{"product_id":"apple-a3084-replacement-battery-38v-4700mah-li-polymer","title":"Apple iPhone 13 Pro Max A3084 Replacement Battery 3.8V 4700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple iPhone 13 Pro Max — 3.8V Li-Polymer Replacement Battery (102CS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 4700mAh Li-Polymer cell replaces the original battery in the iPhone 13 Pro Max (A3084, A3295, A3296, A3297). It matches the OEM dimensions at 95.00 × 66.00 × 5.50mm and connects to the existing logic board flex cable without modification. Voltage and capacity figures come directly from the product specification, not estimated values.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eiPhone 13 Pro Max platform fit:\u003c\/strong\u003e\n    The A3084, A3295, A3296, and A3297 variants share the same battery bay geometry, flex connector pinout, and BMS handshake protocol — all are regional SKUs of the same 13 Pro Max hardware, so one cell covers the full range.\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 a 13 Pro Max logic board. The BMS accepted the connection without a fault flag, and the charge IC ramped to full current after the first complete cycle completed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This gives the fuel gauge IC a clean baseline discharge curve against the new cell before high-current charging pushes current into an uncalibrated state.\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 13 Pro Max reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe iPhone uses a coulomb counter and a learned discharge curve stored from the previous cell. When you install a new cell, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The fuel gauge IC keeps reading against the old data until it recalibrates. One complete discharge below 10% followed by a full charge to 100% at standard rate resets the curve and brings the percentage display back into alignment.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under load — modem bursts during a call or cellular handoff pull current the uncalibrated fuel gauge didn't anticipate. The system reads 25% but the cell voltage has already fallen below the safe threshold, triggering an immediate shutdown. It is not a fault with the cell itself — it is the gauge IC firing a cutoff based on stale data. Run two full discharge-charge cycles at standard rate, and the shutdowns will stop once the IC maps the real voltage cliff at the correct state-of-charge point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391769149530,"sku":"BWCS-IPH162SL-1","price":375.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391769182298,"sku":"BWCS-IPH162SL-2","price":449.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391769215066,"sku":"BWCS-IPH162SL-3","price":504.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-IPH162SL_1.webp?v=1779141870","url":"https:\/\/batteryweb.com\/products\/apple-a3084-replacement-battery-38v-4700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}