{"product_id":"motorola-xt2347-replacement-battery-391v-4850mah-li-polymer","title":"Motorola QB50 Replacement Battery XT2347 3.91V 4850mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola Moto G84 5G \/ XT2347 — 3.91V Li-Polymer Replacement Battery (QB50)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4850mAh Li-Polymer cell at 3.91V, built to replace the original QB50 battery in the Motorola XT2347 and Moto G84 5G. The original cell degrades over charge cycles and loses the ability to sustain voltage under screen and modem load. This replacement restores full charge capacity to the XT2347 platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXT2347 and Moto G84 5G fit:\u003c\/strong\u003e\n    Both model designations share the same battery bay geometry, connector pinout, and BMS handshake protocol. The QB50 part number covers both — there is no separate variant between the two.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on XT2347 hardware. The BMS accepted the cell without error flags, and the fuel gauge IC tracked state of charge without erratic jumps once calibration completed.\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-to-charge cycle. This lets the fuel gauge IC build a discharge curve against the new cell before high-current charging begins on 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 Moto G84 5G after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XT2347 shuts down mid-use because the modem and display together draw enough current to collapse cell voltage below the BMS cutoff threshold — even when the fuel gauge still reads 20–30%. This happens because the fuel gauge IC is still calibrated to the old cell's discharge curve. The new cell hits its voltage floor faster under load than the old curve predicts. One full discharge-charge cycle with fast charging disabled lets the coulomb counter recalibrate, and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering on first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter installing a new cell, the charge IC on the Moto G84 5G may default to standard 5V charging and refuse to negotiate the higher USB-PD voltage on the first cycle. This is a protective behaviour — the charge IC withholds high-current negotiation until it has confirmed the new BMS is responding correctly. Plug into the original Motorola charger and let the first charge complete at standard rate. On the second cycle, USB-PD fast charge should negotiate normally at the expected voltage handshake.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391790973018,"sku":"BWCS-MXT243SL-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391791005786,"sku":"BWCS-MXT243SL-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391791038554,"sku":"BWCS-MXT243SL-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MXT243SL-1.webp?v=1779142036","url":"https:\/\/batteryweb.com\/products\/motorola-xt2347-replacement-battery-391v-4850mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}