{"product_id":"apple-iphone-15-replacement-battery-385v-3500mah-li-polymer","title":"Apple iPhone 15 Replacement Battery A3018 3.85V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPhone 15 — 3.85V Li-Polymer Replacement Battery (A3018)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3500mAh Li-Polymer replacement battery for the Apple iPhone 15. It fits the iPhone 15 only — not the Plus, Pro, or Pro Max. Voltage and capacity match Apple's OEM specification for this model.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eiPhone 15 fitment:\u003c\/strong\u003e\n    The iPhone 15 uses a specific connector orientation and BMS handshake protocol tied to the A3018 cell. Other iPhone 15 variants run different voltage rails and fuel gauge calibration — this cell is matched to the base iPhone 15 board only.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge cycle on an iPhone 15 unit. The BMS accepted the charge handshake without error, and the charge IC stepped through trickle, constant-current, and constant-voltage phases normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one complete discharge-charge cycle at standard 5W. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes 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 cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a discharge curve the iPhone's fuel gauge IC has never seen. Under high-current load — 5G modem switching, ProRAW processing, or screen at full brightness — the cell voltage can dip below the BMS cutoff threshold even when the reported percentage looks safe. The phone reads 25% but the instantaneous voltage under load drops below 3.4V, triggering a hard shutdown. Run one full discharge to 1–2% followed by a complete charge to 100% to let the coulomb counter recalibrate against actual cell capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not accepted on first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the iPhone 15's charge IC may not negotiate full USB-PD fast charge with a replacement cell — it defaults to a lower current rate while the BMS and fuel gauge IC finish initial calibration. This is not a fault with the adapter or the cell. Use a standard 5W charge for the first full cycle, then reconnect a USB-PD adapter. Fast charge should negotiate normally from the second cycle onward at the expected 18W input rate.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391783665754,"sku":"BWCS-IPH150SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391783698522,"sku":"BWCS-IPH150SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391783731290,"sku":"BWCS-IPH150SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPH150SL-1.webp?v=1779141908","url":"https:\/\/batteryweb.com\/products\/apple-iphone-15-replacement-battery-385v-3500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}