{"product_id":"infinix-infinix-smart-replacement-battery-37v-2650mah-li-polymer","title":"Infinix Smart BL-AW878 Replacement Battery 3.7V 2650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eInfinix Smart X5010 — 3.7V Li-Polymer Replacement Battery (BL-AW878)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BL-AW878 is a 3.7V, 2650mAh lithium-polymer cell that fits the Infinix Smart (X5010). It restores power to a phone that no longer holds charge, drains overnight, or shuts off unexpectedly. Capacity and voltage match the original Infinix specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInfinix Smart X5010 fitment:\u003c\/strong\u003e\n    The X5010 uses a fixed rear-cover design with a direct contact connector and a BMS that handshakes with the charge IC over a single thermistor line. This cell matches that connector pinout, voltage rail, and thermistor resistance profile.\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 X5010 platform. The BMS accepted the cell without fault codes, and the charge IC completed a full constant-current to constant-voltage transition at 4.2V with no cutoff interruptions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and let the phone complete one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins — skipping this step causes percentage jumps and premature low-battery alerts.\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 replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC is still calibrated to the old cell's voltage curve. The new cell hits a voltage cliff under modem or display load before the gauge registers empty — the phone reads 25% but the cell voltage has already collapsed below the BMS cutoff threshold. One complete discharge cycle — draining to automatic shutdown, then charging fully — forces the coulomb counter to reset against the new cell's actual curve. After that cycle, the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-polymer cells in storage self-discharge over weeks. If the cell drops below 2.5V, the BMS enters a lockout state and will not accept a normal charge request. Plug the phone into a wall adapter — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC will deliver a trickle current to bring the cell above the BMS wake threshold, typically 2.8V, at which point the phone will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391987810394,"sku":"BWCS-FNX501SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391987843162,"sku":"BWCS-FNX501SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391987875930,"sku":"BWCS-FNX501SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNX501SL-1.webp?v=1779142762","url":"https:\/\/batteryweb.com\/products\/infinix-infinix-smart-replacement-battery-37v-2650mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}