{"product_id":"redmi-10c-replacement-battery-387v-4900mah-li-polymer","title":"Redmi 10C Replacement Battery BN5G 3.87V 4900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRedmi 10C \/ 10A Series — 3.87V Li-Polymer Replacement Battery (BN5G)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BN5G is the OEM-matched Li-Polymer cell for the Redmi 10C and 10A smartphones, including variants 220333QAG and 220333QBI. It runs at 3.87V with a 4900mAh (18.96Wh) capacity. Fit this when the original cell no longer holds charge, swells, or fails to power the device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e10C and 10A platform compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — the BN5G part number covers the full variant range because the fuel gauge IC and charge controller are common across these SKUs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled the BN5G through full charge and load discharge on a 10C unit. The BMS accepted the charge controller handshake on the first cycle, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast-charge protocol:\u003c\/strong\u003e\n    On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before the charge IC pushes higher current 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 replacement BN5G cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff failure, not a capacity fault. The phone's PMIC monitors cell voltage under load — modem transmit bursts and display brightness spikes draw current fast enough to pull the cell voltage below the shutdown threshold even when the fuel gauge still reads 20–30%. A freshly installed cell that hasn't completed a calibration cycle will hit this because the coulomb counter is still mapped to the old cell's impedance curve. Run one full discharge to auto-off, then charge uninterrupted to 100% — the fuel gauge recalibrates and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the BN5G sat discharged in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells dropped below roughly 2.5V per cell trigger a BMS lockout — the protection circuit opens to prevent an unsafe charge into a deeply discharged cell. The phone won't respond to the power button and may show nothing on screen even with a cable attached. Connect to a 5V\/1A charger — not a fast charger — and leave it for 20–30 minutes without pressing anything. The BMS re-initialises at a trickle rate first; once cell voltage climbs above the recovery threshold (around 3.0V), normal charging resumes and the phone will boot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391841894490,"sku":"BWCS-MUR220SL-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391841927258,"sku":"BWCS-MUR220SL-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391841960026,"sku":"BWCS-MUR220SL-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUR220SL-1.webp?v=1779142367","url":"https:\/\/batteryweb.com\/products\/redmi-10c-replacement-battery-387v-4900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}