Sony Ericsson Xperia Z5 Replacement Battery LIS1593ERPC 3.8V 2800mAh

Sony Ericsson Xperia Z5 / Z5 Dual — 3.8V Li-Polymer Replacement Battery (LIS1593ERPC)

This is a 3.8V, 2800mAh lithium-polymer replacement cell for the Sony Ericsson Xperia Z5 and Xperia Z5 Dual, including carrier variants SO-01H and SOV32. It replaces OEM part LIS1593ERPC and 1294-1249. The cell restores calling, messaging, and app use on devices where the original battery has degraded or failed.

• Xperia Z5 series fit: The Z5, Z5 Dual, SO-01H, and SOV32 all run the same 3.8V power rail and share an identical connector and BMS handshake profile — one cell covers all these variants without modification.
• Bench tested on actual hardware: We cycled this cell on a Z5 unit and confirmed the BMS accepted charge from the STAMINA mode controller, held voltage under sustained LTE modem load, and did not trigger an over-current cutoff during screen-on peak draw.
• First-cycle fuel gauge reset: On first use after installation, disable fast charging and run one full discharge-charge cycle to completion. This gives the Xperia Z5's fuel gauge IC time to map the new cell's discharge curve before the charge controller applies high-current bursts against an uncalibrated baseline.

Why the Xperia Z5 reports wrong battery percentage after a cell swap

The Xperia Z5 uses a coulomb counter and a stored discharge curve to calculate state of charge. When you fit a new cell, the stored curve belongs to the old, degraded battery. The fuel gauge IC applies that worn curve to a fresh cell, so the percentage reading is inaccurate from the first boot. One complete discharge to shutdown followed by a full charge to 100% lets the IC rebuild its reference curve against the actual new cell. After that cycle, percentage jumps and erratic readings typically stop.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff issue, not a capacity problem. Under peak modem, GPS, or screen load, the cell voltage drops sharply — faster than the fuel gauge predicts — and the BMS triggers a protective shutdown before the displayed percentage reaches zero. It happens most often in the first few cycles when the fuel gauge is still uncalibrated. Run two full discharge-charge cycles, and the IC will learn where the voltage drop-off actually occurs for this specific cell. If shutdowns continue after two full cycles, check that resting voltage at full charge reads 4.35V on a multimeter.