{"product_id":"apple-iphone-6s-plus-replacement-battery-38v-3000mah-li-polymer","title":"Apple iPhone 6s Plus 3000mAh Replacement Battery 616-00042","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPhone 6s Plus — 3.8V Li-Polymer Replacement Battery (616-00042)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3000mAh (11.4Wh) lithium-polymer cell replaces the OEM battery in the iPhone 6s Plus, including models A1634, A1690, and A1699. It matches the original cell's dimensions at 119.00 × 47.65 × 4.00mm and uses the same connector and BMS handshake as the factory unit. Swap it in when the original cell can no longer hold charge through a normal day of use.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e6s Plus platform fit:\u003c\/strong\u003e\n    The A1634, A1690, and A1699 variants all share the same battery bay geometry, voltage rail, and BMS communication protocol. One cell covers the full 6s Plus lineup — no connector adapters or firmware workarounds needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell in a 6s Plus unit and logged the BMS handshake across charge and discharge. The protection IC correctly flagged over-voltage at 4.35V and low-voltage cutoff activated before the cell dropped below the safe floor.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after installation:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one full discharge-charge cycle at standard current. This lets the iPhone's fuel gauge IC map its coulomb counter against the new cell's actual 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 the 6s Plus after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still running a calibration curve built from the old, degraded cell. The new cell has a steeper voltage cliff under modem and display load than the iOS power manager expects. At high draw — LTE handoff, GPS burst, screen at full brightness — cell voltage drops momentarily below the shutdown threshold even though the reported percentage looks healthy. One full discharge to 1% and a complete charge to 100% at standard current resets the coulomb counter and eliminates most of these shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eiPhone 6s Plus showing incorrect battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe iOS fuel gauge IC does not automatically recalibrate when a new cell is installed — it carries over the learned curve from the previous battery. This mismatch causes percentage readings to jump, stall, or drop suddenly in the lower third of the charge range. Force a recalibration by draining the phone until it shuts down automatically, then charging uninterrupted to 100% without interruption. After one complete cycle, the coulomb counter anchors to the new cell's actual capacity and percentage reporting stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392076906586,"sku":"BWCS-IPH612XL-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392076939354,"sku":"BWCS-IPH612XL-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392076972122,"sku":"BWCS-IPH612XL-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPH612XL-1.webp?v=1779143621","url":"https:\/\/batteryweb.com\/products\/apple-iphone-6s-plus-replacement-battery-38v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}