{"product_id":"t-mobile-g2-replacement-battery-37v-1350mah-li-ion","title":"T-Mobile G2 Replacement Battery BA S450 3.7V 1350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eT-Mobile G2 — 3.7V Li-ion Replacement Battery (BA S450)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1350mAh Li-ion battery for the T-Mobile G2 smartphone. It replaces OEM part numbers BA S450, 35H00140-00M, and 35H00140-01M. If your G2 is shutting down unexpectedly or no longer holding a charge, this cell is a direct swap for the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT-Mobile G2 compatibility:\u003c\/strong\u003e\n    The G2 uses a standardised 3.7V single-cell Li-ion pack with a fixed connector pinout. All three OEM part numbers above share the same voltage rail and BMS handshake, so this replacement works across the full G2 production run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through charge and discharge cycles on the G2 platform. The BMS accepted the cell without fault codes, and the fuel gauge IC initialised correctly after one full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, disable any fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state — skipping this step often causes erratic percentage readings.\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 G2 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe G2's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage profile of the replacement. Under modem or screen load, voltage drops faster than the gauge expects, and the phone cuts power before the displayed percentage reaches zero. One full discharge-charge cycle at standard rate forces the coulomb counter to re-anchor to the new cell. After that cycle, shutdowns below 25% typically stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eG2 not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells discharged below 2.5V trigger a BMS lockout to prevent cell damage. A G2 battery stored flat for months can sit below this threshold, leaving the phone completely unresponsive. Connect the phone to a wall charger — not a USB port — and leave it for 20–30 minutes without attempting to power on. The charge IC will trickle current into the cell until it clears the BMS lockout threshold, typically around 2.9V, at which point normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405104676954,"sku":"BWCS-HT7272XL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405104709722,"sku":"BWCS-HT7272XL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405104742490,"sku":"BWCS-HT7272XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HT7272XL-1.webp?v=1779369955","url":"https:\/\/batteryweb.com\/products\/t-mobile-g2-replacement-battery-37v-1350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}