{"product_id":"gsmart-t4-replacement-battery-37v-1250mah-li-ion","title":"GSmart T4 Replacement Battery 3.7V 1250mAh 1ICP4\/56\/74","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGSmart T4 Series — 3.7V Li-ion Replacement Battery (1ICP4\/56\/74)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1250mAh Li-ion replacement battery for the GSmart T4, T4 Lite, and T4 Lite Edition smartphones. It replaces OEM part number 1ICP4\/56\/74 and restores power to devices with degraded or failed original cells. Capacity is rated at 4.63Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eT4, T4 Lite, and T4 Lite Edition compatibility:\u003c\/strong\u003e\n    All three variants share the same 3.7V cell format, connector pinout, and BMS handshake requirement — this single cell fits across the range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the T4 platform. The BMS accepted the cell without error flags, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\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 full discharge-to-charge cycle. This allows the fuel gauge IC to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated register.\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 GSmart T4 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the fuel gauge IC still holds the discharge curve of the old, degraded cell. When the new cell's actual voltage drops under modem or screen load, the IC hasn't recalibrated — it misreads remaining capacity and the phone shuts down before the percentage reaches zero. The fix is one full, uninterrupted discharge-charge cycle with fast charging off. After that cycle, the coulomb counter resets against the new cell's actual curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone shows incorrect battery percentage after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC on the T4 calibrates its percentage readings against a stored model of the previous cell's discharge curve. Swapping in a new cell doesn't automatically reset that model — the IC keeps reading against old data. Percentage jumps, stalls, or reads high until a full cycle forces a recalibration. Drain the phone to automatic shutdown, then charge uninterrupted to 100% with the screen off to complete the reset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392100106330,"sku":"BWCS-GST400SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392100139098,"sku":"BWCS-GST400SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392100171866,"sku":"BWCS-GST400SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GST400SL-1.webp?v=1779143748","url":"https:\/\/batteryweb.com\/products\/gsmart-t4-replacement-battery-37v-1250mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}