{"product_id":"google-pixel-8-replacement-battery-389v-4500mah-li-polymer","title":"Google Pixel 8 GS35E Replacement Battery 3.89V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGoogle Pixel 8 \/ GKWS6 \/ G9BQD — 3.89V Li-Polymer Replacement Battery (GS35E)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.89V 4500mAh lithium-polymer cell is a direct replacement for the battery in the Google Pixel 8, GKWS6, and G9BQD handsets. It replaces OEM part numbers GS35E and G949-00574-01. Fit this battery when the original cell has degraded, causing shortened charge holds, erratic percentage readings, or unexpected shutdowns.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePixel 8 \/ GKWS6 \/ G9BQD platform fit:\u003c\/strong\u003e\n    All three model designations share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The 92.50 × 45.80 × 6.00mm cell geometry matches the original cavity with no modification required.\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 Pixel 8 hardware. The BMS communicated correctly with the device's charge IC and fuel gauge. No charge rejection or handshake errors were observed across USB-PD sessions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current fast charging begins pushing 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 Pixel 8 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pixel 8 uses a coulomb-counter fuel gauge IC that tracks charge state against a learned model of the original cell's discharge curve. When a new cell goes in, that learned model no longer matches actual cell behaviour. The gauge reads an offset — sometimes by 10–20% — until it relearns the curve. One full discharge from 100% to automatic shutdown, followed by a complete charge, resets the calibration baseline. After that cycle, percentage readings stabilise.\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 when the modem, display, or camera draws a high-current spike and the cell voltage drops below the BMS cutoff threshold momentarily — even though the gauge still shows 20–30%. It is a voltage-cliff symptom, not a capacity fault. New lithium-polymer cells can show steeper voltage sag under load until the electrolyte fully wets the electrode stack after a few cycles. If shutdowns persist beyond three full cycles, check that the battery connector is fully seated — a partial contact increases internal resistance and worsens voltage sag under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391798345818,"sku":"BWCS-GPW800SL-1","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391798378586,"sku":"BWCS-GPW800SL-2","price":53.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391798411354,"sku":"BWCS-GPW800SL-3","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GPW800SL-1.webp?v=1779142181","url":"https:\/\/batteryweb.com\/products\/google-pixel-8-replacement-battery-389v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}