TCL A990 CAB31P0000C1 Compatible Battery 3.7V 1500mAh

TCL A990 / C990 Series — 3.7V Li-ion Replacement Battery (CAB31P0000C1)

This is a 3.7V, 1500mAh Li-ion cell replacing OEM part CAB31P0000C1 in the TCL A990 and compatible models. It fits the A990, C990, A919, and A966 smartphones — all share the same physical footprint and voltage rail. Capacity figure comes from product specification: 1500mAh / 5.55Wh.

• A990 / C990 platform compatibility: These models run the same 3.7V battery rail with an identical connector pitch and BMS handshake protocol. Swapping between these variants does not require firmware changes — the charge IC reads cell chemistry the same way across the series.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the A990 board. The BMS accepted the cell without fault flags, and the charge IC ramped to CC/CV without triggering thermal cutoff or protocol rejection.
• Fuel gauge recalibration tip: On first use after installation, disable fast charging for one full discharge-charge cycle. The fuel gauge IC calibrates its coulomb counter against the new cell's discharge curve — running fast charge before that calibration pushes high current into an uncalibrated cell and can skew percentage readings for weeks.

Sudden shutdown at 20–30% on a freshly swapped cell

A new cell in an A990 can hit a voltage cliff under load before the fuel gauge reports critical. The modem radio and display draw sharp current spikes — if the cell voltage sags below roughly 3.4V under that load, the BMS trips and the phone cuts off, even though the percentage shown was still 20–30%. This is a calibration gap, not a faulty battery. Run one full charge-discharge cycle without fast charging to let the coulomb counter map the actual discharge curve of the new cell. After that cycle, the reported percentage will track real cell voltage far more accurately.

Phone will not power on after the battery sat discharged in storage

Li-ion cells stored below approximately 2.5V per cell trigger a BMS lockout — a protection circuit that cuts output to prevent further damage to the cell. The phone will not respond to the power button and may show no charging indicator for the first 10–20 minutes on the charger. This is the BMS trickle-recovery phase, not a dead battery. Leave the phone on a 5V/1A charger — not a fast charger — for 30 minutes before attempting to power on. If the cell recovers above 3.0V, the BMS unlocks and normal charging resumes.