{"product_id":"xiaomi-redmi-10x-pro-replacement-battery-385v-4500mah-li-polymer","title":"Xiaomi Redmi 10X Pro BM4T Replacement Battery 3.85V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eXiaomi Redmi 10X Pro Series — 3.85V Li-Polymer Replacement Battery (BM4T)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BM4T is a 3.85V, 4500mAh Li-Polymer cell for the Xiaomi Redmi 10X Pro, 10X Pro 5G, and M2004J7BC. It replaces a degraded original when the phone no longer holds charge or shuts down unexpectedly. Capacity is 4500mAh (17.33Wh), matching the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRedmi 10X Pro and 10X Pro 5G compatibility:\u003c\/strong\u003e\n    Both variants use the same BM4T footprint, connector pinout, and BMS handshake protocol. The 5G modem draws higher peak current, so the cell must pass the same high-drain BMS negotiation as the LTE version — this unit does.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on a Redmi 10X Pro unit. The BMS accepted the cell on first connection, charge IC entered CC\/CV mode normally, and the coulomb counter began tracking without error 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 complete discharge-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\"\u003eSudden shutdown at 20–30% on the Redmi 10X Pro after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still calibrated to the old cell's voltage curve. The new cell reaches a voltage cliff — where voltage drops steeply under modem or display load — at a different state of charge than the IC expects. The phone interprets a voltage dip below ~3.5V as imminent shutdown and cuts power, even though percentage still shows 20–30%. One full discharge to 0% followed by an uninterrupted charge to 100% resets the coulomb counter and resolves this.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD or Xiaomi fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn a fresh cell, the BMS may not complete the handshake required for fast charge protocols on the first cycle. The charge IC defaults to standard 5V input until it receives a valid BMS response confirming cell state. This is normal behaviour — not a fault with the battery or the charger. Complete one full standard-rate charge cycle first, then fast charging activates on subsequent sessions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391948554330,"sku":"BWCS-MUM120SL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391948587098,"sku":"BWCS-MUM120SL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391948619866,"sku":"BWCS-MUM120SL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUM120SL-1.webp?v=1779142720","url":"https:\/\/batteryweb.com\/products\/xiaomi-redmi-10x-pro-replacement-battery-385v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}