{"product_id":"apple-iphone-8-replacement-battery-382v-1950mah-li-polymer","title":"Apple iPhone 8 Li-Polymer Replacement Battery 616-00357 3.82V 1950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPhone 8 — 3.82V Li-Polymer Replacement Battery (616-00357)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.82V, 1950mAh Li-Polymer cell that replaces the original battery in the Apple iPhone 8. It fits models A1863, MQ6K2LL\/A, MQ7H2ZP\/A, and related SKUs listed under OEM part numbers 616-00357 and 616-00358. When the original cell degrades past Apple's 80% capacity threshold, iOS throttles CPU performance — swapping the cell restores full clock speed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eiPhone 8 compatibility:\u003c\/strong\u003e\n    All A1863 and MQ-series iPhone 8 variants use the same 3.82V battery connector, BMS handshake protocol, and fuel gauge IC pairing. One cell fits every regional variant in this lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on an iPhone 8 logic board. The BMS accepted the charge curve without faults, and the fuel gauge IC began tracking state-of-charge correctly after one complete cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle fuel gauge reset:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge down to auto-shutdown, then charge uninterrupted to 100%. This gives the coulomb counter a clean baseline against the new cell's discharge curve before high-current charging begins.\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 a replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe iPhone 8's fuel gauge IC stores a learned discharge curve from the original cell. A fresh cell has lower internal impedance, so the voltage-versus-capacity curve shifts. When the gauge predicts a voltage cliff using the old curve, it triggers an early shutdown even though charge remains. One full discharge-to-shutdown and uninterrupted recharge resets the coulomb counter and eliminates false cutoffs. After that cycle, reported percentage tracks actual cell state accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first cycle after installation, the iPhone 8 charge IC can default to standard 5W charging while it negotiates with the new cell's BMS. This is normal behaviour — the IC runs a conservative handshake on an uncalibrated cell. Complete one standard charge cycle to 100% first. Fast charging via USB-PD typically re-enables automatically from the second cycle onward once the BMS reports a valid state-of-health above 3.6V resting voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392025264218,"sku":"BWCS-IPH800XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392025296986,"sku":"BWCS-IPH800XL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392025329754,"sku":"BWCS-IPH800XL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPH800XL-1.webp?v=1779142944","url":"https:\/\/batteryweb.com\/products\/apple-iphone-8-replacement-battery-382v-1950mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}