{"product_id":"redmi-5-plus-replacement-battery-385v-3900mah-li-polymer","title":"Redmi 5 Plus BN44 Compatible Battery 3.85V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRedmi 5 Plus — 3.85V Li-Polymer Replacement Battery (BN44)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3900mAh Li-Polymer battery for the Redmi 5 Plus smartphone. It replaces OEM part BN44 and fits the MEG7 and MEE7 variants, including the Dual SIM models. Voltage is 3.85V, with a total energy rating of 15.02Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e5 Plus variant coverage:\u003c\/strong\u003e\n    The MEG7, MEE7, and Dual SIM builds share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell fits all listed variants without hardware 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 5 Plus unit. The BMS accepted the cell without fault codes, and the charge IC ramped current correctly through CC and CV phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge recalibration:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run 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 pushes current into an uncalibrated state.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Redmi 5 Plus reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores a discharge model based on the old cell's internal resistance and capacity curve. When a new cell goes in, the IC is still reading against stale calibration data. The percentage shown can lag or jump by 5–15% until the IC re-learns the new curve. One full discharge to shutdown followed by a complete charge cycle forces the coulomb counter to reset against the new cell.\u003c\/p\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 is a voltage cliff symptom. Under modem or display load, the uncalibrated cell voltage drops sharply below the threshold the OS expects at that reported percentage. The BMS interprets this as a low-voltage fault and cuts power before the fuel gauge catches up. The fix is the same full recalibration cycle — run the phone down to automatic shutdown, then charge uninterrupted to 100% without fast charging enabled. After one clean cycle, the coulomb counter anchors both endpoints and the cliff disappears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392031850586,"sku":"BWCS-MUR520SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392031883354,"sku":"BWCS-MUR520SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392031916122,"sku":"BWCS-MUR520SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUR520SL-1.webp?v=1779143030","url":"https:\/\/batteryweb.com\/products\/redmi-5-plus-replacement-battery-385v-3900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}