{"product_id":"huawei-ascend-p8-max-replacement-battery-38v-4360mah-li-polymer","title":"Huawei Ascend P8 Max Replacement Battery HB3665D2EBC 3.8V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuawei Ascend P8 Max — 3.8V Li-Polymer Replacement Battery (HB3665D2EBC)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 4360mAh Li-Polymer cell that replaces the original HB3665D2EBC battery in the Huawei Ascend P8 Max. It fits the DAV-703L and DAV-713L variants as well. Same dimensions at 130.50 × 63.52 × 3.25 mm, same connector pinout, same BMS handshake the charge IC expects.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP8 Max DAV-703L and DAV-713L compatibility:\u003c\/strong\u003e\n    Both variants share the same battery bay dimensions, connector layout, and charge IC protocol. One cell covers the entire P8 Max line 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 P8 Max platform. The BMS handshake completed on first connection, and the charge IC accepted the cell without triggering protection flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging begins.\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 P8 Max after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe P8 Max fuel gauge IC stores a discharge curve calibrated to the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-versus-capacity relationship of the replacement. The phone reads 25% remaining, but the real open-circuit voltage has already dropped below the modem's minimum rail — so the device shuts off. Running one full unconditioned discharge-charge cycle forces the coulomb counter to relearn the new cell's cliff point. After that cycle, the reported percentage tracks actual capacity correctly.\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-Polymer cells self-discharge in storage. If the replacement cell drops below 2.5V per cell during shipping or shelf time, the BMS enters lockout mode and blocks current flow entirely — the phone shows nothing when you press power. Connect the phone to a wall charger and leave it for 20–30 minutes without pressing any buttons. The charge IC trickle-charges the cell back above the BMS recovery threshold, typically around 2.9V, at which point the BMS releases the lockout and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404172525658,"sku":"BWCS-HUP810SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404172558426,"sku":"BWCS-HUP810SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404172591194,"sku":"BWCS-HUP810SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HUP810SL-1.webp?v=1779369252","url":"https:\/\/batteryweb.com\/products\/huawei-ascend-p8-max-replacement-battery-38v-4360mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}