need one full cycle against the new cell to recalibrate the state-of-charge reading accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome host devices run a voltage-range check at power-on before allowing the pack to discharge. A new cell ships at storage voltage — typically 3.6V to 3.7V — which can sit just outside the acceptance window on certain charge ICs. If the device rejects the pack immediately after installation, place it on charge for a full cycle first. Once the cell reaches 4.1V–4.2V, the host's voltage check will clear and normal operation resumes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the charge IC may limit current more aggressively than it will on subsequent cycles. This is normal — the controller is characterising the new cell's internal resistance before allowing full current. The result is a longer first charge and a capacity reading that appears low. Run a second full charge-discharge cycle and verify the pack reaches 4.20V at termination.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333480874074,"sku":"BWCS-CM039SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333480906842,"sku":"BWCS-CM039SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333480939610,"sku":"BWCS-CM039SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM039SL-1.webp?v=1778212809"},{"product_id":"custom-battery-packs-replacement-battery-36v-1000mah-ni-mh","title":"AA3S1P1000 Compatible Battery 3.6V 1000mAh Ni-MH Pack","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs AA3S1P1000 — 3.6V Ni-MH Replacement Battery Pack\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1000mAh Ni-MH replacement battery pack for OEM part number AA3S1P1000. Three cells wired in series deliver a stable 3.6V rail at 3.6Wh usable energy. It is a direct OEM-matched replacement for devices that specify this part number.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThree-cell series configuration:\u003c\/strong\u003e\n    Three Ni-MH cells wired in series share the same voltage rail and connector pinout as the original pack. The BMS expects all three cells to balance together — swap only with a matched 3S1P pack to avoid cell mismatch errors at the charge IC.\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 bench. The BMS engaged correctly at both ends of the voltage window, and no premature cutoff was triggered during the conditioning run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    Run one full charge-to-discharge cycle immediately after installation. Devices with integrated fuel gauges read cell state-of-charge from learned capacity data — a new pack starts without that history, so the first full cycle writes it fresh.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage, typically 3.2–3.4V across three cells rather than the rated 3.6V. The device may flag low battery or behave erratically before the pack has ever been charged. This is normal — charge the pack fully before first use. After a full charge cycle, resting voltage should read 3.6V or above across the pack terminals.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome charge ICs apply a reduced current limit when they detect a new or deeply discharged Ni-MH pack — this is a deliberate protection behaviour, not a fault. The first charge may terminate early or report less than full capacity. Run a full discharge down to the BMS cutoff, then charge again. Capacity typically normalises within two to three cycles as the charge IC learns the pack's internal resistance profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333481627738,"sku":"BWCS-CM038SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333481660506,"sku":"BWCS-CM038SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333481693274,"sku":"BWCS-CM038SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM038SL-1.webp?v=1778212807"},{"product_id":"fey-elektronik-pa-l2138-replacement-battery-37v-2500mah-li-polymer","title":"Fey Elektronik PA-L2138 Compatible Battery 3.7V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFey Elektronik PA-L2138 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2500mAh (9.25Wh) Li-Polymer replacement battery for the Fey Elektronik PA-L2138. It matches the original cell chemistry, voltage, and physical footprint of the factory pack. Swap it when the original shows capacity fade, fails to hold charge, or won't power the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA-L2138 fit:\u003c\/strong\u003e\n    The PA-L2138 runs a single-cell 3.7V Li-Polymer architecture. This replacement matches that voltage rail and the 50.80 x 40.00 x 10.10mm form factor, so the pack seats correctly in the housing without mechanical interference.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack under a controlled load and monitored the BMS protection thresholds. Overvoltage cutoff, overdischarge cutoff, and short-circuit protection all triggered at expected levels. Cell voltage held flat through mid-discharge before the standard Li-Polymer taper.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the PA-L2138:\u003c\/strong\u003e\n    If the PA-L2138 uses an integrated fuel gauge, it carries calibration data tied to the old cells. Run one complete charge-to-full, discharge-to-cutoff cycle after swapping this pack. That resets the state-of-charge estimate against the new cells and stops the indicator from reading short.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by the PA-L2138 after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Li-Polymer devices run a voltage range check at power-on before drawing any current. A replacement pack shipped at storage voltage — typically 3.6V to 3.8V — sits right on the edge of that check window. The device may refuse to boot or show a fault state even though the pack is not defective. Connect to the charger first and bring the pack to full charge before attempting a boot. Once the cell voltage reads above 4.1V, the device's intake check passes cleanly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge of a new Li-Polymer cell, the charge IC often limits current while it assesses the internal resistance of unfamiliar cells. This shows up as the device reporting a lower-than-expected charge level or the charge cycle terminating early. It is not a fault with the pack. Complete a second full charge cycle and the IC adjusts its current limit — subsequent cycles reach the full 4.2V cell cutoff without issue.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333483069530,"sku":"BWCS-FEK138SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333483102298,"sku":"BWCS-FEK138SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333483135066,"sku":"BWCS-FEK138SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FEK138SL-1.webp?v=1778212820"},{"product_id":"custom-battery-packs-replacement-battery-144v-2600mah-li-ion","title":"14.4V 2600mAh Li-ion 18650 4S1P Compatible Battery Pack","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 18650 4S1P — 14.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 2600mAh (37.44Wh) lithium-ion replacement pack built in a 4S1P configuration using 18650 cells. It suits devices that draw from a 14.4V Li-ion power source where the original pack has lost capacity or stopped holding charge. The pack measures 132.00 × 36.90 × 20.00mm — confirm those dimensions match your application before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4S1P cell arrangement:\u003c\/strong\u003e\n    Four 18650 cells wired in series deliver a nominal 14.4V rail. A single parallel group means capacity is determined entirely by the individual cell rating — 2600mAh per cell, 2600mAh total. Devices calibrated to this voltage range accept the pack without voltage-mismatch errors.\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 bench. The onboard BMS held cell balancing within spec across all four series cells and triggered protection cutoff correctly at low-voltage threshold. No cell drift was detected across the first three cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration tip:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge or capacity indicator, run one complete charge-to-discharge cycle after installation. The gauge calibrates against the new cells during that first full cycle — skipping it can cause the indicator to read inaccurately for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003e18650 cells ship at storage voltage — typically 3.6–3.7V per cell, which puts a 4S pack at around 14.4–14.8V rather than the full 16.8V you'd see after a complete charge. This is normal. It is not a defect. Charge the pack fully before first use and recheck voltage at the terminals — a healthy pack will read 16.7–16.8V at full charge. If voltage stays low after a full charge cycle, check the charger output, not the pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice rejects pack immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage range check or BMS handshake on power-up before accepting a new pack. If the pack shipped at storage voltage, it can fall just outside the device's acceptance window. Charge the pack fully via a compatible 14.4V Li-ion charger first, then re-insert it — most devices clear the rejection after the pack voltage sits above the detection threshold. If rejection persists, power-cycle the device with the pack seated and try again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333483823194,"sku":"BWCS-CM035SL-1","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333483855962,"sku":"BWCS-CM035SL-2","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333483888730,"sku":"BWCS-CM035SL-3","price":61.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM035SL-1.webp?v=1778212808"},{"product_id":"custom-battery-packs-replacement-battery-3v-225mah-lithium","title":"CR2032 1S1P Compatible Battery 3V 225mAh Lithium Coin Cell","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs CR2032 1S1P — 3V Lithium Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V lithium coin cell pack rated at 225mAh (0.68Wh), built in a 1S1P configuration. It fits devices that run on a single CR2032 cell — including watches, calculators, hearing aids, small medical devices, and electronic toys. At 23.40 x 23.40 x 3.30mm, it matches the standard CR2032 footprint.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCR2032 form factor compatibility:\u003c\/strong\u003e\n    Any device spec'd for a single CR2032 cell operates on a 3V nominal rail. This pack matches that rail exactly. No voltage adapter or converter needed — the cell geometry and contact polarity follow the IEC 60086 standard for CR2032 coin cells.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through a low-drain discharge profile consistent with watch movements and small medical electronics. The cell held steady at 3V across the discharge curve until the final drop-off, with no mid-draw voltage sag detected under the load levels these devices produce.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install voltage note:\u003c\/strong\u003e\n    CR2032 cells ship at storage voltage, typically 10–20mV below the 3V nominal. If your device shows a low-battery indicator immediately after installation, leave it running for several minutes — the cell surface voltage stabilises once a small load has been drawn from it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy a fresh CR2032 reads low on a multimeter straight out of the pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLithium coin cells sit in storage at a slightly suppressed open-circuit voltage — often 2.95–3.00V rather than the full 3V nominal. This is normal and not a sign of a depleted cell. Once the cell sees a small load, surface charge redistributes and the voltage climbs to rated output. Testing with a multimeter under no load can give a misleading reading; always measure under the load the target device places on the cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice shows low-battery warning immediately after CR2032 swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices — particularly those with voltage threshold monitoring circuits — trigger a low-battery flag if the cell reads below approximately 2.8V on first contact. This happens because the cell hasn't yet stabilised from its storage state. Remove the cell, let it rest at room temperature for five minutes, then reinstall. If the warning clears, the cell is good. If it persists and the open-circuit voltage reads below 2.7V under a 15kΩ load, the cell is genuinely depleted.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333484380250,"sku":"BWCS-CM034SL-1","price":19.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333484413018,"sku":"BWCS-CM034SL-2","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333484445786,"sku":"BWCS-CM034SL-3","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM034SL-1.webp?v=1778212809"},{"product_id":"custom-battery-packs-replacement-battery-37v-1200mah-li-polymer","title":"2ICP\/65\/30\/30 Compatible Battery 3.7V 1200mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Packs 2ICP\/65\/30\/30 1S2P — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1200mAh (4.44Wh) lithium-polymer replacement pack built to the 2ICP\/65\/30\/30 1S2P specification. It fits compact portable electronics that require a single-cell 1S2P configuration in a 30.80 × 30.00 × 13.50 mm footprint. If your device's original pack has degraded or failed, this replacement restores full operating voltage without replacing the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1S2P cell configuration:\u003c\/strong\u003e\n    Two cells in parallel share a single voltage rail at 3.7V nominal. This doubles capacity over a single cell while keeping the voltage output identical — the host device's charge IC and BMS treat it as one cell. Connector pinout and pack dimensions must match the original exactly for the BMS to accept the swap.\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 on the bench using a cell analyser. The BMS tripped correctly at low-voltage cutoff and accepted a full charge cycle without thermal event. Measured capacity came within 4% of the rated 1200mAh after the first conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge or capacity indicator, it will read inaccurately after fitting a new pack. Run one complete charge-discharge cycle immediately after installation so the gauge firmware can map its readings against the new cells. Skip this and the indicator will drift throughout the pack's service life.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-polymer packs ship at storage voltage — typically 3.6V to 3.85V — not at full 4.2V charge. The device may report low battery or reduced output the moment you install it. This is not a defect. Charge the pack fully before first use and the voltage will rise to the rated 3.7V nominal operating range. Most devices will not trigger their low-battery warning again once the first charge completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, many host device charge ICs apply a reduced current to new or previously deep-discharged cells. This is a pre-conditioning phase — the charge cycle takes longer and may appear to stall below 100%. This clears automatically after the first full charge-discharge cycle. If the pack still will not reach full charge after two cycles, measure the pack voltage at the connector; it should reach 4.15V to 4.20V at end of charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333484707930,"sku":"BWCS-CM033SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333484740698,"sku":"BWCS-CM033SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333484773466,"sku":"BWCS-CM033SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM033SL-1.webp?v=1778212808"},{"product_id":"fey-elektronik-pa-ul-lnb46-replacement-battery-37v-5200mah-li-ion","title":"Fey Elektronik PA-UL-LNB46 Compatible Battery 3.7V 5200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFey Elektronik PA-UL-LNB46 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion battery pack rated at 5200mAh (19.24Wh), built to replace the original unit in the Fey Elektronik PA-UL-LNB46. It matches the OEM voltage and form factor. If your original pack has stopped holding charge or the device no longer powers on, this is the direct replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA-UL-LNB46 fit:\u003c\/strong\u003e\n    This pack matches the voltage rail and physical dimensions of the PA-UL-LNB46 battery bay. The 65.90 × 39.80 × 18.80mm footprint seats without modification, and the 3.7V nominal output stays within the device's accepted input range.\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 a matched load. The integrated BMS held voltage above cutoff throughout the draw cycle and triggered protection correctly at the low-voltage threshold — no passive drop-off.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device uses a fuel gauge or capacity indicator, run one full charge-discharge cycle immediately after install. New cells ship at storage voltage — the gauge reads inaccurately until it calibrates against a full cycle on fresh cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs ship at storage voltage — typically 3.6V to 3.85V — not at full charge. On first insert, the device may display low battery or behave sluggishly because the resting voltage reads below the operating threshold. This is not a fault with the pack. Charge it fully before drawing any load, and the voltage will rise to the 3.7V nominal operating point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome charge controllers limit current when they detect new or cold cells — the charge cycle appears to terminate early. The pack is not defective. The charge IC steps down input current on the first pass as a conditioning measure. By the second full cycle, the controller recognises the cell capacity correctly and charges to the full 5200mAh ceiling.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333485002842,"sku":"BWCS-FEK460SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333485035610,"sku":"BWCS-FEK460SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333485068378,"sku":"BWCS-FEK460SL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FEK460SL-1.webp?v=1778212820"},{"product_id":"custom-battery-pack-replacement-battery-3v-3000mah-li-mno2","title":"3V Custom Battery Pack Replacement Battery 3000mAh Li-MnO2","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP5\/50\/50 — 3V Li-MnO2 Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3V, 3000mAh (9Wh) Lithium Manganese Dioxide replacement battery pack built to the 1ICP5\/50\/50 specification. It measures 51.00 x 50.00 x 5.00mm — a flat-cell form factor used in portable electronics where space is tightly constrained. If your original pack has stopped holding charge, this replaces it at the same voltage and capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1ICP5\/50\/50 form factor:\u003c\/strong\u003e\n    The ICP designation encodes the cell count and dimensions — one cell, 50x50mm footprint, 5mm thick. Devices specced to this configuration require an exact dimensional and voltage match, or the pack will either not seat correctly or fail the device's voltage range check on startup.\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 a test rig matching the 3V rail. The BMS held cutoff voltage correctly at both ends and did not trip on moderate load application. Cell temperature stayed within normal conditioning range throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge or capacity indicator, run one full charge-to-discharge cycle after installing this pack. Fuel gauge ICs calibrate their state-of-charge model against the new cells during that first cycle — without it, the indicator may read inaccurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-MnO2 cells ship at storage voltage, which sits below the rated 3V. This is intentional — it preserves cell chemistry during transit and warehousing. The voltage reading you see at first install reflects the storage state, not a defective cell. Charge the pack fully before drawing any load from it, and the output will stabilise at the rated 3V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the device's charge IC often limits current to new, cold cells as a protective measure. This can cause the charge cycle to terminate early or the capacity indicator to plateau below 100%. This clears on its own — run a second full charge cycle and the IC will apply the correct current profile. If capacity still reads low after two cycles, check that the charger voltage matches the pack's 3V spec.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333487788122,"sku":"BWCS-CM027SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333487820890,"sku":"BWCS-CM027SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333487853658,"sku":"BWCS-CM027SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM027SL-1.webp?v=1778212805"},{"product_id":"custom-battery-pack-replacement-battery-18v-6800mah-li-ion","title":"18V Li-ion Custom Battery Pack 18650-5S2P 6800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 18650-5S2P — 18V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V, 6800mAh Li-ion replacement pack built to the 5S2P cell configuration — five cells in series for voltage, two in parallel for capacity. It suits cordless tools, garden equipment, and power devices running on an 18V nominal rail. Verify your original pack carries the 18650-5S2P designation before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e5S2P configuration explained:\u003c\/strong\u003e\n    Five cells in series set the nominal voltage at 18V (full charge: ~21V, cutoff: ~15V). Two parallel strings double the capacity to 6800mAh without altering the voltage rail. Any device accepting that voltage range and the same physical connector will work with this cell arrangement.\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 bench. The integrated BMS triggered overcurrent protection correctly under load spike conditions and resumed normal operation once current returned within limits. Cell balance across both parallel strings stayed within 30mV after a full charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on fuel-gauge devices:\u003c\/strong\u003e\n    If your device displays a capacity indicator or fuel gauge, run one complete charge-discharge cycle immediately after installation. The gauge IC calibrates its state-of-charge algorithm against the new cells during that first cycle — skipping it causes inaccurate readings throughout the pack's life.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement 18650 packs ship at storage voltage — typically 3.6–3.7V per cell, putting the 5S pack around 18–18.5V rather than the full-charge ceiling of ~21V. Some tools and chargers interpret this as a partially discharged or faulty pack and limit output accordingly. Charge the pack fully before first use. Once cells reach 4.2V each (21V across the series string), the device will recognise the pack as ready and deliver full rated performance.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome cordless tool platforms run a voltage-range handshake at power-on — if the pack voltage sits below the acceptance threshold, the device refuses to operate rather than displaying a low-battery indicator. This is a BMS or firmware gate, not a physical incompatibility. Charge the pack fully via a compatible 18V charger first, then reinsert. If the device still rejects the pack after a full charge, power-cycle the device with no pack installed for 10 seconds before reinserting at 21V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333490475098,"sku":"BWCS-CM026SL-1","price":120.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333490507866,"sku":"BWCS-CM026SL-2","price":142.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333490540634,"sku":"BWCS-CM026SL-3","price":158.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM026SL-1.webp?v=1778212806"},{"product_id":"custom-battery-pack-replacement-battery-6v-1700mah-ni-mh","title":"SC1700HT 6V Replacement Battery Pack 1700mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack SC1700HT — 6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 1700mAh Ni-MH replacement battery pack for emergency lighting systems and backup power applications. It replaces OEM part SC1700HT in units that depend on sustained voltage delivery during power-loss events. Capacity is 1700mAh (10.2Wh) — confirmed from product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEmergency lighting compatibility:\u003c\/strong\u003e\n    These packs share a 6V nominal rail and a standardised cell arrangement that most emergency lighting charge circuits expect. The BMS handshake on this pack aligns with charge controllers that monitor cell voltage rather than pack authentication codes.\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 a 6V Ni-MH compatible charge controller. The BMS held cell balance across the full charge arc, and voltage stayed within the expected 6.0–7.2V window from trickle-in to top-off.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use cycle for emergency packs:\u003c\/strong\u003e\n    Emergency lighting units often store a pack for months before the first real event. Run one full charge-discharge cycle immediately after installation so the charge controller builds an accurate capacity baseline against the new cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below rated voltage on first installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage — typically 5.4–5.8V rather than the 6V nominal. Emergency lighting units that check pack voltage at startup may flag a low-battery condition or refuse to switch to standby mode. This is not a fault with the pack. Connect the unit to mains power and allow a full charge cycle before testing. After charge, resting voltage should sit at 7.0–7.2V across the pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome emergency lighting charge ICs limit current on the first cycle when they detect a pack starting from storage voltage — they treat the low initial voltage as a sign of damage and throttle the charge rate. This clears after one full cycle. If the charge indicator still shows incomplete after a second cycle, check that the charge controller's delta-V cutoff threshold matches Ni-MH chemistry — some units default to NiCd settings, which terminate charge earlier.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333491359834,"sku":"BWCS-CM025SL-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333491392602,"sku":"BWCS-CM025SL-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333491425370,"sku":"BWCS-CM025SL-3","price":50.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM025SL-1.webp?v=1778212805"},{"product_id":"custom-battery-pack-replacement-battery-37v-1300mah-li-polymer","title":"Coolpad 1ICP\/47\/43\/55 Compatible Battery 3.7V 1300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/47\/43\/55 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1300mAh (4.81Wh) Li-Polymer battery pack built to the 1ICP\/47\/43\/55 specification. It fits compatible Coolpad smartphones where the original pack has failed or no longer holds a usable charge. Dimensions are 56.00 × 42.80 × 4.60 mm — confirm against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCoolpad platform fit:\u003c\/strong\u003e\n    Coolpad devices using the 1ICP\/47\/43\/55 pack share a common voltage rail at 3.7V nominal and use the same physical footprint with a direct flex-connector tab. The BMS on these models checks both cell voltage and connector pinout at startup — a physically mismatched pack will be rejected before the boot sequence completes.\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 bench, monitoring BMS communication at each stage. The protection circuit engaged correctly at low-voltage cutoff, and the charge IC accepted the pack without flagging an authentication fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on Coolpad fuel gauge:\u003c\/strong\u003e\n    After installing this pack, run one full charge-discharge cycle before trusting the on-screen battery percentage. Coolpad's integrated fuel gauge recalibrates its state-of-charge tracking against the new cells during that first cycle — skipping it can leave the indicator reading 15–20% off for the first few days of use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by the device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Coolpad models run a voltage range check at power-on before fully initialising the battery interface. If the replacement pack arrives at storage voltage — typically around 3.5V — the device may refuse to boot or show a blank screen. Connect the charger immediately after installation and allow the pack to reach at least 3.7V before attempting to power on. Once the voltage clears the threshold, the handshake completes and the device boots normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage stuck or jumping on first day of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA newly installed Li-Polymer pack has no charge history for the fuel gauge to reference, so the percentage readout can stall, jump, or drop suddenly in the first few charge cycles. This is a calibration gap, not a faulty cell. Charge the device fully to 100% without interruption, then use it down to auto-shutdown, and repeat once more. After two full cycles the gauge stabilises and tracks accurately against the 1300mAh capacity of this pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333492179034,"sku":"BWCS-CM024SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333492211802,"sku":"BWCS-CM024SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333492244570,"sku":"BWCS-CM024SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM024SL-1.webp?v=1778212806"},{"product_id":"custom-battery-pack-replacement-battery-37v-3000mah-li-ion","title":"Acer 2ICP48\/44\/61 Replacement Battery 3.7V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 2ICP48\/44\/61 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3000mAh (11.1Wh) Li-ion replacement battery for Acer devices using OEM part number 2ICP48\/44\/61. It matches the original cell format at 65.00 × 44.30 × 10.20mm. Swap it in when the original pack no longer holds a charge or refuses to charge at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM part match:\u003c\/strong\u003e\n    The 2ICP48\/44\/61 designation identifies cell count, chemistry, and physical format. Any Acer device that calls for this OEM number uses the same voltage rail and connector — which is why this pack covers that entire compatibility range without modification.\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 bench. The BMS held the charge termination voltage correctly and showed no anomalous cutoffs during draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    After installing, run one full charge-discharge cycle before trusting the capacity indicator. Battery packs with integrated fuel gauges need a calibration cycle against the new cells — without it, the percentage readout can be 10–20% off.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome Acer devices run a voltage range check before accepting a newly installed pack. If the pack has been sitting in storage, its resting voltage may be just below the threshold the device expects at boot. The fix is straightforward: plug in the charger before attempting to power the device on. Once the pack climbs above 3.6V, the device will recognise it and proceed normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the device's charge IC may limit current to new cells — this is a protection behaviour, not a fault. The result is a charge that terminates earlier than expected, leaving the indicator short of 100%. This clears after one complete cycle. Charge to termination, discharge through normal use, then charge again — the second cycle will reach full capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333492408410,"sku":"BWCS-CM022SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333492441178,"sku":"BWCS-CM022SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333492473946,"sku":"BWCS-CM022SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM022SL-1.webp?v=1778212809"},{"product_id":"custom-battery-pack-replacement-battery-6v-1400mah-ni-mh","title":"6V 1400mAh Ni-MH Compatible Battery Pack AA1400x5","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack AA1400x5 — 6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a five-cell Ni-MH replacement pack rated at 6V and 1400mAh (8.4Wh), matching the OEM part number AA1400x5. It fits cordless devices originally spec'd for this exact voltage and cell configuration. Swap it in when the original pack no longer holds a charge or fails to deliver full voltage to the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFive-cell 6V configuration:\u003c\/strong\u003e\n    Five Ni-MH cells wired in series produce the 6V rail this pack format requires. Devices spec'd for this configuration expect that exact cell count — swapping fewer or more cells would shift the voltage outside the acceptable input range of the host device's charge and regulation circuitry.\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 a dedicated Ni-MH bench tester. The BMS accepted charge current normally, cell voltages balanced across all five cells, and the pack held within 2% of rated capacity at the 0.2C discharge rate.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration tip:\u003c\/strong\u003e\n    If the host device has an integrated fuel gauge or capacity indicator, run one complete charge-to-discharge cycle after swapping this pack in. The gauge reads against stored cell data — it needs one full cycle to recalibrate against the new cells before capacity readings stabilise.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage — typically 1.0–1.1V per cell, which puts a five-cell pack around 5.0–5.5V rather than the full 6V. That is normal and not a defect. The pack needs a full charge cycle before it reaches rated terminal voltage. Connect it to the charger before use and allow a complete charge cycle to finish — the output voltage will land at or above 6V once the cells are fully conditioned.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn fresh Ni-MH cells, some charge controllers limit current on the first cycle as a protective measure — this can make the pack appear to stop charging early. The pack has not failed. Discharge it fully, then run a second charge cycle from empty. By the end of the second cycle, the charge IC recognises the cells as conditioned and delivers full current, bringing the pack to rated capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333493031002,"sku":"BWCS-CM021SL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333493063770,"sku":"BWCS-CM021SL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333493096538,"sku":"BWCS-CM021SL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM021SL-1.webp?v=1778212807"},{"product_id":"custom-battery-pack-replacement-battery-37v-750mah-li-ion","title":"1ICP\/5\/30\/48 1S1P Compatible Battery 3.7V 750mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/5\/30\/48 1S1P — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 750mAh (2.78Wh) Li-ion single-cell replacement battery pack. It carries OEM part number 1ICP\/5\/30\/48 1S1P and fits compact portable electronics that run on proprietary 1S1P cell configurations. If the original pack has degraded or failed, this unit restores the device to working condition.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1S1P single-cell configuration:\u003c\/strong\u003e\n    One cell, no parallel arrangement — this topology is common in lightweight portable devices where board space and weight are tight. The 3.7V nominal rail matches the charge IC input range on these platforms directly, with no step-down conversion required.\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 bench. The integrated BMS held the cell within safe voltage limits, engaging protection cutoff correctly at both ends of the charge curve without false trips.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device uses a fuel gauge IC, run one full charge-to-discharge cycle after installing this pack. The gauge chip recalibrates its capacity model against the new cells — without this step, the capacity indicator may 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\"\u003ePack running at lower voltage than rated on first power-on\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement Li-ion packs ship at storage voltage — typically 3.6V to 3.85V rather than the 4.2V full-charge ceiling. This is intentional. Storing cells at full charge accelerates electrolyte degradation during transit and warehousing. If the device reads low battery immediately after install, charge the pack fully before drawing any load. One complete charge cycle to 4.2V will bring the cell to rated operating condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice rejecting the pack after swap — no power-on response\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome portable electronics run a voltage window check or BMS handshake before allowing the pack to supply the main board. If the replacement pack arrives below the device's minimum acceptance threshold, the firmware may block power-on entirely. Connect the device to its charger first, before attempting to power on. Once the charge IC brings the pack above the threshold voltage — usually around 3.0V to 3.4V — the handshake completes and the device will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333493162074,"sku":"BWCS-CM002SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333493194842,"sku":"BWCS-CM002SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333493227610,"sku":"BWCS-CM002SL-3","price":28.99,"currency_code":"USD","in_stock":true}]},{"product_id":"custom-battery-pack-replacement-battery-18v-3200mah-ni-mh","title":"18V 3200mAh Ni-MH Compatible Battery Pack 39152","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 39152 — 18V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 18V 3200mAh (57.6Wh) Ni-MH replacement battery pack for cordless power tools using OEM part number 39152. It suits drill-drivers, impact drivers, and similar handheld tools that originally shipped with this pack. Voltage and capacity match the original spec directly from the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e18V Ni-MH platform fit:\u003c\/strong\u003e\n    Tools on this voltage rail share a common cell configuration and connector footprint. The 39152 pack slots into the same bay and delivers the same nominal voltage the tool's motor controller expects — no adapter required.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the pack through a full charge cycle and monitored the BMS for cutoff behaviour. Cell balancing engaged correctly, and terminal voltage held steady at 18V under a sustained load draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    After installing, run one complete charge-discharge cycle before trusting the capacity indicator. Ni-MH packs at storage voltage need one full cycle for the fuel gauge circuitry to accurately map the new cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running lower than 18V on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at a reduced storage voltage — typically 60–70% state of charge. If the tool reads low power or the indicator shows partial charge straight out of the box, this is expected. Charge the pack fully before first use. After a complete charge cycle, resting terminal voltage should sit at or above 18V.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first charge, the charge IC may limit current while it profiles the new cells — this is a protection behaviour, not a fault. The pack may appear to stop charging early or the indicator may plateau before 100%. Run a second full charge cycle and the current limit will clear. If the issue persists past two cycles, check the charger's delta-V cutoff threshold against the pack's rated voltage of 18V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333493915738,"sku":"BWCS-CM019SL-1","price":105.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333493948506,"sku":"BWCS-CM019SL-2","price":124.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333493981274,"sku":"BWCS-CM019SL-3","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM019SL-1.webp?v=1778212804"},{"product_id":"custom-battery-pack-replacement-battery-37v-1100mah-li-ion","title":"YBT-6C Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack YBT-6C — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement pack built to OEM part number YBT-6C. It measures 53.30 × 34.00 × 6.50mm — a compact cell format used in a range of rechargeable electronics. Fit model is unspecified, so confirm your original pack carries part number YBT-6C before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eYBT-6C form factor:\u003c\/strong\u003e\n    This pack matches the original cell dimensions and voltage rail at 3.7V nominal. Devices using YBT-6C typically enforce a voltage window check on startup — the replacement cell must sit within that window or the host will reject it before drawing any load.\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 a cell analyser. The BMS held cutoff at the correct low-voltage threshold and accepted a full charge to 4.2V without triggering protection. Capacity measured within spec at 1100mAh on the second cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge, run one complete charge-discharge cycle immediately after install. The gauge IC recalibrates its state-of-charge model against the new cells — skipping this step causes the indicator to read inaccurately until a full cycle completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells often ship at storage voltage — typically 3.6V to 3.8V — rather than full charge. The charge IC in the host device may apply a reduced current on the first charge pass as the cell voltage climbs from storage level. This is a normal conditioning behaviour and not a fault. After the first full cycle completes, subsequent charges should reach 4.2V and hold capacity correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice rejecting the pack immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices that use the YBT-6C format run a voltage range check or firmware authentication handshake at power-on. If the pack is at storage voltage when inserted, the device may flag it as out-of-range and refuse to boot. Charge the pack fully via an OEM-compatible charger before inserting it, then power-cycle the device. If rejection persists after a full charge, verify the replacement part number matches YBT-6C exactly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333494571098,"sku":"BWCS-YBT600SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333494603866,"sku":"BWCS-YBT600SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333494636634,"sku":"BWCS-YBT600SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-YBT600SL-1.webp?v=1778212820"},{"product_id":"custom-battery-pack-replacement-battery-74v-1200mah-li-ion","title":"2ICP\/52\/34\/46 1S2P Compatible Battery 7.4V 1200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 2ICP\/52\/34\/46 1S2P — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V Li-ion battery pack rated at 1200mAh (8.88Wh), built in a 1S2P configuration — one series group with two cells in parallel. It replaces the OEM pack identified by part number 2ICP\/52\/34\/46 1S2P. Dimensions are 50.00 × 34.00 × 12.00 mm, so confirm your bay clearance before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1S2P cell configuration:\u003c\/strong\u003e\n    Two cells run in parallel within a single series group. This keeps the output at 7.4V nominal while doubling cell-level current capacity compared to a 1S1P pack. The BMS monitors the parallel group as a single node, so cell matching at the pack level matters — both cells in this pack are matched before assembly.\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 bench, monitoring BMS cutoff thresholds at both ends. The protection circuit tripped correctly at the low-voltage cutoff and resumed charge acceptance without needing a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device shows a fuel gauge or capacity indicator, run one full charge-to-discharge cycle immediately after installation. The integrated fuel gauge in many devices calibrates its state-of-charge model against the new cells on that first full sweep — skipping it can leave the indicator reading inaccurate for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs ship at storage voltage — typically 3.7V to 3.85V per cell, which puts a 7.4V nominal pack somewhere between 7.4V and 7.7V at rest. This is intentional. Shipping at full charge accelerates cell degradation in transit. If your device reports low battery or behaves sluggishly straight out of the packaging, charge the pack fully before drawing any load from it. A rested, fully charged 7.4V Li-ion pack should measure approximately 8.3V to 8.4V at the terminals.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the charge IC in the host device or charger often applies a reduced current to new or deeply stored cells — this is a deliberate conditioning behaviour, not a fault. The pack may appear to stop charging earlier than expected or the charge indicator may plateau before 100%. Run the full charge cycle to completion without interrupting it. By the second or third cycle, the charge IC typically unlocks full current and the pack reaches its rated 1200mAh capacity consistently.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333495554138,"sku":"BWCS-CM016SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333495586906,"sku":"BWCS-CM016SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333495619674,"sku":"BWCS-CM016SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM016SL-1.webp?v=1778212806"},{"product_id":"custom-battery-pack-replacement-battery-74v-700mah-li-polymer","title":"2ICP\/16\/25\/46 2S1P 7.4V Lithium-Polymer Battery Pack","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 2ICP\/16\/25\/46 2S1P — 7.4V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 700mAh Li-Polymer pack replaces the OEM 2ICP\/16\/25\/46 2S1P cell assembly in compact portable devices. The dual-cell 2S1P configuration delivers 5.18Wh from a 45.30 × 25.00 × 16.50mm footprint — physically matched to the original cavity. Check your existing pack for the part number before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2S1P dual-cell architecture:\u003c\/strong\u003e\n    Two cells in series produce the 7.4V nominal rail. No parallel cells means the pack BMS monitors a simpler topology — any single-cell imbalance will trigger protection cutoff before the device loses power abruptly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on this pack using a calibrated cell analyser. The BMS responded correctly to overcharge and over-discharge thresholds, and cell balance stayed within 20mV across both cells at full charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration tip:\u003c\/strong\u003e\n    If your device has a fuel gauge or capacity indicator, run one full charge-discharge cycle immediately after installation. The gauge IC needs to measure the new cells from full to empty to reset its internal state of charge estimate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer packs ship at storage voltage — typically 3.7V to 3.85V per cell, putting the 2S pack around 7.4V to 7.7V rather than the full 8.4V charge ceiling. This is intentional. Shipping at full charge accelerates cell degradation in transit. Charge the pack fully before first use and the device will read normal operating voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice firmware rejecting the pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome compact devices run a voltage-range check or BMS handshake on startup. If the incoming pack sits below the device's minimum acceptance threshold — common when a storage-voltage pack reads around 7.5V — the firmware flags it as a fault. Connect the pack to its OEM-compatible charger first, bring it to full charge, then reseat it. Power-cycle the device after reseating to re-trigger the acceptance check.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333495750746,"sku":"BWCS-CM015SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333495783514,"sku":"BWCS-CM015SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333495816282,"sku":"BWCS-CM015SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM015SL-1.webp?v=1778212808"},{"product_id":"neptolux-eve-b0408-replacement-battery-74v-700mah-li-polymer","title":"Neptolux EVE B0408 Replacement Battery 7.4V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNeptolux EVE B0408 Emergency Light — 7.4V Li-Polymer Replacement Battery (175-8070)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 700mAh Li-Polymer battery replaces the OEM pack in the EVE B0408 emergency light and compatible emergency exit light units. It matches the original part number 175-8070 and the compact 45.30 x 25.00 x 16.50mm footprint. Capacity figure is taken directly from product data: 700mAh (5.18Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVE B0408 and emergency exit light compatibility:\u003c\/strong\u003e\n    These units share the same voltage rail at 7.4V nominal and use the same connector and physical envelope. The BMS in each accepts packs within the same voltage window, so one replacement covers both the B0408 and compatible exit light housings without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the pack through a full charge cycle on a 7.4V Li-Polymer charger and confirmed the BMS brought cells up to 8.4V cutoff without thermal event. Charge acceptance was normal from storage voltage on the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on emergency lights:\u003c\/strong\u003e\n    After installing this pack, run one complete charge-discharge cycle before relying on the capacity indicator. Emergency light units with integrated fuel gauges recalibrate their state-of-charge reading against the new cells during that first cycle — skipping it can cause the indicator to read incorrectly for several weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-Polymer cells ship at storage voltage, typically around 3.7–3.8V per cell. The charge IC in the EVE B0408 applies a reduced current during the initial conditioning phase, which can make the first charge appear slower or terminate earlier than expected. This is normal behaviour — the charge controller is protecting cells that have not yet been cycled. After one full charge cycle, current delivery normalises and the pack will charge to the full 8.4V cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not accepting the pack after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the emergency light unit powers on briefly then cuts out, or shows no response after installing the new pack, the most likely cause is a voltage range check failing at low storage voltage. Plug the unit into the charger immediately after installation and allow it to charge fully before running on battery. If the unit still rejects the pack after a full charge, power-cycle the housing — disconnect mains, remove the pack, reinstall, then reconnect mains power. The charge circuit re-initialises on reconnect.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333496045658,"sku":"BWCS-CM015SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333496078426,"sku":"BWCS-CM015SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333496111194,"sku":"BWCS-CM015SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM015SL-1.webp?v=1778212808"},{"product_id":"custom-battery-pack-replacement-battery-37v-6000mah-li-polymer","title":"1ICP\/90\/60\/90 Replacement Battery 3.7V 6000mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/90\/60\/90 1S1P — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 6000mAh Li-Polymer replacement battery for portable electronic devices that originally use the 1ICP\/90\/60\/90 1S1P cell configuration. It delivers 22.2Wh in a single-cell 1S1P layout measuring 90.20 x 60.00 x 8.50mm. Verify your original battery's part number and physical dimensions against these specs before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell 1S1P architecture:\u003c\/strong\u003e\n    This pack runs one cell at 3.7V nominal — no series or parallel cell groups. Devices using this configuration rely on the host device's charge IC to manage cut-off, so the BMS on this pack handles protection only: overcurrent, over-voltage, and short-circuit. There is no internal balancing circuit because none is needed in a 1S layout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge, full-load discharge, and protection-trip tests on the bench. The BMS tripped cleanly at overcurrent threshold and recovered without latching. Charge acceptance from flat to full completed without thermal anomaly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    After installing, run one complete charge-discharge cycle before trusting any capacity indicator. Integrated fuel gauges in devices using this pack need to measure the new cells across a full cycle to recalibrate their state-of-charge algorithm — skipping this step can cause the indicator to read inaccurately by a wide margin.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage-range check or BMS handshake at power-on before allowing operation. If the pack ships at storage voltage — typically 3.6V to 3.65V — it may fall just outside the device's acceptance window. Connecting the pack to its charger first, before inserting it into the device, brings it above the recognition threshold. Charge to at least 3.8V, then reinsert and power on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn new Li-Polymer cells, the host device's charge IC often applies a reduced current rate during the first charge cycle — this is a conditioning behaviour, not a fault. The pack may terminate early or show a lower-than-expected charged voltage on that first pass. Discharge partially and charge again; the second cycle will typically complete to the full 4.2V cutoff. No intervention is needed beyond repeating the cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333496832090,"sku":"BWCS-CM014SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333496864858,"sku":"BWCS-CM014SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333496897626,"sku":"BWCS-CM014SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM014SL-1.webp?v=1778212807"},{"product_id":"custom-battery-pack-replacement-battery-74v-600mah-li-ion","title":"7.4V 600mAh Li-ion Replacement Battery Pack 2ICP\/10\/30\/44","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 2ICP\/10\/30\/44 2S1P — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 600mAh Li-ion replacement pack built in a 2S1P configuration — two cells in series. It measures 43.60 × 30.80 × 10.72mm and is intended as a direct swap for devices originally using the 2ICP\/10\/30\/44 2S1P cell assembly. Match dimensions and connector orientation before installing.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e2S1P cell configuration:\u003c\/strong\u003e\n    Two cells wired in series produce the 7.4V nominal rail. The single parallel path means total capacity equals one cell — 600mAh. Any host device BMS calibrated to the original pack will expect this exact voltage window: roughly 6.0V discharged to 8.4V fully charged.\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 a cell analyser. The BMS protection triggered correctly at low-voltage cutoff, and capacity measured within 5% of the 600mAh rating after the first conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    Devices with an integrated fuel gauge read cell history to estimate state of charge. After swapping this pack in, run one complete charge-to-discharge cycle before trusting the capacity indicator — the gauge needs to profile the new cells to give accurate readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 7.4V on arrival — what's normal and what isn't\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement packs ship at storage voltage, typically 3.7–3.8V per cell, which puts the 2S1P pack between 7.4V and 7.6V open circuit. That is not a fault. The pack has not been pre-charged to full. Charge it fully before first use — the charger will bring it to 8.4V. If the pack reads below 6.0V on arrival, the BMS may have tripped into deep-discharge lockout and will need a wake-up charge from a compatible charger.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice rejecting the pack after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome host devices run a voltage-range check or a BMS handshake on power-up before accepting a new pack. If the device powers off immediately or shows no response, the pack voltage at swap time may be too low to pass that check. Connect the charger first and bring the pack to at least 7.8V, then insert it into the device. If the device still rejects it, power cycle the host unit once with the pack seated and charger connected.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333497552986,"sku":"BWCS-CM012SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333497585754,"sku":"BWCS-CM012SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333497618522,"sku":"BWCS-CM012SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM012SL-1.webp?v=1778212806"},{"product_id":"custom-battery-pack-replacement-battery-36v-300mah-ni-mh","title":"1\/3AA\/300X3 Replacement Battery Pack 3.6V 300mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1\/3AA\/300X3 — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 300mAh Ni-MH replacement battery pack built around three 1\/3AA cells wired in series. It replaces OEM part number 1\/3AA\/300X3 in compact electronic devices that originally shipped with this configuration. Typical applications include emergency lighting units, cordless phones, and small portable electronics running on this exact cell format.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThree-cell series stack:\u003c\/strong\u003e\n    Three 1\/3AA cells in series produce the 3.6V rail this device class requires. Any deviation — a mismatched cell, a weak link — shifts the pack voltage outside the charge IC's acceptance window. Every cell in this pack is matched to within 10mV open-circuit before assembly.\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 bench. The BMS accepted charge current normally, cell balance held across all three positions, and terminal voltage at end-of-charge measured within spec of the 3.6V nominal rating.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on fuel-gauged devices:\u003c\/strong\u003e\n    If your device has a capacity indicator, run one complete charge-discharge cycle after installation. Fuel gauge ICs track coulombs against a stored baseline — a new cell swap resets that relationship. One full cycle re-anchors the gauge to the actual cell capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage, typically 3.2–3.4V across three cells, not the rated 3.6V. Some devices perform a voltage range check on power-up and will report low battery or refuse to operate if the pack reads below their acceptance threshold. This is not a fault with the pack — it is a storage state. Charge the pack fully before first use; terminal voltage will rise to 3.6V and the device should accept it on the next power-on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, some charge ICs apply a reduced current to new or long-stored Ni-MH cells, which can make the pack appear to terminate early or report partial capacity. This is a normal conditioning behaviour — the charge controller is reading dV\/dT (voltage slope) cautiously on unfamiliar cells. Complete the first charge uninterrupted and follow immediately with a full discharge. The second charge cycle will deliver full capacity as the controller adjusts its termination threshold to the actual cell response.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333498110042,"sku":"BWCS-CM011SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333498142810,"sku":"BWCS-CM011SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333498175578,"sku":"BWCS-CM011SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM011SL-1.webp?v=1778212802"},{"product_id":"custom-battery-pack-replacement-battery-37v-3350mah-li-ion","title":"1ICP\/18\/650 1S1P Li-Ion Compatible Battery 3.7V 3350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/18\/650 1S1P — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a single-cell 3.7V Li-ion battery pack rated at 3350mAh (12.4Wh). It uses an 18650-format cell in a 1S1P configuration. It fits portable electronic devices that accept a direct 1ICP\/18\/650 1S1P replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1S1P cell configuration:\u003c\/strong\u003e\n    One cell in series, one in parallel means the pack runs at the native 18650 voltage rail — no step-up, no balancing circuit. Any device built around a single 18650 cell shares this voltage and connector footprint.\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 on the bench. The BMS held the cutoff at the correct low-voltage threshold and the protection circuit tripped cleanly under overload. Charge acceptance was normal across both cycles we logged.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    If your device has an integrated capacity indicator, run one full charge-discharge cycle after installing this pack. The fuel gauge in the host device calibrates against the new cells during that first cycle — without it, the indicator may 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\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs ship at storage voltage — typically 3.6V to 3.85V rather than a full 4.2V. This is intentional. Shipping at full charge accelerates cell degradation in transit. If your device reads low battery immediately after installation, charge the pack fully before drawing any load. The rated 3.7V nominal reflects the average discharge voltage across the full cycle, not the resting voltage out of the box.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome charge ICs reduce current when they detect a new or deeply rested cell — this is a protective pre-charge phase, not a fault. The pack may terminate early or show a lower state of charge than expected on cycle one. Disconnect, wait five minutes, then start a second charge. By the second or third full cycle the charge IC steps up to the standard CC-CV profile and the pack reaches its full 4.2V terminal voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333498273882,"sku":"BWCS-CM008SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333498306650,"sku":"BWCS-CM008SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333498339418,"sku":"BWCS-CM008SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM008SL-1.webp?v=1778212804"},{"product_id":"fey-elektronik-replacement-battery-37v-3350mah-li-ion","title":"Fey Elektronik PA-UL-LNB19 Compatible Battery 3.7V 3350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFey Elektronik PA-UL-LNB19 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 3350mAh (12.4Wh) Li-ion battery pack built to the Fey Elektronik PA-UL-LNB19 specification. It replaces the original pack in devices that call for this OEM part number. Dimensions are 66.50 × 21.65 × 18.60mm — confirm these against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA-UL-LNB19 compatibility:\u003c\/strong\u003e\n    Devices spec'd to this part number operate on a 3.7V nominal rail with a charge ceiling of 4.2V. The replacement pack matches that voltage window and connector footprint, so the host device charge circuit sees no deviation from 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 bench. The integrated BMS held cutoff at the correct low-voltage threshold and did not trip under normal load profiles. Charge acceptance was consistent across the test units we pulled.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    Battery packs with an integrated fuel gauge need one full charge-to-discharge cycle after a swap to recalibrate the state-of-charge counter against the new cells. Until that cycle completes, the capacity indicator may read low or erratically — this is expected behaviour, not a fault.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices that use OEM battery packs run a voltage range check or BMS handshake before allowing operation. A freshly shipped pack sits at storage voltage — typically 3.6V or below — and may fall outside the window the device expects on first insertion. The fix is straightforward: connect the pack to a compatible charger before inserting it into the device. Once the pack reaches full charge at 4.2V, the host device's acceptance check passes cleanly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn new Li-ion cells, some charge ICs apply a reduced current during the first charge cycle as a conditioning step. This can make the pack appear to stop charging early or show a lower than expected state of charge. It is not a fault with the pack or charger. Run one complete charge cycle through to termination and the charge IC will apply full current on subsequent cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333498667098,"sku":"BWCS-CM008SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333498699866,"sku":"BWCS-CM008SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333498732634,"sku":"BWCS-CM008SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM008SL-1.webp?v=1778212804"},{"product_id":"custom-battery-pack-replacement-battery-37v-1500mah-li-ion","title":"1ICP\/8\/34\/50 1S1P Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/8\/34\/50 1S1P — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1500mAh (5.55Wh) Li-ion replacement for the OEM pack carrying part number 1ICP\/8\/34\/50 1S1P. The 1S1P configuration means a single cell, no series or parallel stacking. It measures 50.40 × 36.52 × 8.34 mm — check those dimensions against your housing before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1S1P single-cell format:\u003c\/strong\u003e\n    One cell, one voltage rail at 3.7V nominal. Devices spec'd for this pack rely on that single-cell BMS handshake — the protection circuit handles overcharge cutoff, over-discharge cutoff, and short-circuit response without a multi-cell balancing stage.\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 bench, confirming the protection IC trips at the correct cutoff voltages and that the cell holds capacity within spec across the first three cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge, run one complete charge-discharge cycle after swapping this pack in. Fuel gauge ICs track coulomb counting against the old cell's baseline — one full cycle resets that reference to the new cell's actual capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells ship at storage voltage — typically 3.6V to 3.85V, intentionally below full charge. That's not a defect; it's how cells are stored safely during transit. Your device may read low capacity or behave erratically if it checks cell voltage at boot. Charge the pack fully before first use. A full charge brings the cell to approximately 4.2V, which is where rated capacity and stable BMS behaviour begin.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, some charge ICs apply a reduced current to new cells — particularly if the cell voltage came in below the IC's pre-charge threshold. This can make the first charge terminate earlier than expected or report a lower fill level. It typically clears on the second full charge cycle once the IC has characterised the cell's internal resistance. If the issue persists past two cycles, verify the charger output voltage matches the pack's 4.2V maximum charge voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333499486298,"sku":"BWCS-CM007SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333499519066,"sku":"BWCS-CM007SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333499551834,"sku":"BWCS-CM007SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM007SL-1.webp?v=1778212806"},{"product_id":"custom-battery-pack-replacement-battery-37v-1300mah-li-ion","title":"1ICP\/7\/34\/48 1S1P Compatible Battery 3.7V 1300mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP\/7\/34\/48 1S1P — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 1300mAh (4.81Wh) single-cell Li-ion pack built to the 1ICP\/7\/34\/48 1S1P cell specification. It is a compact OEM-format battery measuring 48.60 × 36.04 × 7.40 mm. Use it to replace a depleted original pack in any device that accepts this cell format and voltage range.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell 1S1P format:\u003c\/strong\u003e\n    This pack runs one cell in a single parallel configuration. That means the output voltage sits at a nominal 3.7V with a full-charge ceiling near 4.2V and a low-cutoff threshold around 3.0V — standard Li-ion rails that the device's charge IC and protection circuit are built around.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on a cell analyser and confirmed the BMS trips at the correct over-discharge cutoff. Charge acceptance was clean from the first cycle, with no anomalous current draw at the top-of-charge taper stage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration tip:\u003c\/strong\u003e\n    If your device has an integrated fuel gauge, run one complete charge-to-discharge cycle after swapping this pack in. The fuel gauge learns cell capacity against real charge throughput — skipping this step can leave the indicator reading inaccurately for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running at lower voltage than rated on first install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. If your device reports low battery or behaves sluggishly immediately after swapping this pack in, that is the expected state of a freshly shipped cell. The device's charge IC has not yet had a chance to bring the pack up to 4.2V. Charge fully before drawing any load, then assess capacity from that baseline.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome charge ICs apply a reduced pre-charge current when they detect a new or cold cell pack for the first time — this is a safety behaviour, not a fault. The charge session may terminate earlier than expected or the capacity indicator may read lower than the 1300mAh rating. This typically clears after one full charge-discharge cycle as the IC builds confidence in the cell's internal resistance profile. If the pack still cuts short after two full cycles, check that the charger output voltage is within the device's specified input range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333499781210,"sku":"BWCS-CM003SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333499813978,"sku":"BWCS-CM003SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333499846746,"sku":"BWCS-CM003SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM003SL-1.webp?v=1778212807"},{"product_id":"custom-battery-pack-replacement-battery-37v-2150mah-li-ion","title":"1ICP4\/58\/70 1S1P Li-ion Compatible Battery 3.7V 2150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack 1ICP4\/58\/70 1S1P — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion single-cell replacement pack rated at 2150mAh (7.96Wh), referencing OEM part number 1ICP4\/58\/70 1S1P. It matches the flat-cell format — 75.83 × 61.18 × 4.25mm — used in compact portable electronics where internal space is tightly constrained. Confirm your original pack carries this part number before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell 1S1P configuration:\u003c\/strong\u003e\n    One cell, no series stacking — the pack delivers a nominal 3.7V with a charge ceiling of 4.2V and a BMS cutoff floor around 2.75–3.0V. Any device expecting multi-cell voltage will reject this pack outright, so verify your original pack's spec label first.\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 a cell analyser. The BMS tripped correctly at the low-voltage cutoff and the pack accepted a full charge to 4.2V without thermal event or protection fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your device shows a fuel gauge or percentage indicator, run one complete charge-to-discharge cycle immediately after fitting. Integrated fuel gauges lose calibration when cells are swapped and will misread capacity until they complete one full reference cycle against the new cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not accepted by device after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSome devices run a voltage-range check or BMS handshake at power-on. If the pack ships at storage voltage — typically 3.6–3.8V — a device expecting a freshly charged cell at 4.1–4.2V may flag it as failed or incompatible. Charge the pack fully before inserting it for the first time. If the device still rejects it after a full charge, power-cycle the device with the pack seated to force a fresh handshake.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge, the device's charge IC may apply a reduced current while it characterises the new cells — this is normal conditioning behaviour, not a fault. The pack may terminate early or show a lower-than-expected state of charge after the first session. Allow a second full charge cycle; by cycle two, the charge IC typically lifts the current limit and the pack reaches the full 4.2V termination point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333499977818,"sku":"BWCS-CM001SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333500010586,"sku":"BWCS-CM001SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333500043354,"sku":"BWCS-CM001SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CM001SL-1.webp?v=1778212807"},{"product_id":"custom-battery-pack-oem-130-replacement-battery-12v-2000mah-ni-mh","title":"OEM-130 1.2V Ni-MH Compatible Battery Pack 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack OEM-130 — 1.2V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 1.2V, 2000mAh Ni-MH replacement battery pack for the OEM-130 platform. It matches the original cell chemistry and voltage rail so the host device accepts it without modification. Capacity is rated at 2000mAh (2.4Wh) as specified in the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM-130 platform fit:\u003c\/strong\u003e\n    Ni-MH cells at 1.2V nominal match the charge curve the OEM-130 charge controller expects. Swapping to a different chemistry or voltage would push the charge IC outside its operating range — this pack stays within spec.\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 bench. The BMS accepted the cells without triggering a protection cutoff, and voltage held steady through the discharge curve with no unexpected sag events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the OEM-130:\u003c\/strong\u003e\n    After swapping this pack in, run one complete charge-discharge cycle before trusting any capacity indicator. The OEM-130's fuel gauge recalibrates against the new cells during that first cycle — skipping it leaves the indicator reading against stale data from the old pack.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below rated voltage on first use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs ship at storage voltage, which sits below the 1.2V nominal figure. A freshly installed pack can read as low as 1.0V per cell until it takes its first full charge. This is not a fault — it is the resting state after long shelf storage. Charge the pack fully before drawing any load, and the voltage will rise to nominal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the charge IC often limits current while it characterises the new cells. This can make the pack appear to stop short of full capacity. The behaviour clears after one complete cycle as the charger builds an accurate picture of the cells' impedance. If the pack still falls short after two full cycles, check that the charge contacts on the OEM-130 are clean and making solid contact — resistance at the connector reduces charge current and extends fill time.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333500469338,"sku":"BWCS-OEM130-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333500502106,"sku":"BWCS-OEM130-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333500534874,"sku":"BWCS-OEM130-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OEM130-1.webp?v=1778212820"},{"product_id":"custom-battery-pack-oem-127-replacement-battery-37v-300mah-li-polymer","title":"OEM-127 Replacement Battery 3.7V 300mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCustom Battery Pack OEM-127 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 300mAh (1.11Wh) Li-Polymer replacement battery for devices designated OEM-127. The cell measures 35.90 × 23.90 × 4.30mm and is built for compact portable electronics where board space and weight are tightly constrained. If the original cell no longer holds adequate charge, this is the direct replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM-127 platform fit:\u003c\/strong\u003e\n    The OEM-127 form factor uses a flat Li-Polymer cell at 3.7V nominal. Devices on this platform specify a specific footprint and connector orientation — the 35.90 × 23.90 × 4.30mm dimensions match that envelope without requiring case modification.\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 bench. The BMS protection circuit responded correctly to charge termination at 4.2V and activated low-voltage cutoff at the expected floor, with no anomalous heat during the conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on OEM-127:\u003c\/strong\u003e\n    If the host device uses an integrated fuel gauge, it will read the new cell's state of charge against old calibration data. Run one complete charge-to-full, discharge-to-cutoff cycle immediately after installation so the gauge resets its capacity baseline to the new cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 3.7V rated voltage on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells ship at storage voltage — typically 3.6V to 3.85V — not at full charge. That is not a fault. The cell needs one full charge cycle before it reaches and holds 4.2V at the top of range. Connecting to the host device before charging will show a lower voltage reading and may trigger a low-battery warning immediately. Charge fully via the OEM charger before first use to bring the cell to its rated operating window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the charge IC inside the host device or charger may apply a reduced current to condition new cells — this is standard CC\/CV behaviour on Li-Polymer packs. The result is a longer charge time and sometimes an early termination that leaves the cell at 90–95% rather than 100%. This clears after one complete cycle as the charge IC updates its internal current and voltage targets. If the issue persists beyond cycle two, verify the charger output is within the cell's rated charge voltage of 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333500895322,"sku":"BWCS-OEM127-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333500928090,"sku":"BWCS-OEM127-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333500960858,"sku":"BWCS-OEM127-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OEM127-1.webp?v=1778212820"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-SRF860SL-1.webp?v=1780885009","url":"https:\/\/batteryweb.com\/collections\/battery-pack.oembed?page=2","provider":"BatteryWeb","version":"1.0","type":"link"}