ZTE Q507T Li3716T42P3h604852 Compatible Battery 3.8V 1800mAh

ZTE Q507T — 3.8V Li-ion Replacement Battery (Li3716T42P3h604852)

This is a 3.8V, 1800mAh Li-ion cell replacing part number Li3716T42P3h604852 in the ZTE Q507T smartphone. It matches the original voltage rail and connector footprint. Capacity figures are taken directly from product data — 6.84Wh total.

• Q507T cell compatibility: The Q507T uses a fixed 3.8V nominal rail tied to the charge IC and fuel gauge IC. Any replacement cell must match that voltage exactly — a mismatch trips the protection circuit before the phone even boots.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Q507T board. The BMS handshake completed without faults, and the charge IC accepted the cell without triggering a thermal cutoff or voltage rejection error.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one full discharge-charge cycle before normal use. The Q507T's fuel gauge IC was calibrated to the old cell's discharge curve — one complete cycle lets it map the new curve and report accurate percentages.

Sudden shutdown at 20–30% on the Q507T after a cell swap

The Q507T's fuel gauge IC stores a learned discharge curve from the previous cell. When a new cell is installed, the stored curve no longer matches actual cell chemistry. Under modem or screen load, the phone hits a voltage cliff — real cell voltage drops below the cutoff threshold while the gauge still reads 20–30%. The fix is one full discharge to automatic shutdown, followed by a full charge without interruption. After that cycle, the coulomb counter resets and percentage readings stabilise.

Phone feels warm near the battery during the first few charges

A new cell typically has higher internal impedance than a broken-in cell. During the first two or three charge cycles, the Q507T's charge IC pushes current into that higher-impedance cell, which converts more energy to heat than usual. This is normal and decreases as the cell conditions. If the device becomes hot enough to be uncomfortable to hold, disconnect the charger and let it cool to room temperature before resuming — keep charging current low for the first cycle by using a standard 5V/1A charger rather than a fast-charge adapter.