ZTE F930 Li3710T42P3h483757 Compatible Battery 3.7V 900mAh

ZTE F930 / T930 / P671A80 — 3.7V Li-ion Replacement Battery (Li3710T42P3h483757)

This is a 3.7V, 900mAh Li-ion cell that replaces OEM part Li3710T42P3h483757 in the ZTE F930 and compatible models including the T930, P671A80, and F450. It fits the original battery bay without modification. Voltage and physical dimensions match the ZTE factory spec.

• F930 / T930 / F450 platform compatibility: These models share the same PCB footprint, connector pinout, and 3.7V nominal voltage rail. The BMS handshake uses a standard two-wire thermistor circuit — no proprietary authentication chip — so the replacement cell communicates with the charge IC the same way the original does.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the F930 platform. The BMS accepted charge from the first connection, current tapered correctly at end-of-charge, and the protection circuit triggered at the expected low-voltage cutoff without false trips.
• Fuel gauge recalibration on first use: On first use after installation, run one full discharge-to-charge cycle without interruption before relying on the percentage readout. The fuel gauge IC on the F930 was calibrated to the original cell's discharge curve — one complete cycle against the new cell resets that baseline and stops percentage from reading incorrectly.

Why the F930 reports wrong battery percentage after a cell swap

The F930 uses a fuel gauge IC that tracks charge state by counting coulombs against a stored discharge curve from the original cell. When a new cell goes in, that stored curve no longer matches the actual cell chemistry and impedance. The IC keeps using the old reference, so the percentage shown on screen drifts — often reading full while the phone is closer to half charge. One complete uninterrupted discharge-charge cycle forces the IC to relearn the new cell's curve and brings the percentage readout back into alignment.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops faster than the fuel gauge expects under screen or modem load — the phone hits the hardware voltage cliff before the percentage counter reaches zero. The BMS triggers an emergency cutoff to protect the cell, and the phone shuts down even though the display was showing charge remaining. It is not a defective cell — it is a calibration gap between the fuel gauge's model and the real cell. Run one full discharge cycle down to automatic shutoff, then charge uninterrupted to 100%, and the shutoffs should stop once the gauge has an accurate low-voltage reference point for this cell.