Sony Ericsson Xperia M4 Replacement Battery 3.8V 2400mAh

Sony Ericsson Xperia M4 / M4 Aqua — 3.8V Li-Polymer Replacement Battery (LIS1576ERPC)

This 3.8V, 2400mAh Li-Polymer cell replaces the original LIS1576ERPC battery in the Sony Ericsson Xperia M4 and Xperia M4 Aqua Dual LTE. It fits the E2363, E2333, and related variants in the M4 lineup. Capacity is rated at 9.12Wh and matches the stock specification from the product data.

• Xperia M4 Aqua Dual LTE compatibility: The M4, M4 Aqua, and M4 Aqua Dual LTE all share the same battery bay dimensions and the same 3.8V power rail. The LIS1576ERPC connector and BMS handshake are identical across E2363, E2333, and the other M4 variants — one cell fits the full range.
• Bench tested on actual hardware: We cycled this cell on an Xperia M4 Aqua unit. The BMS accepted the new cell without a fault flag, charge IC ramped to full current, and the fuel gauge IC registered a full-state charge after one complete cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle at standard current. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Xperia M4 after a cell swap

This happens when the fuel gauge IC is still running calibration data from the old, degraded cell. The new cell has a steeper voltage cliff at lower state-of-charge, so the phone cuts power before the gauge reaches 0%. The BMS reads a voltage drop under modem or display load and triggers a protection shutdown to prevent over-discharge. One full discharge cycle — down to automatic shutdown, then a complete charge — lets the coulomb counter reset against the new cell's actual curve.

Phone won't power on after the battery sat in storage

Li-Polymer cells that drop below approximately 2.5V per cell trigger a BMS lockout to prevent damage. A phone that has been sitting discharged for weeks may show nothing on screen when you press power. Plug into a wall charger — not a PC USB port — and leave it for 15–20 minutes before pressing power. The charge IC needs to trickle current into the cell long enough to bring voltage above the BMS re-enable threshold, typically around 2.8–3.0V, before the phone will boot.