{"product_id":"apple-iphone-x-replacement-battery-382v-3150mah-li-polymer","title":"Apple iPhone X Replacement Battery 616-00351 3150mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPhone X — 3.82V Li-Polymer Replacement Battery (616-00351)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.82V, 3150mAh (12.03Wh) Li-Polymer battery is a direct cell replacement for the Apple iPhone X. It fits all iPhone X variants, including MQA62LL\/A, MQA92LL\/A, and MQA82LL\/A. The OEM part number is 616-00351, matching Apple's original specification for this device.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eiPhone X compatibility:\u003c\/strong\u003e\n    All iPhone X variants share the same battery bay geometry, connector pinout, and BMS handshake protocol. The 616-00351 cell format and voltage rail are consistent across every regional SKU of this model.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on an iPhone X unit. The BMS accepted the cell without error flags, fuel gauge IC synced after one full cycle, and charge IC negotiation completed normally under both standard and fast charge protocols.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fast charge tip:\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 high-current fast charging pushes current into 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\"\u003eWhy the iPhone X reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe iPhone X uses a coulomb counter inside the power management IC to track state of charge. That counter was calibrated to the original cell's discharge curve over hundreds of cycles. A new cell has a different internal resistance profile, so the counter's reference points are off from the start. The fix is one full discharge to automatic shutoff followed by a complete charge to 100% — this resets the fuel gauge's anchor points against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% remaining on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still references the old cell's voltage-to-capacity curve. At high load — modem transmitting, screen at full brightness — the new cell's voltage briefly dips below the shutdown threshold even though capacity remains. The power management IC reads that as a critically low cell and cuts power. Run one full calibration cycle first, then check if shutdowns persist; if they do, verify the battery connector is fully seated, as a loose contact raises contact resistance and amplifies voltage sag under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391884558426,"sku":"BWCS-IPH820XL-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391884591194,"sku":"BWCS-IPH820XL-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391884623962,"sku":"BWCS-IPH820XL-3","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPH820XL-1.webp?v=1779142541","url":"https:\/\/batteryweb.com\/products\/apple-iphone-x-replacement-battery-382v-3150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}