{"product_id":"poco-m3-pro-5g-replacement-battery-385v-4900mah-li-polymer","title":"Poco M3 Pro 5G Replacement Battery 3.85V 4900mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePoco M3 Pro 5G (M2103K19PI \/ M2103K19G) — 3.85V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 4900mAh Li-Polymer replacement battery for the Poco M3 Pro 5G smartphone. It fits models M2103K19PI, M2103K19PG, and M2103K19G. Swap it in when the original cell has degraded and the phone can no longer hold a useful charge through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM3 Pro 5G model variants:\u003c\/strong\u003e\n    The M2103K19PI, M2103K19PG, and M2103K19G share the same battery footprint, connector pinout, and BMS handshake protocol — this cell works across all three without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Poco M3 Pro 5G unit and confirmed the BMS accepted the connection, charge IC initiated correctly, and the MIUI battery indicator climbed from 0% without fault flags or charge interruptions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging is applied to 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\"\u003eSudden shutdown at 20–30% on the Poco M3 Pro 5G\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe M3 Pro 5G runs a Dimensity 700 5G modem alongside a 90Hz display — both draw hard when active simultaneously. A degraded or freshly installed uncalibrated cell can hit a voltage cliff under that combined load even while the OS still reports 20–30% remaining. The fuel gauge IC is reading a stored estimate, not live cell voltage, so the phone shuts down before the counter reaches zero. One full discharge-charge cycle at standard rate corrects the estimate and eliminates most unannounced shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering on the first cycle after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a battery replacement, the charge IC on the M3 Pro 5G may default to trickle or standard 5V charging on the first connection — it does not immediately negotiate the 18W fast-charge protocol with the new cell's BMS. This is a deliberate safety step, not a fault with the charger or cable. Fully discharge the phone to auto-off, then reconnect the charger. Fast-charge handshake typically resumes from the second cycle onward once the BMS has completed one full charge-discharge pass.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391883378778,"sku":"BWCS-MUN100SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391883411546,"sku":"BWCS-MUN100SL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391883444314,"sku":"BWCS-MUN100SL-3","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MUN100SL-1.webp?v=1779142479","url":"https:\/\/batteryweb.com\/products\/poco-m3-pro-5g-replacement-battery-385v-4900mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}