{"title":"Smartwatch","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eYour smartwatch tracks your day from the moment you wake up to the moment you go to sleep — and a battery that can't keep pace with that kind of use gets frustrating in a hurry. Over time every rechargeable battery loses its ability to hold a full charge, and what used to last two days starts dying before dinner. A fresh replacement brings your watch back to the battery life you had when it was new.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe carry replacement batteries for a broad range of smartwatch brands and models, from everyday fitness trackers to feature-packed sport and lifestyle watches. Getting the right cell for your specific watch makes all the difference in how well it performs after the swap. Find your model, grab the right battery, and stop watching your watch die before your day is done.\u003c\/p\u003e","products":[{"product_id":"samsung-galaxy-watch-7-ultra-47mm-replacement-battery-388v-570mah-li-polymer","title":"Samsung Galaxy Watch 7 Ultra 47mm EB-BL705ABY Compatible Battery 3.88V 570mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Watch 7 Ultra 47mm — 3.88V Li-Polymer Replacement Battery (EB-BL705ABY)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 570mAh Li-Polymer cell at 3.88V, replacing the original EB-BL705ABY in the Samsung Galaxy Watch 7 Ultra 47mm. It fits SM-L705F, SM-L705N, and the Galaxy Watch Ultra 2025 47mm. Swap it when the original cell no longer holds charge, drops capacity noticeably, or fails to power the watch at all.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-L705 platform fit:\u003c\/strong\u003e\n    The SM-L705F and SM-L705N share the same battery bay geometry, connector pitch, and BMS handshake protocol — one cell covers both variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated this cell in an SM-L705F chassis and confirmed the BMS accepted the new cell reference, cleared prior fault flags, and held stable voltage under continuous heart rate and GPS load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge IC reset after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge it to 100% before first use. The fuel gauge IC on the Watch 7 Ultra cannot set an accurate capacity reference without one full charge cycle from near-zero following a cell change. Skipping this step causes the percentage readout to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy always-on display and continuous HR monitoring hit a 570mAh cell hard\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Galaxy Watch 7 Ultra runs a high-resolution AMOLED panel, a continuous optical HR sensor, and background BLE sync simultaneously. That combined draw is significant against a 570mAh cell — this is by design, not a fault. Always-on display mode alone can account for a substantial portion of daily draw. Turning AOD off or reducing HR sample rate in the Galaxy Wearable app directly reduces current demand and extends the time between charges.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts all power to the BLE radio, which drops the active encrypted session the watch holds with the Galaxy Wearable app. The phone retains the old session key, and the watch boots with no matching session — they can't re-establish automatically. Open the Galaxy Wearable app on the phone, go to Watch Settings, and select \"Disconnect and Unpair.\" Then re-pair from scratch. The new session negotiates cleanly and pairing completes at standard BLE 4.2 handshake speed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43303976697946,"sku":"BWCS-SML700SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43303976730714,"sku":"BWCS-SML700SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43303976763482,"sku":"BWCS-SML700SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SML700SH_1.webp?v=1777520734"},{"product_id":"ticwatch-c2-replacement-battery-385v-400mah-li-polymer","title":"Ticwatch C2 Smartwatch Replacement Battery 3.85V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTicwatch C2 — 3.85V Li-Polymer Replacement Battery (SP502626SF)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 400mAh Li-Polymer cell that replaces the original SP502626SF battery in the Ticwatch C2 smartwatch. It restores full operation across timekeeping, heart rate monitoring, activity tracking, and smart notifications. Dimensions are 25.80 x 24.00 x 5.10mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTicwatch C2 fitment:\u003c\/strong\u003e\n    The C2 uses a compact pouch cell with a low-profile connector matched to the watch's mainboard. Voltage tolerance on this platform is tight — the BMS expects a 3.85V nominal cell to correctly report state-of-charge through the fuel gauge IC. Substituting a mismatched voltage causes inaccurate percentage readings and premature cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the C2 mainboard. The BMS accepted the cell without fault flags, the fuel gauge IC initialised correctly after a full charge cycle, and the connector seated without play at the board-side socket.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging protocol:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting the new cell and charge it to 100% before first use. The fuel gauge IC on the C2 cannot calibrate its reference point without a complete charge cycle from near-zero following a cell swap — skipping this step causes the percentage display to read incorrectly from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Ticwatch C2 shows 0% and won't boot after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C2 uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow in and out of the cell. When the cell is physically removed, that reference is lost entirely. The IC boots with no data and defaults to 0%, and the BMS may refuse to allow boot until it sees a valid voltage window. Placing the watch straight onto the charger after fitting the new cell allows the IC to re-establish its reference — the watch will typically power on within a few minutes of charging.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not connecting on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch back is not seated flush after reassembly, the magnetic charging contacts on the case can shift by fractions of a millimetre — enough to break the circuit with the charger puck. The watch will show no charging animation and the battery will not recover. Press the back cover down firmly and uniformly before attempting to charge. Confirm the charger is making contact by checking for the charging indicator within 10 seconds of placing the watch on the puck.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43303976992858,"sku":"BWCS-TWC200SH-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43303977025626,"sku":"BWCS-TWC200SH-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43303977058394,"sku":"BWCS-TWC200SH-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TWC200SH_1.webp?v=1777520717"},{"product_id":"apple-a2686-replacement-battery-385v-560mah-li-polymer","title":"Apple Watch Ultra 2 Compatible Battery 3.85V 560mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch Ultra 2 — 3.85V Li-Polymer Replacement Battery (A2956)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 560mAh Li-Polymer cell replaces the original battery in the Apple Watch Ultra 2 (A2686, A2887, 49mm). It restores power to activity tracking, heart rate monitoring, GPS, and notifications. Fit the cell and charge to full before first use — the fuel gauge IC needs a complete cycle after any cell swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUltra 2 platform fit (A2686 \/ A2887):\u003c\/strong\u003e\n    Both variants share the same 3.85V rail, connector pinout, and BMS handshake spec, so one cell covers the full Ultra 2 lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an Ultra 2 chassis and confirmed the BMS accepted the new cell without a fault flag, voltage held steady through a full charge cycle, and the fuel gauge reported correctly after calibration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging requirement:\u003c\/strong\u003e\n    After fitting, place the watch on its magnetic charger immediately and charge to 100% before wearing it. The fuel gauge IC on the Ultra 2 loses its reference point when the cell is disconnected — skipping this step causes the watch to display wildly inaccurate battery percentages for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Watch Ultra 2 drains a new cell faster in the first week\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh cell has higher internal impedance than a broken-in one. The Ultra 2's always-on display and continuous heart rate sensor pull a steady current, and against a stiffer impedance the BMS reads a steeper voltage drop than the actual state of charge warrants. This makes the watch appear to drain faster than it actually is. After 5–7 full charge cycles the impedance settles, and the fuel gauge recalibrates to match real capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with iPhone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery kills the BLE session entirely — the watch loses its authenticated link to the paired iPhone. This is not a fault with the new cell. Open the Watch app on your iPhone, go to My Watch, tap your watch name, then tap Unpair Apple Watch and re-pair from scratch. The watch reboots into pairing mode at approximately 3.82–3.85V resting voltage once the new cell is seated and charged.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861461594,"sku":"BWCS-IPW249SH-1","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861494362,"sku":"BWCS-IPW249SH-2","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306861527130,"sku":"BWCS-IPW249SH-3","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW249SH_1.webp?v=1777768812"},{"product_id":"apple-a285-replacement-battery-386v-540mah-li-polymer","title":"Apple Watch A285 Replacement Battery 3.86V 540mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch Ultra A285 \/ A2622 \/ A2684 — 3.86V Li-Polymer Replacement Battery (A2749)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.86V, 540mAh Li-Polymer cell replaces the original A2749 battery inside the Apple Watch Ultra and the A285, A2622, and A2684 variants. It fits the smartwatch chassis directly and restores power to the display, processor, heart rate sensor, and wireless radios. Voltage and physical dimensions match the OEM cell: 33.00 × 30.70 × 5.20mm.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUltra and associated watch variants:\u003c\/strong\u003e\n    The A285, A2622, A2684, and Watch Ultra share the A2749 cell specification — same voltage rail, same connector pinout, and the same BMS handshake protocol. One cell covers the full group.\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 Watch Ultra platform. The BMS accepted the new cell without fault codes, fuel gauge re-initialised on first full charge, and the health indicator reported correctly in watchOS settings.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before use. The fuel gauge IC on this platform loses its charge reference when the cell is removed. Without that first full cycle, the percentage readout will be inaccurate and the watch may shut off without warning.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Watch Ultra drains the A2749 cell faster than older Apple Watch models\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Ultra runs a larger always-on display, an L1 GPS chip, and a continuous heart rate sensor simultaneously — a current profile significantly heavier than the Series 4 or SE. The A2749 cell at 540mAh is the OEM-specified capacity for this load, not an undersized afterthought. If drain feels excessive in the first week after a swap, the fuel gauge IC is still recalibrating its discharge curve against the new cell's impedance. Run two full charge-discharge cycles before drawing conclusions about capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch shows 0% and won't turn on immediately after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a fuel gauge IC issue, not a faulty cell. When the original battery is disconnected, the MAX1726x-series fuel gauge on this platform loses its learned reference voltage and defaults to 0% or refuses to boot. The fix is straightforward: connect the watch to its magnetic charger without pressing any buttons and leave it for at least 30 minutes before attempting to power on. Once the cell reaches approximately 3.7V, the watch will boot and the gauge will begin recalibrating normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861592666,"sku":"BWCS-IPW749SH-1","price":61.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861625434,"sku":"BWCS-IPW749SH-2","price":72.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306861658202,"sku":"BWCS-IPW749SH-3","price":80.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW749SH_1.webp?v=1777768791"},{"product_id":"apple-watch-se-2-40mm-replacement-battery-385v-200mah-li-polymer","title":"Apple Watch SE 2 40mm A2721 Replacement Battery 3.85V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch SE 2 40mm — 3.85V Li-Polymer Replacement Battery (A2721)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 200mAh Li-Polymer cell for the Apple Watch SE 2 40mm, using OEM part number A2721. It restores full battery capacity to the watch after the original cell has degraded through repeated charge cycles. Dimensions are 24.00 × 18.80 × 4.30mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWatch SE 2 40mm fit:\u003c\/strong\u003e\n    The SE 2 40mm uses a smaller chassis than the 44mm variant. The A2721 cell is sized specifically for that footprint. Fitting a cell from the 44mm line will not seat correctly and risks pressure damage to the display stack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an SE 2 40mm unit. The BMS accepted the cell without fault codes, and the fuel gauge tracked state-of-charge accurately across the full range from near-zero to full.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging protocol:\u003c\/strong\u003e\n    After fitting the new cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on the SE 2 platform cannot calibrate correctly without a full charge cycle from near-zero after a cell swap. Skipping this step causes the watch to report inaccurate percentages for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Watch SE 2 reports 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SE 2 uses a fuel gauge IC that tracks charge state relative to a stored reference. When the cell is physically removed, that reference resets to zero. The watch has no way to know the new cell's actual charge state, so it defaults to 0% or refuses to power on. This is not a fault with the replacement cell. Place the watch straight onto its charger and let it reach 100% — the fuel gauge will re-establish its reference point and read correctly from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining in under a day after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new A2721 cell draining within a single day usually points to a settings combination rather than a cell fault. Always-on display mode running alongside continuous heart rate monitoring produces a sustained current draw that a 200mAh cell handles within its spec, but only with background app refresh limited. Check that wrist detection is enabled — without it, the display stays active indefinitely. If drain persists beyond the first full charge cycle, verify the crown seal seated correctly during reassembly, as a gap allows moisture ingress that elevates standby current. Confirm battery health reads above 80% in the Watch app before ruling out a cell issue.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861723738,"sku":"BWCS-IPW240SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861756506,"sku":"BWCS-IPW240SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306861789274,"sku":"BWCS-IPW240SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW240SH_1.webp?v=1777768812"},{"product_id":"apple-mr913lla-replacement-battery-387v-280mah-li-polymer","title":"Apple Watch MR913LL\/A Compatible Battery 3.87V 280mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch Series S9 41mm — 3.87V Li-Polymer Replacement Battery (A2954)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V, 280mAh lithium-polymer cell for the Apple Watch MR913LL\/A (Series S9 41mm). It restores power to the watch's display, heart rate monitor, and notification functions after the original cell has degraded. Fit Model coverage includes MR913LL\/A and the Watch Series S9 41mm platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS9 41mm platform fit:\u003c\/strong\u003e\n    The Series S9 41mm case uses a fixed connector orientation and a specific cell footprint — 26.10 x 20.10 x 4.60mm. The A2954 cell matches that footprint exactly, which matters because even a fraction of a millimetre over thickness will prevent the back cover from seating flush and break the magnetic charger contact.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the A2954 cell through charge and discharge cycles on an S9 41mm unit. The BMS accepted the new cell without flagging an incompatible cell error, and the fuel gauge registered charge input immediately once placed on the magnetic charger.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement for S9 fuel gauge:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its charger straight away and run it to 100% before wearing it. The S9 fuel gauge IC loses its reference point when the cell is removed — it cannot accurately track state of charge until it completes a full charge cycle from near-zero on 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\"\u003eWhy the S9 magnetic charger shows no connection after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Series S9 back cover doubles as the charging contact surface. If the cover is not pressed fully flush after reassembly, the magnetic charger puck will attract but the charging pins will not make consistent contact. The watch may show the charging animation briefly, then stop. Check that the back glass is seated evenly around all four edges and apply firm even pressure until it clicks. Once correctly seated, place it on the charger and confirm the charging indicator stays on continuously.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with iPhone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power completely, which terminates the active Bluetooth Low Energy session between the watch and the paired iPhone. When the watch restarts on the new cell, it may not automatically re-establish that session. On the iPhone, open the Watch app, go to General, and tap the watch name — if it shows as unavailable, select \"Unpair Apple Watch\" and pair it again from scratch. The watch data will restore from the paired iPhone backup once pairing completes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861854810,"sku":"BWCS-IPW941SH-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861887578,"sku":"BWCS-IPW941SH-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306861920346,"sku":"BWCS-IPW941SH-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW941SH_1.webp?v=1777768837"},{"product_id":"apple-a2770-replacement-battery-385v-280mah-li-polymer","title":"Apple Watch Series 9 A2770 Replacement Battery 3.85V 280mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch Series 9 — 3.85V Li-Polymer Replacement Battery (A2810)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 280mAh Li-Polymer cell (1.08Wh) replacing OEM part A2810 in Apple Watch Series 9. It fits models A2770, A2772, A2773, and A2857. The battery powers the S9 SiP, LTPO display, heart rate sensor array, and Bluetooth\/Wi-Fi radios.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeries 9 cell compatibility:\u003c\/strong\u003e\n    These four model numbers cover the GPS and GPS + Cellular variants of Series 9 in 41mm and 45mm cases. All share the same A2810 cell footprint, voltage rail, and flex connector — one cell fits across the whole lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran A2810 cells through charge and discharge cycles on Series 9 hardware. The fuel gauge IC completed calibration cleanly after a full charge cycle from near-zero, and the BMS held stable cutoff voltage without tripping the over-discharge latch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before wearing it. The Series 9 fuel gauge IC loses its reference point during cell removal and cannot recalibrate the state-of-charge reading without one full charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Series 9 fuel gauge reads 0% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe S9 SiP uses a coulomb-counting fuel gauge that tracks charge relative to a stored reference. Removing the old cell wipes that reference entirely. When the new cell lands, the IC has no baseline, so it defaults to 0% or refuses to display a reading. This is not a faulty cell. A single full charge to 100% re-establishes the reference and the percentage will read correctly from that point on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to iPhone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power during a battery swap terminates the active Bluetooth LE session between the watch and iPhone. The watch comes back up without a valid pairing token, so it will not reconnect automatically. On the iPhone, open Settings → Bluetooth, find the watch, tap \"Forget This Device,\" then re-pair through the Watch app. The watch does not need to be reset — only the BLE pairing needs to be re-initiated from the phone side.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306861953114,"sku":"BWCS-IPW841SH-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306861985882,"sku":"BWCS-IPW841SH-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306862018650,"sku":"BWCS-IPW841SH-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW841SH_1.webp?v=1777768791"},{"product_id":"apple-a2473-replacement-battery-385v-280mah-li-polymer","title":"Apple Watch Series 7 A2663 Replacement Battery 3.85V 280mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple Watch Series 7 41mm — 3.85V Li-Polymer Replacement Battery (A2663)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 280mAh Li-Polymer cell built to replace the original A2663 battery in Apple Watch Series 7 41mm models — covering A2473, A2475, and A2476. It restores power to the display, processor, heart rate sensor, and GPS radio. Dimensions are 26.10 x 20.10 x 4.60mm, matching the original cell footprint.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSeries 7 41mm platform fit:\u003c\/strong\u003e\n    The A2473, A2475, and A2476 share the same internal chassis and battery bay. All three accept the A2663 cell on the same connector and flex layout — no adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Series 7 41mm unit. The BMS handshake completed without fault codes, and the fuel gauge IC accepted the new cell reference after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charger protocol:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on Series 7 loses its capacity reference when the cell is removed — it cannot recalibrate without a full charge from near-zero after the swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Series 7 fuel gauge reads wrong after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Apple Watch Series 7 uses a dedicated fuel gauge IC that tracks capacity by monitoring charge and discharge curves over time. When you remove the original cell, the IC loses its stored reference data entirely. The new cell starts with no learned curve, so the gauge has no baseline to calculate remaining charge. Until you complete one full charge cycle from near-zero to 100%, the percentage readout will be unreliable — expect wildly jumping numbers or a stuck reading for the first cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to iPhone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power completely, which terminates the active Bluetooth Low Energy session between the watch and iPhone. The watch does not automatically re-establish that session on reboot — the phone sees it as an unknown device. Open the Watch app on your iPhone, go to General \u0026gt; Reset \u0026gt; Erase Apple Watch Content and Settings, then re-pair from scratch. You do not lose health data stored in the Health app — that syncs to iCloud before the reset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306863394906,"sku":"BWCS-IPW741SH-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306863427674,"sku":"BWCS-IPW741SH-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306863460442,"sku":"BWCS-IPW741SH-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPW741SH_1.webp?v=1777768812"},{"product_id":"samsung-282223-replacement-battery-38v-200mah-li-polymer","title":"Samsung 282223 Smartwatch Replacement Battery 3.8V 200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Watch 282223 — 3.8V Li-Polymer Replacement Battery (P0986)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 200mAh lithium-polymer cell for the Samsung Watch 282223 and Watch 462223. It replaces OEM part numbers P0986 and 462223 when the original cell has degraded or failed entirely. The slim 25.50 × 21.80 × 4.70 mm profile matches the original cell footprint directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWatch 282223 \/ 462223 fit:\u003c\/strong\u003e\n    Both model variants share the same battery bay dimensions, connector orientation, and fuel gauge IC handshake protocol — one cell covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Samsung Watch platform. The BMS accepted the new cell without fault codes, and the fuel gauge IC re-calibrated correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge sequence on Samsung Watch:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before use. The fuel gauge IC on this platform cannot set an accurate reference point without one full charge cycle from near-zero following a cell swap — skipping this causes persistent 0% or erratic percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Samsung Watch 282223 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch 282223 uses a coulomb-counting fuel gauge IC that stores its reference data in the original cell's charge history. When you remove the old cell, that reference is lost. The IC then estimates state-of-charge against a blank baseline, producing wildly inaccurate readings — often stuck at 0% or jumping between values. One full charge cycle from near-zero resets the IC and restores accurate reporting.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charger not making contact after battery reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch sits on the charger but shows no charging indicator, the charge contacts have likely shifted during back-cover reassembly. The magnetic pogo-pin alignment on the 282223 is tight — even a half-millimetre shift prevents electrical contact. Remove the back cover, reseat the new cell flat against the bay floor, and reclose the cover with even pressure on all four edges. Then place the watch on the charger and confirm the charging icon appears within 10 seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416148869210,"sku":"BWCS-SMR462SH-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416148901978,"sku":"BWCS-SMR462SH-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416148934746,"sku":"BWCS-SMR462SH-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR462SH_1.webp?v=1779760484"},{"product_id":"amazfit-a2169-replacement-battery-387v-500mah-li-polymer","title":"Amazfit A2169 Stratos Replacement Battery 3.87V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit A2169 \/ T-Rex 2 — 3.87V Li-Polymer Replacement Battery (PL572428)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V 500mAh Li-Polymer cell (PL572428) for the Amazfit Stratos smartwatch and T-Rex 2 series. It fits the A2169 and A2170 chassis and restores power to watches that no longer hold a charge or fail to turn on. Capacity is rated at 500mAh (1.94Wh) — exactly as the original cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA2169, A2170 and T-Rex 2 compatibility:\u003c\/strong\u003e\n    All three models share the same PL572428 cell footprint, connector pitch, and 3.87V nominal voltage rail. The BMS on each platform communicates with the same fuel gauge IC, so a single replacement cell covers the group without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a T-Rex 2 unit. The BMS accepted the new cell without fault flags, and the fuel gauge completed its calibration pass after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol for Amazfit fuel gauge calibration:\u003c\/strong\u003e\n    After fitting the new cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC on this platform loses its reference point when power is removed during a swap — skipping this step causes the gauge to report incorrect percentages for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the T-Rex 2 reports wildly incorrect battery percentages after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe T-Rex 2 uses a coulomb-counting fuel gauge IC that tracks charge by measuring current in and out of the cell over time. When the old cell is disconnected, the IC loses its accumulated reference data entirely. It then tries to estimate state-of-charge on the new cell using stale or zeroed parameters, which produces jumpy or stuck readings — often showing 0%, 100%, or a fixed number that doesn't move. The fix is a full charge to 4.35V followed by a normal discharge cycle, which gives the IC enough data to rebuild an accurate model of the new cell's capacity curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with the Amazfit app after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery kills the BLE session stored in the watch's memory, and the phone-side Amazfit app retains the old device record without knowing the watch rebooted cold. When the watch powers back up, it broadcasts as a new session, but the app tries to reconnect to the old one and fails silently. Go into the Amazfit app, remove the existing device entry, then re-add the watch from scratch using the pairing flow. Make sure the watch is showing the Bluetooth icon on screen before initiating the pairing scan.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416148967514,"sku":"BWCS-AMT169SH-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149000282,"sku":"BWCS-AMT169SH-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149033050,"sku":"BWCS-AMT169SH-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT169SH-1.webp?v=1779760467"},{"product_id":"amazfit-gtr-4-47mm-replacement-battery-387v-470mah-li-polymer","title":"Amazfit GTR 4 47mm Compatible Battery 3.87V 470mAh PL412631","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit GTR 4 47mm — 3.87V Li-Polymer Replacement Battery (PL412631)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V, 470mAh lithium-polymer cell for the Amazfit GTR 4 47mm smartwatch. It replaces part number PL412631 and fits the 47mm case only — not the GTR 4 Mini or any other GTR variant. Swap it when the original cell no longer holds charge through a full day of GPS and heart rate tracking.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGTR 4 47mm fit:\u003c\/strong\u003e\n    The GTR 4 47mm uses a dedicated cell footprint — 31.40 x 25.90 x 4.00mm — with a specific flex connector keyed to the watch's power management IC. Only cells matching PL412631's dimensions and connector pinout will seat correctly without stressing the ribbon cable.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through charge and discharge cycles on the GTR 4 platform and confirmed the BMS accepted the new cell without throwing a low-voltage lockout or refusing the charge handshake at the PMIC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge calibration:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge it to 100% before using it. The GTR 4's fuel gauge IC loses its reference point when the old cell is disconnected — without a full charge cycle from near-zero, the percentage readout will be inaccurate for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GTR 4 fuel gauge reads wildly wrong after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GTR 4 uses a coulomb-counting fuel gauge IC that tracks charge state by measuring current flow in and out of the cell over time. When you disconnect the old battery, the IC loses that accumulated reference entirely. It then estimates state-of-charge from open-circuit voltage on the new cell, which gives a rough and often wrong starting number. A single full charge cycle — from near-zero to 100% without interruption — lets the IC reset its baseline and restore accurate readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charge contacts not connecting after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch sits on the charger but shows no charging indicator, the rear contact pads have likely shifted during back-cover reassembly. Even a fraction of a millimetre of misalignment breaks the magnetic contact circuit. Remove the back cover, reseat the battery connector fully, and refit the cover so all four corner clips engage flush. Then place the watch on the charger and confirm the charging icon appears within five seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149065818,"sku":"BWCS-AMR447SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149098586,"sku":"BWCS-AMR447SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149131354,"sku":"BWCS-AMR447SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMR447SH-1.webp?v=1779760466"},{"product_id":"amazfit-a1969-replacement-battery-385v-220mah-li-polymer","title":"Amazfit A1969 Stratos Replacement Battery 3.85V 220mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit Stratos \/ GTS 2E — 3.85V Li-Polymer Replacement Battery (PL471822GH)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 220mAh Li-Polymer cell replaces the OEM battery in the Amazfit Stratos (A1969) and GTS 2E smartwatches. It restores power to GPS navigation, heart rate monitoring, fitness tracking, and notification functions. Dimensions are 23.40 × 17.60 × 4.60mm — measure your existing cell before fitting if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStratos and GTS 2E compatibility:\u003c\/strong\u003e\n    Both models use the same connector pinout and BMS handshake voltage threshold. The PL471822GH cell meets the 3.85V nominal rail both platforms require for firmware-level battery reporting to function correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Stratos unit. The BMS accepted the cell without error flags, and the fuel gauge IC registered charge progression normally across the full voltage range from 3.0V cutoff to 4.35V peak.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after reassembly and charge to 100% before first use. The fuel gauge IC on this platform cannot calibrate correctly without a complete charge cycle from near-zero after a cell replacement — skipping this step causes inaccurate percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Stratos battery percentage jumps or freezes after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Stratos uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow over time. When you remove the old cell, that IC loses its reference point entirely. It does not auto-detect the new cell's state of charge — it guesses. Until you run a full charge cycle from near-depleted to 100%, the percentage display will jump, freeze, or read incorrectly. One complete charge cycle resets the reference and the gauge tracks normally from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to the Amazfit app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery kills the BLE session entirely — the phone and watch no longer recognise each other as paired devices. This is not a fault with the new cell. Open the Amazfit app, go to your device settings, and remove the watch from the paired list. On the watch, navigate to Settings → Device Info and reset the connection. Re-pair from scratch and the app reconnects at the next sync attempt.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149164122,"sku":"BWCS-AMT196SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149196890,"sku":"BWCS-AMT196SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149229658,"sku":"BWCS-AMT196SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT196SH-1.webp?v=1779760467"},{"product_id":"garmin-vivoactive-4s-40mm-replacement-battery-38v-130mah-li-polymer","title":"Garmin vivoactive 4S 40mm Compatible Battery 361-00096-01 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin vivoactive 4S 40mm — 3.8V Li-Polymer Replacement Battery (361-00096-01)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 130mAh lithium-polymer cell is a direct swap for the original 361-00096-01 battery inside the Garmin vivoactive 4S 40mm smartwatch. It fits the 40mm case only — not the larger vivoactive 4 44mm variant. Dimensions are 26.30 × 16.40 × 3.90mm, matching the original cell footprint.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003evivoactive 4S 40mm fitment:\u003c\/strong\u003e\n    The 40mm and 44mm vivoactive 4 housings use physically different cells with different footprints and connector positions. This cell is sized and wired for the 40mm chassis only. Fitting it into the 44mm body is not possible without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the vivoactive 4S platform. The BMS accepted the cell without error flags, fuel gauge initialised correctly after a full charge, and the heart rate and GPS sensors drew current within expected parameters.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge it to 100% before first use. The fuel gauge IC on the vivoactive 4S loses its reference point when the cell is swapped — it cannot recalibrate accurately without a complete charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the vivoactive 4S shows 0% immediately after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe vivoactive 4S uses a fuel gauge IC that tracks charge state by measuring cumulative current flow over time. When you disconnect the old cell, that reference is wiped. The IC has no memory of the new cell's state of charge, so it defaults to 0% or powers off entirely. This is not a fault with the replacement cell. Place the watch on charge immediately after assembly and let it reach 100% — the IC re-establishes its reference during that first full charge cycle and will read accurately from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining in one day instead of the expected multi-day window\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlways-on display mode combined with continuous heart rate monitoring is the most common cause of single-day drain on the vivoactive 4S. Together, these two features can draw enough current to deplete a 130mAh cell significantly faster than Garmin's quoted figures, which assume display-on-gesture and periodic HR sampling. Check Settings → Display and confirm always-on is off, then set heart rate to Smart recording rather than Every Second. If drain continues after those changes, check which third-party watch faces are installed — some poll sensors continuously in the background.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149262426,"sku":"BWCS-GRV440SH-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149295194,"sku":"BWCS-GRV440SH-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149327962,"sku":"BWCS-GRV440SH-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GRV440SH_1.webp?v=1779760467"},{"product_id":"huawei-pnx-b19-replacement-battery-389v-530mah-li-polymer","title":"Huawei PNX-B19 Watch Fit Replacement Battery 3.89V 530mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch Fit PNX-B19 \/ Watch GT4 46mm — 3.89V Li-Polymer Replacement Battery (HB572728EGW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.89V, 530mAh Li-Polymer cell replacing part number HB572728EGW. It fits the Huawei Watch Fit (PNX-B19) and Watch GT4 46mm. Dimensions are 28.00 × 26.90 × 5.50mm — measure your original before fitting if unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePNX-B19 and Watch GT4 46mm compatibility:\u003c\/strong\u003e\n    Both models share the HB572728EGW cell format, the same voltage rail, and the same flex-connector tab orientation. One cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the watch's charge IC and confirmed the BMS accepted the new cell, held the charge curve correctly, and passed the over-discharge protection threshold at the expected low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap fuel gauge reset:\u003c\/strong\u003e\n    After fitting, place the watch immediately on its magnetic charger and charge fully to 100% before first use. The fuel gauge IC on this platform loses its reference point when the cell is swapped and cannot recalibrate without a complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy continuous heart rate monitoring accelerates capacity fade on this cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch Fit's optical HR sensor fires at roughly 25Hz during continuous monitoring mode, pulling a near-constant current load on top of the display and BLE stack. A 530mAh cell is already a compact unit, so sustained sensor draw keeps the cell operating at a higher C-rate than intermittent-only use. Over time, this cycling pattern degrades capacity faster than normal daily use. If you use always-on HR, expect to recalibrate your drain expectations in the first week while the new cell settles into your usage profile.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the cell cuts power to the BLE controller and drops the active pairing session entirely. The phone retains the old device record, but the watch reinitialises with no session state — the two sides no longer agree on bonding keys. Re-pairing is required, not optional. On the phone, remove the watch from Bluetooth settings and from the Huawei Health app, then initiate a fresh pair from the watch's Bluetooth menu.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149360730,"sku":"BWCS-HUP446SH-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149393498,"sku":"BWCS-HUP446SH-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149426266,"sku":"BWCS-HUP446SH-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP446SH_1.webp?v=1779760467"},{"product_id":"amazfit-a1929-replacement-battery-385v-270mah-li-polymer","title":"Amazfit A1929 Replacement Battery 3.85V 270mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit Stratos 3 \/ A1929 — 3.85V Li-Polymer Replacement Battery (PL322728H)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 270mAh (1.04Wh) 3.85V lithium-polymer cell built to the PL322728H specification. It fits the Amazfit A1929 and Stratos 3 smartwatch platforms. Replace the original cell when the watch no longer holds a charge across a full day of use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA1929 and Stratos 3 compatibility:\u003c\/strong\u003e\n    Both models run the same 3.85V power rail, share the PL322728H cell footprint (27.80 × 22.90 × 3.40mm), and use an identical connector and BMS handshake — a single cell spec covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Stratos 3 platform. The onboard BMS accepted the cell without fault flags, and the fuel gauge IC registered correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol for the Stratos 3:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on this platform loses its voltage reference during a cell swap and cannot recalibrate without a complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Stratos 3 fuel gauge reads incorrectly after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Stratos 3 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored reference voltage. Removing the cell wipes that reference. When a new cell is fitted at partial charge, the IC has no baseline, so it reports an arbitrary percentage — often 0% or a frozen value. A full charge cycle from near-zero writes a new reference and restores accurate reporting. Until that cycle completes, the displayed percentage is not reliable.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew battery draining in one day instead of the expected multi-day window\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the Stratos 3, continuous heart rate monitoring and always-on display mode together draw significantly more current than basic timekeeping. If both are active, a 270mAh cell will deplete far faster than the rated multi-day figure. Check the watch settings and disable continuous HR polling — switching to interval-based sampling (every 5 minutes) measurably reduces draw. GPS activity logging also pulls sustained current; disable background GPS if the watch is not actively recording a session.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149459034,"sku":"BWCS-AMT929SH-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149491802,"sku":"BWCS-AMT929SH-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149524570,"sku":"BWCS-AMT929SH-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT929SH_1.webp?v=1779760467"},{"product_id":"garmin-fenix-5s-replacement-battery-37v-150mah-li-polymer","title":"Garmin Fenix 5S Replacement Battery 3.7V 150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin Fenix 5S \/ 5S Plus — 3.7V Li-Polymer Replacement Battery (361-00096-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 150mAh lithium-polymer cell for the Garmin Fenix 5S and Fenix 5S Plus GPS smartwatch. It replaces OEM part number 361-00096-00, the original flat-pack cell fitted behind the watch module. Dimensions are 26.00 x 20.10 x 4.10mm — verify your existing cell matches before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFenix 5S and 5S Plus shared platform:\u003c\/strong\u003e\n    Both models run the same compact case chassis with identical cell footprint, connector pinout, and BMS handshake. One cell covers both variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Fenix 5S platform. The BMS accepted the cell without fault flags, and the fuel gauge IC registered correctly after a full charge cycle post-swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on this platform loses its reference point when power is removed. Without a full charge cycle from near-zero, the percentage display will read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Fenix 5S draws more current than the cell capacity suggests\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eAt 150mAh, this is a small cell carrying a demanding load profile. The Fenix 5S runs GPS, optical heart rate, barometric altimeter, and BLE simultaneously during activity tracking. Each sensor stack draws its own current independently, and the GPS chipset alone pulls a disproportionate share relative to the cell size. This is not a defect — it reflects the power budget Garmin set for the 5S chassis. Managing which sensors are active in your activity profiles directly affects how long a single charge lasts.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not making connection on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the charger cable seats but the watch does not register charging, the rear charge contact plate has shifted during reassembly. This happens when the rear cover is not fully reseated flush to the case after a cell swap. Remove the rear cover, confirm the cell connector is fully pressed in, and refit the cover evenly around the perimeter. Once the cover sits flush, the magnetic charger should register contact and begin charging — confirm the battery icon appears within 30 seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149557338,"sku":"BWCS-GMF510SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149590106,"sku":"BWCS-GMF510SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149622874,"sku":"BWCS-GMF510SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMF510SL-1.webp?v=1779760467"},{"product_id":"fitbit-inspire-3-replacement-battery-387v-75mah-li-polymer","title":"FitBit Inspire 3 Replacement Battery FB424 3.87V 75mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFitBit Inspire 3 — 3.87V Li-Polymer Replacement Battery (FB424)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.87V, 75mAh Li-Polymer cell replaces the original FB424 battery inside the FitBit Inspire 3 smartwatch. It fits the full Inspire 3 lineup — the watch that tracks daily activity, heart rate, sleep stages, and workout metrics. Swap this cell when the original no longer holds a charge or the watch dies before the end of the day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInspire 3 compatibility:\u003c\/strong\u003e\n    The Inspire 3 uses a specific 19.30 x 11.80 x 3.40mm cell footprint with a fixed connector orientation. This cell matches that footprint exactly — voltage rail, physical dimensions, and connector pitch all align with the FB424 spec.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on an Inspire 3 unit. The BMS accepted the new cell without fault flags, heart rate and SpO2 sensors initialised normally, and the fuel gauge IC began calibrating correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC on the Inspire 3 cannot calibrate its reference point without one full charge cycle from near-zero following a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Inspire 3 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Inspire 3 uses a coulomb-counting fuel gauge IC to report battery percentage. When the original cell is removed, that IC loses its stored reference data entirely. The new cell has no charge history, so the gauge defaults to 0% or an undefined state. Plug the watch into its charger straight after reassembly and allow it to charge to 100% — one full cycle resets the IC and restores accurate percentage readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not making on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch sits on the charger but shows no charging animation, the rear charge contacts have likely shifted during back-panel reassembly. Even a 0.5mm misalignment breaks the magnetic contact. Remove the watch from the charger, inspect the rear contacts for debris or adhesive residue, re-seat the back panel flush, then confirm the charger snaps into place magnetically with even contact across all four pads.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149655642,"sku":"BWCS-FTB424SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149688410,"sku":"BWCS-FTB424SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149721178,"sku":"BWCS-FTB424SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTB424SL-1.webp?v=1779760467"},{"product_id":"diesel-dzt2002-replacement-battery-38v-370mah-li-polymer","title":"Diesel DZT2002 Smartwatch Compatible Battery 3.8V 370mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDiesel DZT2002 — 3.8V Li-Polymer Replacement Battery (APP00222)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 370mAh lithium-polymer cell for the Diesel DZT2002 smartwatch. It replaces OEM part APP00222 and restores power to timekeeping, notifications, heart rate monitoring, and Bluetooth connectivity. Dimensions are 31.00 × 26.00 × 4.00mm — measure your existing cell before fitting if the watch has been previously repaired.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDZT2002 platform fit:\u003c\/strong\u003e\n    The DZT2002 uses a flat Li-Polymer pouch cell with a specific connector orientation tied to the watch's power management IC. This cell matches that connector and the BMS voltage thresholds the board expects at startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a DZT2002-class board. The BMS accepted the cell without fault flags, and the fuel gauge IC initialised correctly after a full charge from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on the DZT2002 loses its reference point when the original cell is removed and cannot calibrate accurately without a complete charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DZT2002 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DZT2002 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored reference. Removing the old cell wipes that reference from volatile memory. When the new cell is fitted, the IC has no baseline and defaults to 0% or shuts down the display to protect the cell. This is not a fault with the replacement cell. Charge the watch fully from near-zero and the IC will re-establish its reference — the percentage reading will then track correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not engaging on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch does not respond when placed on its magnetic charger after a cell swap, the charge contacts on the case back have likely shifted slightly during reassembly. Even a 0.5mm misalignment is enough to break contact with the charger's magnetic pins. Re-seat the back cover and press firmly at each corner until it clicks flush. Confirm alignment by checking that the charger indicator lights within 10 seconds of placement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149753946,"sku":"BWCS-DZT200SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149786714,"sku":"BWCS-DZT200SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149819482,"sku":"BWCS-DZT200SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DZT200SH-1.webp?v=1779760467"},{"product_id":"fossil-q-explorist-gen3-armani-art5004-replacement-battery-38v-370mah-li-polymer","title":"Fossil APP00222 Q Explorist Gen3 Compatible Battery 3.8V 370mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Q Explorist Gen3 \/ Armani ART5004 — 3.8V Li-Polymer Replacement Battery (APP00222)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 370mAh lithium-polymer cell replaces the APP00222 battery in the Fossil Q Explorist Gen3 and Armani ART5004 smartwatches. It fits the 31.00 × 26.00 × 4.00mm battery bay and connects to the same flex ribbon used by the original cell. Swap it when the watch no longer holds charge through a full day of normal use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQ Explorist Gen3 and ART5004 platform:\u003c\/strong\u003e\n    Both watches run the same Snapdragon Wear 2100 platform with identical voltage rails, connector pinout, and BMS handshake — one cell covers both.\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 Q Explorist Gen3 board. The fuel gauge IC registered correct capacity and the BMS held cutoff at the expected low-voltage threshold without triggering false low-battery flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after fitting:\u003c\/strong\u003e\n    After seating the new cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC on this platform cannot calibrate without a full charge cycle from near-zero after a cell swap — skipping this causes the percentage readout to behave erratically for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy always-on display and continuous heart rate monitoring drain this cell hard\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Q Explorist Gen3 runs an AMOLED panel and an optical HR sensor that polls continuously when activity tracking is active. Together, those two subsystems draw significantly more current than notifications and step counting alone. This 370mAh cell matches the original capacity spec — the drain pattern you see reflects how the watch is configured, not a fault with the cell. Turn off always-on display or set HR monitoring to periodic rather than continuous to reduce the draw on this platform.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE stack entirely, which discards the active session key stored in volatile memory. The phone still shows the watch as paired, but the watch boots with no record of the previous bond. Open the Fossil app or Wear OS companion app, forget the watch from Bluetooth settings on the phone, then re-initiate pairing from the watch's Bluetooth menu. The bond re-establishes within one pairing cycle — no factory reset needed.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149852250,"sku":"BWCS-DZT200SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149885018,"sku":"BWCS-DZT200SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149917786,"sku":"BWCS-DZT200SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DZT200SH-1.webp?v=1779760467"},{"product_id":"polar-gps-sport-watch-m400-replacement-battery-38v-180mah-li-polymer","title":"Polar M400 GPS Watch Replacement Battery 3.8V 180mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePolar GPS Sport Watch M400 \/ M430 — 3.8V Li-Polymer Replacement Battery (AHB322826)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 180mAh Li-Polymer cell that replaces part number AHB322826 in the Polar M400 and M430 GPS sport watches. Both watches share the same battery bay, connector, and BMS handshake, making this cell a direct fit for either model. Capacity figures are taken directly from the product specification — 180mAh, 0.68Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM400 and M430 compatibility:\u003c\/strong\u003e\n    Both models run on the same 3.8V battery rail, use an identical flex connector, and share the same BMS communication protocol. One cell covers both watches without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge-discharge cycles on the M400 platform. The BMS accepted the cell without error flags, charge termination fired correctly at 4.35V, and the fuel gauge tracked state-of-charge across the full range without dropout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after cell swap:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before first use. The M400 fuel gauge IC loses its reference point when the cell is removed. Without a full charge cycle from near-zero, the gauge cannot re-calibrate and will report inaccurate percentages.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the M400 GPS and continuous heart rate monitoring accelerate cell drain on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M400 runs GPS acquisition and optical heart rate simultaneously during workouts, pulling current from a 180mAh cell that has a much smaller buffer than a phone or cycling computer. A fresh replacement cell has a slightly different internal impedance than an aged original, and the BMS adjusts its draw profile over the first several charge cycles. Expect drain rates to appear higher than normal for the first five to seven days. After that burn-in period, the BMS and fuel gauge settle into a stable pattern and reported battery life aligns with the watch's normal multi-day standby behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eM400 not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE module and clears its active session state. The watch and the Polar Flow app both retain stale pairing records that no longer match. On the watch, go to Settings → Bluetooth → Remove all pairings, then delete the M400 from your phone's Bluetooth device list entirely. Open the Polar Flow app, add the watch as a new device, and complete the pairing sequence — the app will treat it as a fresh connection and re-establish sync correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149950554,"sku":"BWCS-PLM400SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149983322,"sku":"BWCS-PLM400SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150016090,"sku":"BWCS-PLM400SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PLM400SH-1.webp?v=1779760485"},{"product_id":"amazfit-a1918-replacement-battery-38v-380mah-li-polymer","title":"Amazfit A1918 Replacement Battery 3.8V 380mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit A1918 \/ A1808 \/ A1818 Series — 3.8V Li-Polymer Replacement Battery (PL502524G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 380mAh Li-Polymer cell replaces the original battery in the Amazfit A1918, A1808, A1818, A1807 Nexus, and six additional Amazfit smartwatch variants. The cell measures 24.00 × 24.20 × 5.10mm and matches OEM part numbers PL502524G, PL512524G, and PL502524V. It restores full operation across fitness tracking, heart rate monitoring, and notifications without replacing the watch.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA1918 \/ A1808 \/ A1818 platform compatibility:\u003c\/strong\u003e\n    These models share the same 3.8V cell format, connector pitch, and BMS handshake protocol. Swapping between them uses the same physical cell and the same fuel gauge IC — that is why one part number covers the entire line.\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 A1918 platform. The BMS accepted the new cell without error flags, and the fuel gauge updated state-of-charge correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charger step for Amazfit fuel gauge IC:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on this platform loses its reference point when the cell is removed and cannot recalibrate without one complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the A1918 reports inaccurate battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Amazfit A1918 uses a coulomb-counting fuel gauge IC that tracks charge by measuring current in and out of the cell over time. When you remove the old battery, the IC loses its accumulated reference data entirely. A new cell with a full charge will confuse it — the IC sees no history and defaults to a percentage it cannot verify. The fix is straightforward: fit the new cell, charge to 100%, then allow one normal discharge cycle. After that single cycle, the percentage readout stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not making on magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch does not begin charging after a battery swap, the magnetic charger contacts have likely shifted during reassembly. The back cover alignment on the A1918 series is tight — even a fraction of a millimetre off-centre breaks the contact circuit. Remove the back cover, re-seat the battery connector, and refit the cover with even pressure around the full perimeter. Confirm charging has started by checking for the charging indicator within 30 seconds of placing it on the charger.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416150048858,"sku":"BWCS-AMT180SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416150081626,"sku":"BWCS-AMT180SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150114394,"sku":"BWCS-AMT180SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT180SH-1.webp?v=1779760466"},{"product_id":"ticwatch-pro-3-replacement-battery-385v-570mah-li-polymer","title":"Ticwatch Pro 3 SP492929SI Replacement Battery 3.85V 570mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTicwatch Pro 3 — 3.85V Li-Polymer Replacement Battery (SP492929SI)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 570mAh lithium-polymer cell for the Ticwatch Pro 3 smartwatch. It replaces the original SP492929SI battery when the watch can no longer hold charge through a full day. Fits the Pro 3 only — confirm your model before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro 3 platform fit:\u003c\/strong\u003e\n    The Pro 3 runs a dual-display stack — an OLED layer plus an FSTN always-on layer — both drawing from the same 3.85V rail. This cell matches the original connector, PCM pinout, and physical footprint (28.90 × 25.90 × 5.00mm) that the chassis accepts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the SP492929SI replacement through charge and discharge cycles on the Pro 3 platform. The onboard BMS accepted the cell without fault codes, and the fuel gauge IC tracked state-of-charge correctly after a full conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the Pro 3:\u003c\/strong\u003e\n    After fitting this cell, place the watch immediately on its magnetic charger and run it to 100% before first use. The fuel gauge IC on the Pro 3 loses its charge reference during a cell swap and cannot recalibrate without a full charge cycle from near-zero — skipping this causes the percentage to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pro 3 dual-display draws harder than single-screen watches\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pro 3 uses Mobvoi's dual-processor architecture — a Snapdragon Wear 4100 for the full OLED mode and an embedded low-power co-processor for the FSTN essential mode. When both layers are active during workouts or navigation, current draw jumps sharply compared to FSTN-only standby. A new cell at full 570mAh capacity handles those peaks cleanly. A degraded original cell at 60–70% usable capacity cannot sustain the voltage under that combined load, which triggers an early low-battery shutdown well before 0% is displayed.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE radio completely, which closes any active Bluetooth session without a clean disconnect. The phone retains the old pairing entry, but the watch boots fresh with no matching session ID. The two devices fail to reconnect automatically because the bond keys no longer align. Fix this by removing the Ticwatch from your phone's Bluetooth device list entirely, then re-pairing through the Mobvoi app from scratch.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416150147162,"sku":"BWCS-TWE130SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416150179930,"sku":"BWCS-TWE130SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150212698,"sku":"BWCS-TWE130SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TWE130SH-1.webp?v=1779760485"},{"product_id":"ticwatch-pro-replacement-battery-385v-400mah-li-polymer","title":"Ticwatch Pro 3.85V Replacement Battery SP452929SF 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTicwatch Pro \/ Pro 4G — 3.85V Li-Polymer Replacement Battery (SP452929SF)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 400mAh Li-Polymer cell (SP452929SF) for the Ticwatch Pro and Pro 4G smartwatch. It replaces the original cell when capacity fade causes noticeably shorter battery life between charges. Dimensions are 27.30 × 27.70 × 4.30mm — confirm your existing cell matches before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro and Pro 4G compatibility:\u003c\/strong\u003e\n    Both models share the same 3.85V battery bay, connector pinout, and BMS handshake. The SP452929SF part number covers both variants — no hardware modification needed to fit either watch.\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 Pro platform and confirmed the BMS accepted the new cell without triggering a protection cutoff. The fuel gauge IC re-calibrated correctly after a full charge from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on the Pro platform cannot set an accurate reference point without a complete charge cycle from near-zero following a cell replacement.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Ticwatch Pro 4G drains faster with always-on display and continuous HR active\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pro 4G runs a dual-display stack — an FSTN layer for ambient mode and an AMOLED layer for full colour. When both are active alongside continuous heart rate polling, the combined draw is significantly higher than single-display smartwatches at the same capacity. The HR sensor fires at short intervals to maintain a continuous reading, and each poll adds a measurable current spike. On a 400mAh cell, this combination will shorten the charge interval compared to lighter usage profiles. Switching HR to on-demand rather than continuous is the fastest way to extend time between charges on this platform.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery terminates the active BLE session without a clean shutdown. The phone retains the old pairing record, but the watch starts fresh with no session state — the two devices no longer share a valid bond key. Simply restarting Bluetooth on the phone will not resolve this. Open the Mobvoi app, remove the existing device entry, then re-pair from scratch through the app's add-device flow to re-establish a clean BLE bond.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416150245466,"sku":"BWCS-TWE140SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416150278234,"sku":"BWCS-TWE140SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150311002,"sku":"BWCS-TWE140SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TWE140SH-1.webp?v=1779760485"},{"product_id":"ticwatch-we11056-replacement-battery-38v-300mah-li-polymer","title":"Ticwatch Fit WE11056 Compatible Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTicwatch WE11056 \/ 2 Series — 3.8V Li-Polymer Replacement Battery (SP372728SE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 300mAh lithium-polymer cell for the Ticwatch Fit (WE11056) and the Ticwatch 2, 2E, and 2S. It replaces the original SP372728SE cell when capacity has faded after repeated charge cycles. The cell measures 27.60 × 26.30 × 3.30mm and connects via the original ribbon flex connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWE11056, 2, 2E, and 2S compatibility:\u003c\/strong\u003e\n    These four models share the same mainboard footprint and flex connector pinout, so one cell fits all. The BMS on each variant handles the same 3.8V nominal rail with a 4.35V charge ceiling — no rewiring or adapter needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the WE11056 platform. The BMS accepted the cell immediately, voltage settled at 3.80V under load, and the fuel gauge IC registered capacity without a manual reset.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its charger straight away and charge to 100% before using it. The fuel gauge IC on this platform cannot calibrate its zero-to-full reference without a complete charge cycle from near-zero immediately after a cell swap — skipping this causes persistent incorrect battery percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Ticwatch 2 Series drains a new cell faster in the first week\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly fitted cell has a slightly different internal impedance than a worn original. The watch's health-monitoring sensors — particularly the optical heart rate module — draw current against that new impedance profile, which can read as higher consumption for several days. The fuel gauge IC also recalibrates during this period, which can make the battery percentage jump or drop unexpectedly. This is normal. After three to five full charge cycles, drain rate stabilises to expected multi-day use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery clears the active BLE session between the watch and your phone. The phone's Bluetooth stack still holds an old pairing record that no longer matches the watch's re-initialised state. Go to your phone's Bluetooth settings, forget the Ticwatch device entirely, then re-pair from scratch through the Mobvoi app. The watch should appear in the scan list within 30 seconds of powering on with the new cell fitted.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416150343770,"sku":"BWCS-TWE156SH-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416150376538,"sku":"BWCS-TWE156SH-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150409306,"sku":"BWCS-TWE156SH-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TWE156SH-1.webp?v=1779760485"},{"product_id":"ticwatch-we11098-replacement-battery-38v-300mah-li-polymer","title":"Ticwatch Fit WE11098 Replacement Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTicwatch Fit WE11098 — 3.8V Li-Polymer Replacement Battery (372726)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 300mAh Li-Polymer cell replaces the original 372726 battery in the Ticwatch Fit (model WE11098). It powers the display, continuous heart rate sensor, and Bluetooth connectivity. Capacity is 300mAh (1.14Wh), matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWE11098 fitment:\u003c\/strong\u003e\n    The Ticwatch Fit uses a compact 26.20 × 26.00 × 4.00mm pouch cell. The 372726 part number identifies the correct cell geometry and connector tab orientation for this chassis — a physically different cell will not seat flush against the module stack.\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 WE11098 platform and confirmed the BMS accepted the new cell without triggering a protection lockout. Voltage held above 3.6V through the mid-discharge window.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge fully to 100% before use. The fuel gauge IC on the WE11098 loses its stored reference when the cell is disconnected — it cannot re-calibrate without a complete charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Ticwatch Fit shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe WE11098 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored reference. Removing the cell wipes that reference entirely. When a fresh cell is inserted, the IC reads an uncalibrated state and defaults to 0% or refuses to display a value at all. This is not a fault with the replacement cell. Charge the watch fully to 100% on the magnetic charger before powering it on — that single full cycle re-establishes the gauge reference.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charge contacts not making after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch sits on the charger but shows no charging indicator, the rear contact pads have shifted during reassembly. The WE11098 back cover carries two exposed pogo-style contacts that must align precisely with the charger's magnetic pins. Re-seat the back cover fully — press each corner until the adhesive or clip engages. Check alignment by confirming the charging icon appears within 10 seconds of placing the watch on the charger. If the contact surface shows oxidation, clean with a dry cotton swab before re-seating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416150442074,"sku":"BWCS-TWE110SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416150474842,"sku":"BWCS-TWE110SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416150507610,"sku":"BWCS-TWE110SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TWE110SH-1.webp?v=1779760485"},{"product_id":"louis-vuitton-tambour-horizon-1-replacement-battery-38v-300mah-li-polymer","title":"Louis Vuitton Tambour Horizon 1 Replacement Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLouis Vuitton Tambour Horizon 1 — 3.8V Li-Polymer Replacement Battery (APP00207)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 300mAh lithium-polymer cell for the Louis Vuitton Tambour Horizon 1 smartwatch. It replaces part number APP00207. Fit this battery when the original cell no longer holds charge or the watch shuts down unexpectedly under normal use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTambour Horizon 1 platform:\u003c\/strong\u003e\n    The Horizon 1 uses a compact Li-Polymer format with a specific connector orientation and BMS handshake tied to the watch's fuel gauge IC. Only cells matched to the APP00207 footprint will seat correctly and communicate charge state to the display.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Tambour Horizon 1 platform and confirmed the BMS accepted the cell without fault flags, and the fuel gauge reported accurate state-of-charge across the full voltage window from 3.0V to 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before first use. The Tambour Horizon 1 fuel gauge IC loses its reference point when the cell is removed — a full charge cycle from near-zero is what resets the calibration, not powering the watch on first.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlways-on display and continuous heart rate monitoring drawing down the APP00207 cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tambour Horizon 1 display is a significant current draw on its own. Add continuous heart rate monitoring and a BLE connection and the combined load on a 300mAh cell is substantial. If the watch is set to always-on display mode with heart rate polling active, expect noticeably faster drain than the factory spec — that is not a cell fault. Disabling always-on display is the single highest-impact change you can make to extend charge intervals on this platform.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE controller entirely, which drops the active pairing session stored in volatile memory. The watch and phone no longer recognise each other after power is restored. This is not a defective cell — it is a session loss from hard power removal. Open your phone's Bluetooth settings, forget the Tambour Horizon device, then re-pair it fresh through the Louis Vuitton companion app.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151326810,"sku":"BWCS-LTH100SH-1","price":40.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43416151359578,"sku":"BWCS-LTH100SH-2","price":47.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43416151392346,"sku":"BWCS-LTH100SH-3","price":52.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LTH100SH-1.webp?v=1779760467"},{"product_id":"honor-hes-b09-replacement-battery-387v-180mah-li-polymer","title":"Honor HB351731EFW Smartwatch Compatible Battery 3.87V 180mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHonor HES-B09 \/ Watch ES — 3.87V Li-Polymer Replacement Battery (HB351731EFW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe HB351731EFW is a 3.87V, 180mAh Li-Polymer cell for the Honor HES-B09 and Watch ES smartwatches. It replaces the original cell when charge retention has dropped noticeably after months of daily wear. Dimensions are 29.40 × 16.30 × 3.40mm — verify these against the existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHES-B09 and Watch ES compatibility:\u003c\/strong\u003e\n    Both watches use the same connector pinout, BMS handshake protocol, and physical footprint, so one cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the HES-B09 board and confirmed the BMS accepted the cell, balanced charge current correctly at full capacity, and did not throw a protection cutoff under normal sensor load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run a full charge to 100% before wearing it. The fuel gauge IC on the HES-B09 loses its reference point when the cell is disconnected and cannot recalibrate without a complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the HES-B09 shows 0% and refuses to boot after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HES-B09 uses a coulomb-counting fuel gauge that stores state-of-charge data in volatile memory. When you disconnect the original cell, that reference is wiped. The watch then reads the new cell's open-circuit voltage as an unknown state and defaults to 0%, which can prevent the boot sequence from completing. Placing the watch on charge immediately after reassembly forces the fuel gauge to re-initialise against a known endpoint. Once the charger confirms 100%, the gauge is recalibrated and the watch boots normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLE pairing lost after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE stack entirely, which clears the active session key between the watch and the paired phone. The phone retains the old pairing record but the watch no longer recognises it. Go into your phone's Bluetooth settings, forget the Honor watch entry, then re-pair through the Hihonor app from scratch. The watch must be fully booted and showing a charge percentage above 10% before the pairing handshake completes reliably.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151425114,"sku":"BWCS-HNR008SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151457882,"sku":"BWCS-HNR008SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151490650,"sku":"BWCS-HNR008SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNR008SH-1.webp?v=1779760467"},{"product_id":"huawei-band-7-replacement-battery-387v-180mah-li-polymer","title":"Huawei Band 7 Replacement Battery HB351731EFW 3.87V 180mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Band 7 \/ Band 6 Series — 3.87V Li-Polymer Replacement Battery (HB351731EFW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 180mAh (0.7Wh) 3.87V lithium-polymer cell that replaces the OEM HB351731EFW battery in the Huawei Band 7, Band 6, and Band 6 Pro. It restores power to the display, optical heart rate sensor, and activity tracking modules. Physical dimensions are 29.40 × 16.30 × 3.40mm — confirm clearance before ordering if your unit has been previously repaired.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBand 7, Band 6, Band 6 Pro compatibility:\u003c\/strong\u003e\n    All three models share the HB351731EFW cell format, the same 3.87V charging rail, and an identical footprint. The BMS termination voltage and charge curve are consistent across the group, so one cell covers all three.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the HB351731EFW on the Band 7 platform and confirmed the BMS accepted the cell without a fault flag. Charge termination triggered correctly at 4.35V, and the fuel gauge IC updated its state-of-charge reading after a full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on this platform loses its calibration reference when the original cell is disconnected. Without a full charge cycle from near-zero, the percentage readout will be unreliable.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSmartwatch showing 0% immediately after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC — a small dedicated chip separate from the main SoC — stores a learned charge table for the old cell. When the cell is swapped, that reference is gone and the IC defaults to 0% or shows a flat, incorrect readout. The fix is straightforward: connect the watch to its charger right after reassembly and let it charge to 100% without interruption. Once the gauge IC completes a full cycle from near-zero, it recalibrates against the new cell's actual capacity. After that first full charge, the percentage display will track correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with the phone app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the Bluetooth controller and clears its active session keys. The Huawei Health app holds the old session in memory and may show the device as connected while the watch itself sees no active pairing. Open the Huawei Health app, go to device settings, tap \"Unpair device,\" then initiate a fresh pairing from the Band's Bluetooth menu. The watch must be fully powered on — not just showing the boot logo — before the pairing handshake will complete.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151523418,"sku":"BWCS-HNR008SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151556186,"sku":"BWCS-HNR008SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151588954,"sku":"BWCS-HNR008SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNR008SH-1.webp?v=1779760467"},{"product_id":"amazfit-a1918-replacement-battery-385v-350mah-li-polymer","title":"Amazfit A1918 Compatible Battery 3.85V 350mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmazfit T-Rex \/ Verge Lite \/ A1918 — 3.85V Li-Polymer Replacement Battery (PL512524G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 350mAh Li-Polymer cell that replaces part number PL512524G in the Amazfit A1918, A1808, T-Rex, Verge Lite, and A1801 smartwatches. It fits when the original cell no longer holds charge after extended use or repeated shallow cycling. Dimensions are 24.00 × 24.20 × 5.30mm — measure your existing cell before ordering if you have an unknown revision.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA1918, A1808, T-Rex, Verge Lite, A1801 compatibility:\u003c\/strong\u003e\n    These five models share the same battery footprint, connector pinout, and BMS handshake voltage — all run the same PL512524G cell on a 3.85V nominal rail with matching protection thresholds.\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 A1918 platform. The BMS accepted the cell without fault codes, protection cutoff triggered correctly at low voltage, and the fuel gauge IC registered charge state accurately after a full calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging requirement:\u003c\/strong\u003e\n    Place the watch on its charger immediately after fitting this cell and charge to 100% before using the watch. The fuel gauge IC on this platform loses its reference point when the cell is swapped and cannot read charge state accurately without a full charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Verge Lite and T-Rex drain this cell faster in the first week\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell has a slightly different internal impedance than a degraded original. The heart rate and SpO2 sensors on these models adjust their drive current based on signal return, and a fresh cell with lower impedance can cause the sensor subsystem to pull more current than usual during the first several charge cycles. This normalises once the fuel gauge IC recalibrates and the sensors settle on the new cell's impedance profile. No action is needed — full capacity and normal draw stabilise within five to seven days of regular use.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch shows 0% and will not wake after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has lost its charge reference — a direct result of removing power during the swap. The IC does not fabricate a reading; it defaults to 0% when it has no valid state-of-charge data. Connecting the watch to its magnetic charger resets the IC and initiates a calibration cycle from the known near-zero starting point. Leave it on charge until it reads 100% — at that point the IC has a valid reference and normal battery indication resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151621722,"sku":"BWCS-AMT918SH-1","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151654490,"sku":"BWCS-AMT918SH-2","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151687258,"sku":"BWCS-AMT918SH-3","price":45.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AMT918SH-1.webp?v=1779760466"},{"product_id":"samsung-sm-r960-replacement-battery-388v-410mah-li-polymer","title":"Samsung Galaxy Watch 4 Classic Replacement Battery 3.88V 410mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Watch 6 Classic 47mm — 3.88V Li-Polymer Replacement Battery (GH43-05162A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.88V, 410mAh Li-Polymer cell replaces the original battery in the Samsung Galaxy Watch 6 Classic 47mm, SM-R960, and SM-R965. It restores power to the display, processor, heart rate sensor, and wireless connectivity stack. Fit the new cell when the original no longer holds charge through a full day of typical use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-R960 and SM-R965 compatibility:\u003c\/strong\u003e\n    Both watch variants share the same physical cell format, voltage rail, and BMS connector pinout. The fuel gauge IC on both models reads the same cell impedance profile, so the handshake completes without errors on either variant.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the SM-R965 platform. The BMS accepted the cell without fault codes, fuel gauge initialised after a full charge cycle, and all sensor draws — including continuous heart rate — stayed within expected current limits.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch immediately on its magnetic charger and bring it to 100% before first use. The fuel gauge IC on these Galaxy Watch platforms loses its reference point when the cell is swapped and cannot recalibrate accurately without one complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Galaxy Watch 6 Classic reports 0% immediately after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Galaxy Watch 6 Classic uses a dedicated fuel gauge IC that tracks battery state by accumulating charge and discharge data over time. When the cell is removed, that accumulated reference is wiped. The IC has no baseline to work from, so it defaults to reporting 0% or shuts the display off entirely. This is not a fault with the replacement cell. Place the watch on its charger straight after reassembly and charge uninterrupted to 100% — the gauge recalibrates during that first full cycle and will read accurately from then on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charge contacts not seating after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch sits on the magnetic charger but shows no charging indicator, the rear contact pads have likely shifted slightly during the swap. Even a fraction of a millimetre of misalignment breaks the circuit between the charger pins and the watch contacts. Remove the watch from the charger, press the rear cover firmly and evenly until it clicks flush, then reseat it on the charger. Confirm the charging icon appears within 10 seconds of placement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151720026,"sku":"BWCS-SMR965SH-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151752794,"sku":"BWCS-SMR965SH-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151785562,"sku":"BWCS-SMR965SH-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR965SH-1.webp?v=1779760485"},{"product_id":"samsung-galaxy-watch-6-classic-43mm-replacement-battery-388v-260mah-li-polymer","title":"Samsung Galaxy Watch 6 Classic 43mm Replacement Battery 3.88V 260mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Watch 6 Classic 43mm — 3.88V Li-Polymer Replacement Battery (GH43-05160A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.88V, 260mAh Li-Polymer cell for the Samsung Galaxy Watch 6 Classic 43mm, covering SM-R950 and SM-R955 variants. It replaces a degraded original cell in watches that no longer hold a charge through a full day of normal use. OEM part numbers GH43-05160A and EB-BR955ABY both cross to this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSM-R950 and SM-R955 fitment:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector orientation, and BMS handshake protocol — the same 21.30 x 21.10 x 4.70mm cell fits either watch without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a Watch 6 Classic unit. The BMS accepted the cell without fault codes, and the fuel gauge IC initialised correctly after a full charge from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on this platform loses its reference point during cell removal — it cannot recalibrate unless it completes a full charge cycle starting from near-zero. Skipping this step causes the watch to report inaccurate percentages for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Watch 6 Classic reports wrong battery percentages after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch 6 Classic uses a fuel gauge IC that tracks charge state by counting coulombs from a known reference point. When you remove the old cell, that reference is wiped. The IC wakes up with a new cell and guesses the starting state — often incorrectly. A full charge cycle from near-zero gives the IC a clean upper calibration point, and a subsequent drain to around 10% sets the lower point. Until both points are established, percentage readings are estimates and will jump or drop unexpectedly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charger not making contact after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch 6 Classic charges through a magnetic puck that aligns to contact pads on the watch case back. If the back cover shifts even slightly during reassembly, the pads can sit off-centre relative to the charger coil and charging pins. The watch will show no charging indicator even though it appears seated on the puck. Re-seat the case back, press firmly around the perimeter until it clicks flush, then place it on the charger and confirm the charging icon appears within 10 seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151818330,"sku":"BWCS-SMR950SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151851098,"sku":"BWCS-SMR950SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151883866,"sku":"BWCS-SMR950SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMR950SH-1.webp?v=1779760485"},{"product_id":"huawei-watch-1-replacement-battery-38v-270mah-li-polymer","title":"Huawei Watch 1 Compatible Battery HB442528EBC 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch 1 — 3.8V Li-Polymer Replacement Battery (HB442528EBC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 270mAh Li-Polymer cell is a direct cell replacement for the Huawei Watch 1 smartwatch. It matches the OEM part number HB442528EBC and fits the original battery bay at 27.50 x 24.00 x 3.50mm. If your Watch 1 no longer holds charge through a day of normal use, this cell addresses the degraded capacity in the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHuawei Watch 1 platform fit:\u003c\/strong\u003e\n    The Watch 1 runs a single-cell 3.8V Li-Polymer architecture. This cell matches that voltage rail and the flex connector orientation the watch's charging and power management IC expects. No adapter or modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Watch 1 platform. The BMS accepted the new cell without flagging a fault, and the fuel gauge IC tracked state-of-charge correctly after a full conditioning cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before first use. The fuel gauge IC on the Watch 1 loses its reference point when the cell is swapped. Without a full charge cycle from near-zero, the percentage reading will be inaccurate from the first use.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Watch 1 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch 1 uses a coulomb-counting fuel gauge IC that tracks charge in and out of the cell over time. When the original cell is removed, the IC loses its accumulated reference data. It cannot accurately estimate capacity on a new cell without recalibrating. One full charge from near-zero to 100% gives the IC the reference point it needs to report correctly going forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery kills the BLE stack mid-session. The phone retains the old pairing record, but the watch boots with no active session — so the two devices see each other as unrecognised. The fix is to remove the watch from your phone's Bluetooth settings entirely, then re-initiate pairing through the Huawei Health app from scratch. Do not just tap \"connect\" on an existing entry — delete it first, then pair fresh.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416151916634,"sku":"BWCS-HUW100SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416151949402,"sku":"BWCS-HUW100SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416151982170,"sku":"BWCS-HUW100SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUW100SH-1.webp?v=1779760468"},{"product_id":"huawei-watch-gt-3-se-replacement-battery-387v-450mah-li-polymer","title":"Huawei Watch GT 3 SE Compatible Battery HB532629EFW 3.87V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch GT 3 SE \/ Watch GT Runner — 3.87V Li-Polymer Replacement Battery (HB532629EFW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.87V, 450mAh Li-Polymer cell replaces the HB532629EFW battery in the Huawei Watch GT 3 SE, Watch D, Watch GT Runner, and MYL-B10. It restores power to the display, heart rate sensor, GPS, and SpO2 monitor when the original cell can no longer hold a charge. Dimensions are 26.50 × 25.70 × 5.00mm — confirm fitment before opening the watch.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGT 3 SE and GT Runner platform:\u003c\/strong\u003e\n    These models share the HB532629EFW cell because they run the same Kirin A1 chipset on the same 3.87V rail with an identical flex connector and BMS handshake. The fuel gauge IC expects this exact cell impedance to report state-of-charge accurately.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We seated this cell in a GT 3 SE unit, confirmed the BMS accepted the new impedance without a protection trip, and verified that the fuel gauge reported charge state correctly after one full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging step:\u003c\/strong\u003e\n    After fitting the new cell, place the watch on its magnetic charger immediately and charge to 100% before using it. The fuel gauge IC on this platform loses its reference when the cell is swapped and cannot recalibrate without a full charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GT 3 SE reports 0% and shuts down immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GT 3 SE uses a coulomb-counting fuel gauge IC that tracks charge by measuring current in and out of the cell over time. When the cell is disconnected, that accumulated reference is wiped. The IC then reads the new cell's open-circuit voltage but has no historical baseline, so it defaults to 0% and triggers a low-battery shutdown before the watch boots fully. Putting the watch straight onto the charger and letting it reach 100% gives the IC the fixed endpoint it needs to rebuild its state-of-charge map.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew battery draining to flat within a single day on the GT 3 SE\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn this platform, simultaneous always-on display, continuous heart rate monitoring, and active GPS can pull the 450mAh cell down faster than most users expect — this is not a fault with the replacement cell. Check the Huawei Health app and confirm that continuous SpO2 monitoring is off, since that sensor runs a constant infrared LED draw. GPS should be set to \"Smart\" mode rather than \"Continuous\" unless actively tracking a route. If drain remains abnormal after those changes, verify the charge contacts are fully seated against the rear of the watch, as a partial connection can cause the charger to cut out before the cell reaches a true 4.35V full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152014938,"sku":"BWCS-HUB100SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152047706,"sku":"BWCS-HUB100SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152080474,"sku":"BWCS-HUB100SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUB100SH-1.webp?v=1779760467"},{"product_id":"honor-mus-b19-replacement-battery-387v-460mah-li-polymer","title":"Honor MUS-B19 Smartwatch Compatible Battery 3.87V 460mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHonor MUS-B19 \/ GS3 \/ GS Pro — 3.87V Li-Polymer Replacement Battery (HB522628EFW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.87V, 460mAh Li-Polymer cell for the Honor Watch Fit (MUS-B19), GS3, and GS Pro smartwatches. It replaces the original HB522628EFW battery when the existing cell no longer holds charge or powers the watch through the day. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMUS-B19, GS3, and GS Pro compatibility:\u003c\/strong\u003e\n    These three models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — all three accept the HB522628EFW cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the MUS-B19 platform. The BMS accepted the new cell without throwing a fault, and the fuel gauge IC updated state-of-charge correctly across a full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on these watches loses its reference point when the cell is disconnected — it cannot report accurate charge percentage until it completes one full charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Honor Watch Fit shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GS3 and MUS-B19 platforms use a coulomb-counting fuel gauge IC that tracks charge by measuring current in and out of the cell. When you remove the old battery, that counter resets to zero and has no reference for the new cell's state. The watch then reports 0% — or shuts off — because the IC has no data to work from. Placing the watch on charge immediately after the swap and running it to full resolves this. After one complete charge cycle, the gauge recalibrates and percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with the Honor app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery terminates the active BLE session between the watch and your phone. The phone retains the old pairing record, but the watch starts fresh with no session data — the two devices no longer recognise each other automatically. On the phone, go to Bluetooth settings, forget the watch entirely, then open the Honor Health app and run a new pairing from scratch. Do not attempt to reconnect through the Bluetooth menu alone; pairing must be initiated through the app to re-establish the full health-data link.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152375386,"sku":"BWCS-HNR319SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152408154,"sku":"BWCS-HNR319SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152440922,"sku":"BWCS-HNR319SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HNR319SH-1.webp?v=1779760467"},{"product_id":"huawei-watch-gt4-41mm-replacement-battery-387v-490mah-li-polymer","title":"Huawei Watch GT4 41mm Replacement Battery HB572727EFW 490mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch GT4 41mm — 3.87V Li-Polymer Replacement Battery (HB572727EFW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 490mAh (1.9Wh) Li-Polymer cell is a direct replacement for the Huawei Watch GT4 41mm. It restores power to the display, heart rate sensor, GPS, and BLE radio when the original cell has degraded or failed to hold a charge. Voltage matches the watch's 3.87V power rail exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGT4 41mm platform fit:\u003c\/strong\u003e\n    The 41mm GT4 uses a smaller chassis than the 46mm variant, with a distinct cell footprint of 25.60 × 25.00 × 5.40mm. The HB572727EFW matches that footprint. Fitting a 46mm cell here will not work — the connector pitch and cell dimensions differ.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the GT4 41mm platform. The BMS accepted the cell without error flags, and the fuel gauge IC registered correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on this platform loses its reference point when the original cell is removed. Without a full charge cycle from near-zero, the gauge will report inaccurate percentages for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLE session loss after battery removal on the GT4 41mm\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eCutting power to the GT4 41mm during a cell swap drops the active Bluetooth session stored in the watch's memory. The watch does not automatically re-establish pairing with the phone — it treats itself as a new device. Open the Huawei Health app, navigate to device settings, remove the watch, then re-pair it from scratch. The watch MAC address stays the same, so health data and settings stored in the app are not lost.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch shows 0% and will not power on immediately after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a fuel gauge IC issue, not a faulty cell. When the original battery is disconnected, the IC loses its charge reference and defaults to 0%. The watch may refuse to boot because it reads the battery as critically empty, even though the new cell has residual charge. Place it on the charger for at least 15 minutes until the display shows a charging indicator, then allow it to reach 100% before use. Do not attempt a hard reset until the gauge has completed one full charge cycle from below 5%.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152473690,"sku":"BWCS-HUP441SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152506458,"sku":"BWCS-HUP441SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152539226,"sku":"BWCS-HUP441SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP441SH-1.webp?v=1779760467"},{"product_id":"huawei-watch-gt-46mm-replacement-battery-382v-420mah-li-polymer","title":"Huawei Watch GT 46mm Replacement Battery HB512627ECW+ 3.82V 420mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch GT 46mm — 3.82V Li-Polymer Replacement Battery (HB512627ECW+)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.82V, 420mAh Li-Polymer cell is a direct replacement for the Huawei Watch GT 46mm (FTN-B19). It restores power to the smartwatch after the original cell has degraded and can no longer hold a charge through a full day of use. Capacity is 420mAh (1.6Wh), matching the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWatch GT 46mm and FTN-B19 fitment:\u003c\/strong\u003e\n    Both model references use the same 26.40 × 25.30 × 5.10mm cell cavity, the same flex connector, and the same BMS handshake over the protection circuit. One cell covers both variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the GT 46mm charge controller and confirmed the BMS accepted the new cell without tripping low-voltage lockout. Protection circuit cut in cleanly at the expected threshold with no fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on the GT 46mm cannot calibrate its state-of-charge reference without a full charge cycle from near-zero following a cell swap. Skipping this step causes the display to read inaccurate percentages from the first boot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the GT 46mm fuel gauge reads incorrectly after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe GT 46mm uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow over time. When the cell is removed, that running count is lost. The IC wakes with no reference point and estimates state-of-charge from the open-circuit voltage of the new cell. A brand-new Li-Polymer cell at rest sits near 3.8V, which maps to roughly 50–60% on most fuel gauge tables — so the watch may show a misleading mid-range figure on first boot. A full charge cycle from near-zero resets the calibration and aligns the gauge to the actual cell capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to the Huawei Health app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE stack completely, which clears the active pairing session stored in volatile memory. The phone retains its saved device record, but the watch wakes with no matching session — so the Huawei Health app shows the device as unavailable or stuck on \"connecting.\" Open the Huawei Health app, go to the device settings, select \"Unpair device,\" then re-initiate the pairing process from scratch. The watch will generate a new pairing code and restore the connection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152571994,"sku":"BWCS-HUB460SH-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152604762,"sku":"BWCS-HUB460SH-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152637530,"sku":"BWCS-HUB460SH-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUB460SH-1.webp?v=1779760467"},{"product_id":"garmin-std-810g-replacement-battery-387v-340mah-li-polymer","title":"Garmin Fenix 2 STD-810G Replacement Battery 3.87V 340mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin Fenix 2 \/ Instinct Solar — 3.87V Li-Polymer Replacement Battery (361-00164-10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.87V, 340mAh lithium-polymer cell replaces the original battery in the Garmin Fenix 2 smartwatch (STD-810G) and Instinct Solar. It matches the OEM footprint at 36.80 × 24.70 × 3.00mm, so it seats correctly against the watch's connector without modification. Voltage and capacity are drawn from the product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFenix 2 and Instinct Solar compatibility:\u003c\/strong\u003e\n    Both watches share OEM part numbers 361-00164-10, 361-00164-00, and 361-00136-10. The connector pinout and cell dimensions are identical across this group, so one cell covers both platforms without adapter work.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Fenix 2 unit. The BMS accepted the new cell without fault codes, and the fuel gauge responded correctly once a full charge cycle completed from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge after cell swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge it fully to 100% before use. The fuel gauge IC on these Garmin platforms loses its reference when the cell is removed — it cannot recalibrate without a complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS and continuous heart rate monitoring load on a fresh 340mAh cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Fenix 2 runs GPS, barometric altimeter, and optical heart rate simultaneously during activity tracking. That combined draw is substantial relative to a 340mAh cell. A new cell at full impedance will show a steeper apparent voltage drop during the first few charge-discharge cycles than the worn cell it replaced — this is normal cell settling, not a capacity defect. After three to five full cycles, the voltage curve stabilises and the fuel gauge reads accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the cell cuts power to the BLE stack entirely, which drops the active pairing session stored in volatile memory. The phone's Bluetooth settings still show the watch as a saved device, but the handshake no longer completes. Go into your phone's Bluetooth settings, forget the Garmin device, then re-pair through the Garmin Connect app from scratch. The watch needs to be powered on and showing the pairing screen before the app scan will find it.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152670298,"sku":"BWCS-GMT810SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152703066,"sku":"BWCS-GMT810SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152735834,"sku":"BWCS-GMT810SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMT810SL-1.webp?v=1779760467"},{"product_id":"fossil-sport-smartwatch-replacement-battery-38v-260mah-li-polymer","title":"Fossil Sport Smartwatch APP00221 Replacement Battery 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Sport \/ Gen 4 \/ Gen 5 Smartwatch — 3.8V Li-Polymer Replacement Battery (APP00221)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 260mAh lithium-polymer cell replaces part number APP00221 in the Fossil Sport, Gen 4, and Gen 5 smartwatches. The original cell degrades over charge cycles, causing shorter battery life and eventual failure to hold charge. Swapping this cell restores full watch operation across fitness tracking, notifications, and timekeeping.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSport, Gen 4, and Gen 5 compatibility:\u003c\/strong\u003e\n    All three models use the same 29.10 x 23.40 x 4.00mm cell footprint, the same 3.8V nominal rail, and share the APP00221 part number — the connector and BMS handshake are identical across the lineup.\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 Gen 5 platform. The BMS accepted the cell without fault codes, and the fuel gauge IC registered voltage correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC in these watches loses its reference point during a cell swap — it cannot recalibrate unless it sees a full charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch shows 0% immediately after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on Fossil smartwatches tracks state-of-charge by logging cumulative charge and discharge from a known reference point. When the cell is removed, that reference is lost entirely. The IC has no way to estimate where the new cell sits in its charge curve until it runs a full cycle. Place the watch on charge straight away and let it reach 100% — the gauge resets its reference at that point and will read accurately from then on.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining in one day after a new cell is fitted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlways-on display mode combined with continuous heart rate monitoring can pull significantly more current than the standard polling interval. On the Gen 5 platform, continuous HR monitoring alone keeps the optical sensor active at a constant draw rather than sampling in short bursts. Check the Fossil Wear OS app and confirm HR mode is set to automatic rather than continuous. If drain persists after that change, check whether always-on display was re-enabled during the pairing process after the swap.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152768602,"sku":"BWCS-FTL221SH-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152801370,"sku":"BWCS-FTL221SH-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152834138,"sku":"BWCS-FTL221SH-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTL221SH-1.webp?v=1779760467"},{"product_id":"fossil-kate-spade-dw9p1-replacement-battery-38v-350mah-li-polymer","title":"Fossil Kate Spade DW9P1 Smartwatch Replacement Battery 3.8V 350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Kate Spade DW9P1 \/ DW9K1 — 3.8V Li-Polymer Replacement Battery (APP00286)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 350mAh lithium-polymer cell replacing part number APP00286 in the Kate Spade DW9P1 and DW9K1 smartwatches. Both watches share the same battery bay geometry (28.00 × 23.50 × 4.20mm) and BMS handshake, so one part covers both references. Capacity matches the original spec exactly — no guesswork on fit or connector polarity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDW9P1 and DW9K1 platform compatibility:\u003c\/strong\u003e\n    These two Kate Spade models share the same mainboard revision and fuel gauge IC. The connector pinout, physical footprint, and BMS communication protocol are identical across both, so APP00286 is the correct cell for either watch without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a DW9P1 mainboard and confirmed the BMS accepted the cell without throwing a fault code. Charge acceptance reached full capacity within the first cycle, and the fuel gauge reported correctly after calibration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle on Kate Spade watches:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before use. The fuel gauge IC on this platform loses its reference point when the original cell is removed — it cannot calibrate accurately without a full charge from near-zero after a swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DW9P1 shows incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DW9P1 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored baseline. When the original cell is removed, that baseline is wiped. The IC then reads the new cell's open-circuit voltage and makes a rough estimate — often wildly inaccurate. A full charge cycle from near-zero resets the baseline and restores accurate percentage reporting. Until that cycle completes, readings of 0%, 100%, or random jumps are all expected behaviour, not a faulty cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to the app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving power kills the active Bluetooth Low Energy session between the DW9P1 and the paired phone. The watch does not automatically re-establish that session on reboot — the phone treats it as a disconnected device. Go to the phone's Bluetooth settings, forget the watch, then re-pair through the Kate Spade Connected app from scratch. Do not attempt to re-pair without first forgetting the old pairing entry — that step is skipped most often and causes the re-pair to fail.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152899674,"sku":"BWCS-FTL286SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416152932442,"sku":"BWCS-FTL286SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416152965210,"sku":"BWCS-FTL286SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTL286SH-1.webp?v=1779760467"},{"product_id":"puma-smartwatch-dw9p1-replacement-battery-38v-350mah-li-polymer","title":"Puma SmartWatch DW9P1 Replacement Battery 3.8V 350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePuma SmartWatch DW9P1 — 3.8V Li-Polymer Replacement Battery (APP00286)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 350mAh Li-Polymer cell replaces the original APP00286 battery in the Puma SmartWatch DW9P1. It restores power to activity tracking, heart rate monitoring, notifications, and the display. Dimensions are 28.00 × 23.50 × 4.20mm — confirm clearance inside the case before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDW9P1 platform fit:\u003c\/strong\u003e\n    The DW9P1 uses a compact Li-Polymer cell with a specific footprint and connector orientation tied to the watch's power management IC. This cell matches that footprint, voltage rail, and connector pin layout so the BMS handshake completes normally on power-up.\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 DW9P1 platform and confirmed the fuel gauge IC registered capacity correctly after a full charge cycle from near-zero. BMS protection tripped as expected at both low-voltage cutoff and overcharge thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its charger immediately and run a full charge to 100% before use. The fuel gauge IC on this platform loses its reference point when the cell is swapped and cannot recalibrate without a complete charge cycle from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DW9P1 shows 0% or refuses to power on after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DW9P1 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored reference. When you remove the old cell, that reference is erased. The IC starts from an unknown state and often defaults to 0% or holds the watch in a protective shutdown. Placing the watch on charge immediately after fitting the new cell allows the IC to run a full calibration pass. Once charge reaches 100%, the gauge reference resets and the watch powers on and reports accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew battery draining to empty within a single day on the DW9P1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA 350mAh cell in continuous heart rate monitoring mode draws significantly more current than in basic step-counting mode. If the DW9P1 is set to always-on display alongside continuous HR polling, current draw can be three to four times higher than the device's standby baseline. Check the watch settings and switch HR monitoring from continuous to on-demand if multi-day life is the priority. Also confirm the display timeout is not set to always-on — that single setting is the most common cause of unexpectedly fast drain on this platform.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416152997978,"sku":"BWCS-FTL286SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153030746,"sku":"BWCS-FTL286SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153063514,"sku":"BWCS-FTL286SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTL286SH-1.webp?v=1779760467"},{"product_id":"fossil-q-marshal-gen-4-replacement-battery-38v-330mah-li-polymer","title":"Fossil APP00276 Q Marshal Gen 4 Smartwatch Replacement Battery 3.8V 330mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Q Marshal Gen 4 — 3.8V Li-Polymer Replacement Battery (APP00276)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 330mAh Li-Polymer cell is a direct swap for the original APP00276 battery in the Fossil Q Marshal Gen 4 smartwatch. It fits the 29.60 x 24.00 x 3.80mm battery bay and matches the original connector pinout. Replace this when the watch can no longer hold a charge through a full day of normal use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQ Marshal Gen 4 fitment:\u003c\/strong\u003e\n    The Gen 4 platform uses a BMS handshake tied to this cell's impedance profile. Swapping to a cell of the correct voltage and capacity keeps the fuel gauge IC reading accurately and prevents false low-battery shutdowns.\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 Q Marshal Gen 4 board. The BMS accepted the new cell without error flags, and the fuel gauge recalibrated correctly after a full charge from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on the Q Marshal Gen 4 loses its reference point during a cell swap and cannot recalibrate without a full charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Q Marshal Gen 4 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Q Marshal Gen 4 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a known baseline. When you remove the old cell, that baseline is wiped. The watch reports 0% — or refuses to boot — because the IC has no reference point, not because the new cell is flat. Fit the battery, connect the charger, and let it reach 100% without interruption. The IC re-establishes its reference at full charge, and the percentage display returns to normal from that point forward.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining in one day instead of multi-day on the Q Marshal Gen 4\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlways-on display mode combined with continuous heart rate monitoring pulls a sustained current that a 330mAh cell was not sized to sustain for multiple days. Check Wear OS settings and confirm that always-on display and continuous HR tracking are both turned off — tilt-to-wake and on-demand HR extend charge intervals significantly. If drain remains heavy after those changes, check that no background app is holding a persistent BLE connection. Under typical notification and step-tracking use, charge level should remain above 20% at end of day.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153096282,"sku":"BWCS-FTL276SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153129050,"sku":"BWCS-FTL276SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153161818,"sku":"BWCS-FTL276SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTL276SH-1.webp?v=1779760505"},{"product_id":"fossil-launches-lte-replacement-battery-38v-300mah-li-polymer","title":"Fossil Launches LTE Smartwatch Replacement Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Launches LTE — 3.8V Li-Polymer Replacement Battery (APP00277)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 300mAh Li-Polymer cell replaces the original battery in the Fossil Launches LTE smartwatch. It restores power to the display, processor, BLE radio, heart rate sensor, and LTE modem. Dimensions are 28.80 × 23.70 × 3.80mm — match these before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLaunches LTE platform fit:\u003c\/strong\u003e\n    The Launches LTE draws across multiple subsystems simultaneously — LTE modem, optical HR sensor, and Wear OS processor share a single cell. This cell matches the voltage rail and connector footprint that platform requires.\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 Launches LTE platform. The BMS accepted the cell without fault flags, and the fuel gauge IC registered charge state correctly after a full initial cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    Place the watch on its charger immediately after fitting this cell and charge to 100% before use. The fuel gauge IC on Wear OS platforms cannot set an accurate reference point without one full charge cycle from near-zero following a cell change.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLTE modem current spikes and what they do to a small cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LTE radio in the Launches LTE pulls short, sharp current spikes when it registers on a network or syncs data — more than the HR sensor or display draw individually. A worn original cell sags in voltage during these spikes, triggering low-voltage shutoff before the display reads empty. A fresh 300mAh cell at full specification handles these transient loads without the same voltage sag. If you still see unexpected shutoffs after fitting this cell, check that LTE is not set to continuous background sync.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the original cell clears the active BLE session between the watch and its paired phone. The phone retains the old pairing record, but the watch boots with no matching session — so the connection never re-establishes on its own. Open the Fossil app on your phone, remove the existing watch entry, then run a fresh pair from the watch's Bluetooth settings. Once paired, the watch reconnects to Google account sync and notification relay normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153194586,"sku":"BWCS-FTL277SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153227354,"sku":"BWCS-FTL277SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153260122,"sku":"BWCS-FTL277SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTL277SH-1.webp?v=1779760505"},{"product_id":"fossil-sport-41mm-gen-4-replacement-battery-385v-350mah-li-polymer","title":"Fossil Sport 41mm Gen 4 Replacement Battery 3.85V 350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Sport 41mm Gen 4 — 3.85V Li-Polymer Replacement Battery (APP00286)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 350mAh lithium-polymer cell is a direct replacement for the Fossil Sport 41mm Gen 4 smartwatch. It fits the internal battery cavity using the original dimensions of 28.20 x 23.50 x 4.30mm and connects to the existing flex ribbon. Replace it when your watch no longer holds charge through the day or fails to power on.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSport 41mm Gen 4 fitment:\u003c\/strong\u003e\n    This cell matches the voltage rail and physical footprint the Gen 4 platform requires. The BMS on the Snapdragon Wear board expects a 3.85V nominal cell — fitting a lower-voltage cell causes the fuel gauge IC to report incorrect state-of-charge from the first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Gen 4 board, confirmed the BMS accepted the cell without a protection fault, and verified the fuel gauge stabilised after one full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge protocol:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before first use. The fuel gauge IC on this platform cannot calibrate its reference point without a full charge cycle following a cell swap — skipping this step causes persistent 0% readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Sport 41mm Gen 4 shows erratic percentages after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Gen 4 uses a coulomb-counting fuel gauge tied to the original cell's charge history. When you remove the old cell, that reference is wiped. The IC starts estimating state-of-charge from zero context, so it often reports 0%, 1%, or jumps erratically in the first few hours. This is not a fault with the replacement cell. A full charge cycle from near-depletion to 100% gives the IC enough data to recalibrate — after that, percentage readings stabilise.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery draining in one day instead of multi-day after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAlways-on display mode combined with continuous heart rate polling is the most common cause of single-day drain on the Gen 4. The heart rate sensor runs a constant optical draw that compounds quickly when the display never sleeps. Check the Fossil app and disable always-on display, then set heart rate monitoring to periodic rather than continuous. Continuous HR alone can pull the 350mAh cell down to 3.5V within 18 hours under normal use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153292890,"sku":"BWCS-FTS414SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153325658,"sku":"BWCS-FTS414SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153358426,"sku":"BWCS-FTS414SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTS414SH-1.webp?v=1779760505"},{"product_id":"movado-connect-2040-replacement-battery-38v-270mah-li-polymer","title":"Movado Connect 2.0\/40 Compatible Battery 3.8V 270mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMovado Connect 2.0\/40 — 3.8V Li-Polymer Replacement Battery (APP00302)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 270mAh lithium-polymer cell replaces the original battery in the Movado Connect 2.0\/40 smartwatch. It powers the display, processor, heart rate sensor, and Bluetooth radio. Dimensions are 28.60 × 23.50 × 3.70mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConnect 2.0\/40 platform fit:\u003c\/strong\u003e\n    The 40mm Connect 2.0 uses a fixed connector orientation and a slim 3.70mm profile dictated by the case depth. This cell matches that connector and profile exactly, keeping the BMS handshake intact so the watch reports charge state correctly.\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 Connect 2.0\/40 platform. The BMS accepted the new cell without fault codes, and the fuel gauge IC re-referenced correctly after a full charge from near-zero following swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging protocol:\u003c\/strong\u003e\n    After fitting, place the watch on its magnetic charger immediately and charge to 100% before wearing it. The fuel gauge IC on this platform cannot calibrate its capacity reference without one complete charge cycle from near-zero after a cell swap — skipping this step causes persistent 0% or erratic percentage readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Connect 2.0\/40 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Connect 2.0\/40 uses a fuel gauge IC that tracks charge state by monitoring coulombs in and out of a known reference cell. When you remove the old battery, that reference is lost entirely. The IC has no baseline for the new cell, so it defaults to or reports 0%. Placing the watch on charge immediately after reassembly and running a full charge to 100% gives the IC the reference point it needs. Do not skip this step — the percentage display will remain unreliable until that first full cycle completes.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew battery draining in one day instead of the expected multi-day span\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the Connect 2.0\/40, always-on display mode combined with continuous heart rate monitoring can pull enough current to flatten a 270mAh cell within a single day — this is a load issue, not a cell defect. Check the watch settings and confirm whether always-on display and continuous HR are both active simultaneously. Switching HR monitoring to on-demand and disabling always-on display reduces the sustained current draw significantly. If drain remains extreme after those changes, check whether a background app is keeping the Bluetooth radio in constant active scan mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153391194,"sku":"BWCS-MDC240SH-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153423962,"sku":"BWCS-MDC240SH-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153456730,"sku":"BWCS-MDC240SH-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MDC240SH-1.webp?v=1779760522"},{"product_id":"fossil-julianna-hr-ftw6035-replacement-battery-38v-300mah-li-polymer","title":"Fossil Julianna HR FTW6035 Replacement Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFossil Julianna HR FTW6035 — 3.8V Li-Polymer Replacement Battery (APP00296)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 300mAh lithium-polymer cell is a direct replacement for the Fossil Julianna HR FTW6035 smartwatch. It fits the women's hybrid smartwatch platform that runs heart rate monitoring, fitness tracking, and notification functions. Dimensions are 28.70 × 23.60 × 3.80mm — verify against the original cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJulianna HR FTW6035 fitment:\u003c\/strong\u003e\n    The FTW6035 uses a compact Li-Polymer cell constrained by the watch's slim case profile. The APP00296 matches the original cell's footprint, connector orientation, and voltage rail so the BMS handshake proceeds without faults on power-up.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a smartwatch test rig. The BMS accepted the new cell without entering lockout, and the fuel gauge IC initialised correctly after a full charge from near-zero following swap.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting the new cell. Let it charge to 100% before first use. The fuel gauge IC on the FTW6035 cannot set its reference point without a complete charge cycle from near-depletion — skipping this step causes the percentage display to read incorrectly for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FTW6035 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Julianna HR uses a fuel gauge IC that stores a learned charge reference in volatile memory. When the cell is disconnected, that reference is lost. On first power-up with a new cell, the IC has no baseline and defaults to 0% or a random low value. This is not a fault with the replacement cell. Charge the watch to 100% uninterrupted before using it — the IC resets its calibration at the top of the charge curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving power during a battery swap terminates the active BLE session between the watch and the paired phone. The phone retains the old session token, but the watch starts fresh with no matching record. The watch will not reconnect automatically in this state. Open the Fossil app, remove the watch from paired devices, then re-pair from scratch — the new BLE handshake completes in under a minute.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153489498,"sku":"BWCS-FTW603SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153522266,"sku":"BWCS-FTW603SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153555034,"sku":"BWCS-FTW603SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FTW603SH-1.webp?v=1779760505"},{"product_id":"louis-vuitton-tambour-horizon-2-replacement-battery-38v-300mah-li-polymer","title":"Louis Vuitton Tambour Horizon 2 Compatible Battery 3.8V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eLouis Vuitton Tambour Horizon 2 — 3.8V Li-Polymer Replacement Battery (APP00282)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 300mAh lithium-polymer cell for the Louis Vuitton Tambour Horizon 2 smartwatch. It replaces OEM part APP00282 and restores power to the watch's timekeeping, notifications, fitness tracking, and connectivity functions. The cell measures 24.50 x 23.30 x 4.50mm and matches the original form factor.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTambour Horizon 2 fitment:\u003c\/strong\u003e\n    The Horizon 2 uses a compact pouch-style cell on a 3.8V rail with a multi-pin connector that passes BMS data to the watch's fuel gauge IC. This replacement matches that connector pinout and cell geometry so the BMS handshake completes on first boot.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Horizon 2 platform. The BMS accepted the cell without fault codes, and the fuel gauge registered state-of-charge correctly after a full calibration cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge to 100% before first use. The Horizon 2's fuel gauge IC loses its reference point when the cell is removed and cannot recalibrate without a full charge from near-zero — skipping this step causes persistent 0% or wildly inaccurate battery readings.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tambour Horizon 2 burns through a new cell in one day\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Horizon 2 runs Wear OS with an always-on display option and continuous heart rate monitoring. Together those two features can draw enough current to deplete a 300mAh cell well inside 24 hours. A new cell on a fresh impedance profile also appears to drain faster in the first few charge cycles while the fuel gauge recalibrates its internal model. If daily drain is still excessive after three full cycles, check that always-on display is off and that heart rate is set to periodic rather than continuous in the Wear OS settings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery terminates any active Bluetooth Low Energy session and clears the watch's active connection state. The companion app on your phone holds the old session ID, which no longer matches the watch after a full power removal. Open the Louis Vuitton companion app or your phone's Bluetooth settings, forget the watch, then initiate a fresh pair from the watch's own Bluetooth menu. The watch must show its six-digit pairing code on screen — if it does not appear, restart the watch first by holding the crown for ten seconds.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153587802,"sku":"BWCS-LTH200SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153620570,"sku":"BWCS-LTH200SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153653338,"sku":"BWCS-LTH200SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-LTH200SH-1.webp?v=1779760522"},{"product_id":"montblanc-summit-s2t18-replacement-battery-38v-340mah-li-polymer","title":"Montblanc SUMMIT S2T18 Compatible Battery 3.8V 340mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMontblanc Summit S2T18 — 3.8V Li-Polymer Replacement Battery (APP00278)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 340mAh lithium-polymer cell is a direct replacement for the Montblanc Summit S2T18 smartwatch. It powers the watch's display, processor, heart rate sensor, and Bluetooth stack. Fit it when the original cell no longer holds a charge or the watch shuts off unexpectedly under load.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSummit S2T18 platform fit:\u003c\/strong\u003e\n    The Summit S2 and S2T18 share the same cell bay dimensions and connector orientation. At 27.20 × 24.30 × 4.50mm, this cell fills the cavity correctly and mates to the board connector without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge cycles through a calibrated charger and confirmed the BMS accepted charge, reported state-of-charge accurately, and cut off cleanly at full capacity. No swelling or thermal anomalies were observed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge reset after swap:\u003c\/strong\u003e\n    Place the watch on its magnetic charger immediately after fitting this cell and charge it fully to 100% before use. The fuel gauge IC on the Summit S2T18 loses its reference point when the cell is disconnected — skipping this step causes the watch to report inaccurate percentages from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Summit S2T18 drains a new cell faster than the old one in week one\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly fitted lithium-polymer cell has a slightly different impedance profile than an aged one. The Summit S2T18's power management chip adjusts its draw curve based on cell resistance readings, and it takes three to five full charge-discharge cycles to recalibrate. During this window, always-on display mode and continuous heart rate monitoring pull more aggressively because the firmware has not yet optimised the duty cycle to the new cell. After cycle five, drain behaviour normalises. Disable always-on display for the first week if you want to accelerate the calibration period.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSummit S2T18 not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery terminates the active Bluetooth Low Energy session and clears the watch's pairing keys from volatile memory. The phone retains the old pairing entry, but the watch no longer recognises it on power-up, so they cannot reconnect automatically. Go into your phone's Bluetooth settings, forget the Summit S2T18 entry entirely, then re-pair from scratch through the Montblanc Connect app. The watch must show a stable charge — at least 20% — before initiating the pairing sequence or the handshake will time out.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153686106,"sku":"BWCS-MBT218SH-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153718874,"sku":"BWCS-MBT218SH-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416153751642,"sku":"BWCS-MBT218SH-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MBT218SH-1.webp?v=1779760522"},{"product_id":"garmin-tactix-7-replacement-battery-37v-300mah-li-polymer","title":"Garmin Tactix 7 Replacement Battery 3.7V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin Tactix 7 \/ fenix 7X — 3.7V Li-Polymer Replacement Battery (361-00147-10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 300mAh lithium-polymer cell for the Garmin Tactix 7 and fenix 7X smartwatches. It replaces OEM part 361-00147-10 and restores power to the display, GPS module, heart rate sensor, and onboard navigation functions. Physical dimensions are 36.50 × 25.20 × 4.30mm — measure your existing cell before ordering if you are unsure.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTactix 7 and fenix 7X compatibility:\u003c\/strong\u003e\n    Both watches run the same power architecture — identical voltage rail, connector footprint, and BMS handshake protocol — so one cell covers both platforms without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Tactix 7 platform. The BMS accepted the new cell without fault codes, and the fuel gauge IC re-calibrated correctly after a full charge cycle from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge requirement for the Tactix 7 and fenix 7X:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before first use. The fuel gauge IC on these platforms loses its reference point when the cell is swapped and cannot recalibrate without a complete charge cycle from near-zero — skipping this step causes the watch to report inaccurate state-of-charge from day one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tactix 7 reports 0% and won't boot after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tactix 7 uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow over time. When the cell is removed, that running count resets to an undefined state. A new cell at partial charge gives the IC no valid baseline, so it defaults to 0% and the watch refuses to boot as a low-battery protection measure. The fix is straightforward: connect the magnetic charger immediately after reassembly and let it reach 100% uninterrupted. Once the IC completes a full charge sweep, it locks in the new reference and percentage readings return to normal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS and always-on display draining the new cell faster than expected\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh lithium-polymer cell presents slightly different internal impedance than a worn cell, and the Tactix 7's power management firmware adjusts current draw accordingly during the first several charge cycles. GPS tracking and always-on display mode together represent the highest sustained current load this 300mAh cell will see — running both simultaneously will noticeably shorten the charge interval compared to watch-only or step-tracking mode. This behaviour typically stabilises after three to five full charge cycles as the cell's impedance settles. If drain remains excessive beyond that point, check that the always-on display setting has not been re-enabled after the swap, as it resets to on during some firmware re-initialisation events.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416153948250,"sku":"BWCS-GMT700SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416153981018,"sku":"BWCS-GMT700SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416154013786,"sku":"BWCS-GMT700SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMT700SH-1.webp?v=1779760505"},{"product_id":"huawei-watch-5-replacement-battery-388v-780mah-li-polymer","title":"Huawei Watch 5 HB652933EGW Compatible Battery 3.88V 780mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Watch 5 \/ Watch 5X \/ Watch 5X Pro — 3.88V Li-Polymer Replacement Battery (HB652933EGW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.88V, 780mAh lithium-polymer cell carrying OEM part number HB652933EGW. It fits the Huawei Watch 5, Watch 5X, and Watch 5X Pro smartwatches. Dimensions are 31.60 × 28.00 × 6.60mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWatch 5 series compatibility:\u003c\/strong\u003e\n    The Watch 5, Watch 5X, and Watch 5X Pro share the same battery bay geometry, connector pin-out, and BMS handshake protocol. All three accept HB652933EGW without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the Watch 5 platform. The BMS accepted the cell without error flags, fuel gauge recalibrated correctly after a full charge cycle, and health sensors remained active throughout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charge cycle:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and bring it to 100% before first use. The fuel gauge IC loses its reference point during a cell swap. Without a full charge from near-zero, the percentage display will read inaccurately for days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy continuous heart rate monitoring shortens charge intervals on a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Watch 5 series uses a multi-wavelength optical sensor for continuous HR tracking. On a new cell, internal impedance is slightly higher than a broken-in cell, so the sensor draws a marginally larger current to maintain signal quality. This effect typically flattens out after five to seven full charge cycles as the cell's internal resistance drops. During that break-in window, charge intervals may be shorter than expected — this is normal and not a fault with the replacement cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing to phone after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery cuts power to the BLE stack entirely, which terminates the active session stored on both the watch and the paired phone. When the watch restarts, it generates a new session key that the phone does not recognise. Open the Huawei Health app, navigate to device settings, remove the existing watch entry, and re-pair from scratch. The watch should appear in the device list within 30 seconds of initiating a fresh pairing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416154046554,"sku":"BWCS-HUX510SH-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416154079322,"sku":"BWCS-HUX510SH-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416154112090,"sku":"BWCS-HUX510SH-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUX510SH-1.webp?v=1779760505"},{"product_id":"garmin-tactix-delta-solar-replacement-battery-37v-300mah-li-polymer","title":"Garmin Tactix Delta Solar Replacement Battery 3.7V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin Tactix Delta Solar \/ Fenix 6X — 3.7V Li-Polymer Replacement Battery (361-00126-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 300mAh Li-Polymer cell replaces the OEM battery in the Garmin Tactix Delta Solar, Fenix 6X, and Fenix 6X Pro Solar. All three watches use the same 361-00126-00 cell on a shared board layout with an identical connector and BMS handshake. Dimensions are 36.00 × 24.80 × 4.00mm — verify your original cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTactix Delta Solar, Fenix 6X, Fenix 6X Pro Solar:\u003c\/strong\u003e\n    These models share the same battery bay dimensions, the same 3-pin flex connector, and the same fuel gauge IC. One cell covers all three — no wiring adapters or firmware differences to work around.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a Fenix 6X board. The BMS accepted the cell cleanly, the fuel gauge initialised without fault codes, and solar charging resumed normally once the watch was placed under a charge source.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the Tactix Delta Solar:\u003c\/strong\u003e\n    The solar charging layer on the Tactix Delta Solar adds a trickle input to the charge circuit. After fitting this cell, connect the watch to its magnetic USB charger — not just sunlight — and run a full charge to 100%. The solar input alone will not trigger a proper fuel gauge calibration cycle after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Tactix Delta Solar reads incorrect battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Tactix Delta Solar uses a coulomb-counting fuel gauge IC that tracks charge state against a stored reference. When the cell is removed, that reference is lost. The IC wakes up with the new cell and has no baseline to work from, so it reports an arbitrary or incorrect percentage. A full charge cycle from near-zero resets the reference and restores accurate readings. Until that cycle completes, percentage figures are unreliable — do not rely on them to judge whether the swap worked.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMagnetic charge contacts not making after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch does not respond to the magnetic charger after a battery swap, the charge contacts on the case back have likely shifted slightly during reassembly. Press the charger puck firmly against the rear contacts and rotate it a few degrees in each direction while watching for the charging indicator. If no indicator appears, remove the case back, check that the contact pads are seated flat, and reseat the back cover before retrying. The puck needs metal-to-metal contact across all four pins — even a 1mm misalignment breaks the circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416154144858,"sku":"BWCS-GMF600SL-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416154177626,"sku":"BWCS-GMF600SL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416154210394,"sku":"BWCS-GMF600SL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GMF600SL-1.webp?v=1779760505"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/collections\/BW-CS-FTB505SH-5.webp?v=1780878741","url":"https:\/\/batteryweb.com\/collections\/smartwatch.oembed?page=5","provider":"BatteryWeb","version":"1.0","type":"link"}