{"product_id":"google-pixel-5-replacement-battery-385v-3800mah-li-polymer","title":"Google Pixel 5 GTB1F Replacement Battery 3.85V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGoogle Pixel 5 — 3.85V Li-Polymer Replacement Battery (GTB1F)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3800mAh Li-Polymer battery at 3.85V, built as a direct cell replacement for the Google Pixel 5 smartphone. It matches the original GTB1F specification in voltage, chemistry, and physical footprint — 97.85 × 44.70 × 5.20mm. Swap it in when the original cell no longer holds a usable charge across a full day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePixel 5 cell compatibility:\u003c\/strong\u003e\n    The Pixel 5 uses a single Li-Polymer pouch cell with a five-pin flex connector. Voltage matching at 3.85V nominal is critical — the charge IC on the Pixel 5 mainboard will not complete a charge cycle if the BMS reports an out-of-range cell voltage on first handshake.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Pixel 5 mainboard and confirmed the BMS handshake completed on first boot, charge IC accepted the cell without an error state, and USB-PD fast charge activated after one conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    After installation, disable Adaptive Charging and fast charging in Battery Settings for the first complete discharge-charge cycle. This lets the Pixel 5 fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — skipping this step is why percentage readings drift early.\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 5 shuts down suddenly at 20–30% after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pixel 5 fuel gauge IC retains the discharge curve from the original aged cell. A new 3800mAh cell has a steeper voltage cliff at low state-of-charge than a worn cell does — so the IC underestimates remaining capacity until it recalibrates. Under modem load or screen-on draw, the cell voltage sags below the hardware cutoff threshold before the OS registers empty. One full discharge-charge cycle without fast charging forces the coulomb counter to resync against the new cell's actual curve and eliminates these early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not activating on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle after a cell swap, the Pixel 5 charge IC defaults to a low-current trickle mode while it verifies the new cell's BMS handshake parameters. USB-PD negotiation still occurs at the port level, but the charge IC gates high-current delivery until internal cell checks pass — this is normal behaviour, not a faulty battery or cable. If fast charge does not activate by the second charge cycle, check that the USB-C port is clean and try a certified 18W or higher USB-PD charger. Fast charge should engage fully once the cell reports a stable open-circuit voltage above 3.6V after a complete first cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391895175258,"sku":"BWCS-GPW500SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391895208026,"sku":"BWCS-GPW500SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391895240794,"sku":"BWCS-GPW500SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GPW500SL-1.webp?v=1779142597","url":"https:\/\/batteryweb.com\/products\/google-pixel-5-replacement-battery-385v-3800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}