GSmart T4 Replacement Battery 3.7V 1250mAh 1ICP4/56/74

GSmart T4 Series — 3.7V Li-ion Replacement Battery (1ICP4/56/74)

This 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.

• T4, T4 Lite, and T4 Lite Edition compatibility: 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.
• Bench tested on actual hardware: 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.
• Fuel gauge recalibration on first use: 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.

Sudden shutdown at 20–30% on the GSmart T4 after a cell swap

This 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.

Phone shows incorrect battery percentage after replacement

The 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.