{"product_id":"xiaomi-2015617-replacement-battery-38v-3900mah-li-polymer","title":"Xiaomi BM46 Redmi Note 3 Replacement Battery 3.8V 3900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Redmi Note 3 — 3.8V Li-Polymer Replacement Battery (BM46)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3900mAh, 3.8V Li-Polymer replacement battery for the Xiaomi Redmi Note 3, including the 2015617, 2015611, and Dual SIM variants. It slots into the same bay as the original BM46 cell and connects to the same charge IC and fuel gauge circuit. Capacity is 3900mAh (14.82Wh), matching the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRedmi Note 3 variant coverage:\u003c\/strong\u003e\n    The 2015617, 2015611, standard, and Dual SIM models all use the same BM46 footprint, connector pinout, and BMS handshake. One cell fits all four because the charge IC and fuel gauge IC are identical across the production run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the Redmi Note 3 charge circuit and confirmed the BMS accepts the charge IC handshake on both standard and fast-charge protocols. The protection circuit trips correctly at the low-voltage cutoff threshold.\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 for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes amperage into an uncalibrated coulomb counter.\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 Redmi Note 3 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a different internal resistance profile than the worn cell the fuel gauge IC was calibrated against. Under high-draw loads — modem handshake, screen at full brightness, GPS active — the cell voltage sags faster than the fuel gauge expects. The IC reads 25% but the actual terminal voltage drops below the protection threshold, and the BMS cuts power to prevent cell damage. One full discharge to near-zero followed by a slow charge cycle forces the fuel gauge to re-learn the actual capacity curve and clears the mismatch.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone stays dark after the replacement battery sat in storage before install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells self-discharge during storage. If the cell voltage drops below approximately 2.5V per cell, the BMS enters lockout mode and blocks current flow to protect against cell reversal damage. The phone will not respond to the power button and may not show a charging indicator. Connect the phone to a low-current USB charger — 5V\/500mA — and leave it for 20–30 minutes without pressing any buttons. Once the BMS registers voltage above the recovery threshold, the charge IC takes over and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392112492634,"sku":"BWCS-MUM460XL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392112525402,"sku":"BWCS-MUM460XL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392112558170,"sku":"BWCS-MUM460XL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUM460XL-1.webp?v=1779143848","url":"https:\/\/batteryweb.com\/products\/xiaomi-2015617-replacement-battery-38v-3900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}