{"product_id":"huawei-band-3-pro-replacement-battery-382v-100mah-li-polymer","title":"Huawei Band 3 Pro Compatible Battery HB351329ECW 3.82V 100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Band 3 Pro — 3.82V Li-Polymer Replacement Battery (HB351329ECW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.82V, 100mAh Li-Polymer cell replacing part number HB351329ECW in the Huawei Band 3 Pro fitness tracker. The Band 3 Pro is a slim wrist-worn device with continuous heart rate monitoring, GPS, and sleep tracking. Dimensions are 27.40 × 12.00 × 3.20mm — a tight fit, so exact sizing matters.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBand 3 Pro platform fit:\u003c\/strong\u003e\n    The Band 3 Pro runs a single-cell Li-Polymer architecture at 3.82V nominal. The BMS on this platform reads cell impedance at startup, so the replacement cell must match the original voltage rating exactly — any deviation triggers a low-battery fault before the fuel gauge can calibrate.\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 Band 3 Pro platform. The BMS accepted the cell without fault flags, and the fuel gauge stepped through charge states normally from near-zero to full.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap charging on the Band 3 Pro:\u003c\/strong\u003e\n    After fitting this cell, place the watch on its magnetic charger immediately and charge to 100% before use. The Band 3 Pro fuel gauge IC loses its reference point when the original cell is removed. Without a full charge cycle from near-zero, the gauge cannot recalibrate 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 Band 3 Pro fuel gauge reads incorrectly after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Band 3 Pro uses a coulomb-counting fuel gauge IC that tracks charge by measuring current flow over time. When the original cell is disconnected, the IC loses its accumulated reference data — it has no baseline to work from. The new cell arrives at a partial state of charge, which the gauge cannot interpret without a calibration cycle. One full charge from near-zero resets the counter and restores accurate percentage readings.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWatch not pairing with the Huawei Health app after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving power during a battery swap terminates any active BLE session between the Band 3 Pro and the paired phone. The watch generates a new session token on next boot, which the phone's Bluetooth stack does not recognise automatically. Open the Huawei Health app, go to device settings, remove the Band 3 Pro from paired devices, then re-pair from scratch. The watch must show a stable charge above 10% before pairing will complete reliably.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416163713114,"sku":"BWCS-HUP310SH-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416163745882,"sku":"BWCS-HUP310SH-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416163778650,"sku":"BWCS-HUP310SH-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP310SH-1.webp?v=1779760505","url":"https:\/\/batteryweb.com\/products\/huawei-band-3-pro-replacement-battery-382v-100mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}