{"product_id":"xiaomi-redmi-note-11t-pro-replacement-battery-387v-4300mah-li-polymer","title":"Xiaomi BP4C Redmi Note 11T Pro+ Replacement Battery 3.87V 4300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Redmi Note 11T Pro+ — 3.87V Li-Polymer Replacement Battery (BP4C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BP4C is a 3.87V, 4300mAh (16.64Wh) lithium-polymer cell for the Xiaomi Redmi Note 11T Pro+. It fits the mid-range Android variant with the BP4C OEM designation. This battery restores full charge capacity when the original cell has degraded or failed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRedmi Note 11T Pro+ fit:\u003c\/strong\u003e\n    The BP4C connector pinout and BMS handshake match the Note 11T Pro+ charge IC. The physical dimensions — 89.00 × 62.75 × 4.90mm — align with the original cell envelope. Fitting a cell outside these tolerances risks flex cable strain on the charge port.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the BP4C through charge and discharge cycles on the Note 11T Pro+ mainboard. The BMS communicated correctly with the fuel gauge IC, and the charge IC accepted the cell without fault flags on the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge hold-off:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to recalibrate against the new cell's discharge curve before high-current fast charging pushes current into an uncalibrated cell.\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 Note 11T Pro+ reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Note 11T Pro+ uses a coulomb counter in its fuel gauge IC. That counter was trained on the discharge curve of the original aged cell. A new cell with a different internal resistance profile causes the IC to misread state of charge, especially below 30% and above 85%. The fix is one full discharge to approximately 3.0V under normal load, followed by an uninterrupted charge to 100%. After that cycle, the fuel gauge recalibrates against the new cell's actual curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% charge remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff problem, not a capacity problem. Under high-draw loads — active modem, high screen brightness, GPS — the cell voltage drops sharply when the coulomb counter still reads 20–25% remaining. The phone's under-voltage protection trips at approximately 3.4V and shuts down before the displayed percentage reaches zero. Running one full calibration cycle corrects the fuel gauge mapping and eliminates most premature shutdowns. If shutdowns continue after two calibration cycles, verify the cell seated fully and no flex cable is pinched near the battery connector.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391842549850,"sku":"BWCS-MUN110SL-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391842582618,"sku":"BWCS-MUN110SL-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391842615386,"sku":"BWCS-MUN110SL-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUN110SL-1.webp?v=1779142367","url":"https:\/\/batteryweb.com\/products\/xiaomi-redmi-note-11t-pro-replacement-battery-387v-4300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}