{"product_id":"huawei-c2600-replacement-battery-37v-1100mah-li-ion","title":"Huawei Band 2 Pro Compatible Battery HBL6A 3.7V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei C2600 \/ C2800 Series — 3.7V Li-ion Replacement Battery (HBL6A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1100mAh Li-ion cell replaces the original battery in Huawei C2600, C2606, C2800, C2808, and related Band 2 Pro smartwatch variants. It matches the OEM voltage and physical footprint, including the 54.70 × 34.33 × 7.10mm form factor. Capacity is rated at 4.07Wh — drawn from the product specification, not extrapolated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC2600 \/ C2800 platform fit:\u003c\/strong\u003e\n    These models share the same connector layout, BMS handshake protocol, and voltage rail. The HBL6A cell is recognized by the fuel gauge IC across all listed variants 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 C2600 unit. The BMS accepted the cell without fault flags, and the fuel gauge IC pulled accurate state-of-charge data after one full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use, disable fast charging if the option is available and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before it locks in percentage reporting — skipping this step often triggers erratic percentage jumps in the first few days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the C2600 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits a voltage cliff — a point where internal voltage drops sharply under sensor or display load — before the gauge reaches 0%. The device interprets this as a valid shutdown threshold even though the gauge still shows charge remaining. One full discharge cycle, taken down to the watch's automatic power-off point and then charged to 100%, resets the coulomb counter against the new cell chemistry.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells stored below approximately 2.5V trigger a BMS lockout — the protection circuit opens and blocks current flow to prevent damage from deep discharge. Plugging directly into the charger may appear to do nothing for the first several minutes. Apply a slow charge at the lowest available current source; most BMS circuits will re-initialize once the cell climbs back above 2.8V and the charger should then show a normal charging state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405094813786,"sku":"BWCS-HUC100SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405094846554,"sku":"BWCS-HUC100SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405094879322,"sku":"BWCS-HUC100SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUC100SL-1.webp?v=1779369956","url":"https:\/\/batteryweb.com\/products\/huawei-c2600-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}