Meitu V4 Replacement Battery MA4013 3.8V 2650mAh

Meitu V4 / V4S — 3.8V Li-Polymer Replacement Battery (MA4013)

This is a 3.8V, 2650mAh (10.07Wh) Li-Polymer cell for the Meitu V4 and V4S smartphones. It replaces the original MA4013 battery when the existing cell has degraded, swells, or can no longer hold a usable charge. Dimensions are 69.70 × 52.80 × 4.40 mm — measure your existing cell before ordering if the chassis has been repaired previously.

• V4 and V4S compatibility: Both models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The MA4013 part number covers both variants — no hardware differences affect fitment between the two.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on V4 hardware. The BMS accepted charge handshake correctly, protection cutoffs triggered at expected voltage thresholds, and the fuel gauge IC tracked state-of-charge without errors after one full cycle.
• Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC build a new discharge curve against the replacement cell before high-current charging is reintroduced into an uncalibrated state.

Sudden shutdown at 20–30% on the Meitu V4 after a cell swap

This is a voltage cliff problem, not a capacity problem. When the modem transmits or the screen brightness peaks, instantaneous current draw pulls the cell voltage below the BMS cutoff threshold — even though the fuel gauge still shows 20–30% remaining. The old fuel gauge calibration curve doesn't match the new cell's discharge profile, so the reported percentage is optimistic right up until the cutoff fires. One complete discharge cycle down to auto-off, followed by an uninterrupted charge to 100%, resets the coulomb counter against the actual cell curve.

Battery percentage jumping erratically on the V4 after replacement

The fuel gauge IC on the V4 uses a stored discharge model calibrated to the original cell's impedance and capacity. A new cell has different internal resistance, so the IC's voltage-to-percentage mapping produces inconsistent readings — jumps of 5–15% in either direction are common in the first few cycles. This is not a faulty battery. Run two full discharge-charge cycles at standard (non-fast) charge rate. After the second cycle, the coulomb counter will have enough data to re-anchor its model, and percentage readings will stabilise.