Sony Ericsson Xperia Z4 Replacement Battery LIS1579ERPC 3.8V 2900mAh

Sony Ericsson Xperia Z4 / Z3+ — 3.8V Li-Polymer Replacement Battery (LIS1579ERPC)

This 3.8V, 2900mAh Li-Polymer battery replaces the original LIS1579ERPC cell in the Sony Ericsson Xperia Z4, Xperia Z3+, and Xperia Z3 Plus. It also fits the E6533 and over a dozen additional variants sharing the same battery bay and connector. Use it when the original cell no longer holds a useful charge or the phone shuts down unexpectedly under load.

• Xperia Z4 and Z3+ platform fit: Sony Ericsson used the same 3.8V rail, battery connector, and BMS handshake across the Z4, Z3+, and Z3 Plus lines. All three models share the LIS1579ERPC footprint, so one replacement cell covers the full group without modification.
• Bench tested on actual hardware: We cycled this cell on a Z4 unit and confirmed the BMS accepted the new cell without fault codes. Charge acceptance was normal from the first cycle, and the phone completed a full charge-discharge loop without thermal events or cutoffs.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This allows the fuel gauge IC to recalibrate its discharge curve against the new cell before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the Xperia Z4 after a cell swap

This happens because the fuel gauge IC is still running the discharge curve from the old, degraded cell. The new cell has a different voltage-to-capacity profile, so the phone reads 20–30% when the cell is actually near its low-voltage cutoff. Under screen or modem load, voltage drops sharply and the system shuts down to protect the cell. Run one full discharge to below 5% and a full charge to 100% without interruption — this resets the coulomb counter and aligns the gauge to the new cell curve.

Phone not powering on after the replacement battery sat in storage

Li-Polymer cells self-discharge in storage. If the cell dropped below approximately 2.5V per cell, the BMS enters a lockout state and blocks normal charging to prevent thermal risk. The phone will show nothing on screen when plugged in. Connect to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. Once the BMS detects voltage recovery above its threshold, charging resumes normally and the phone will boot.