Sony Ericsson Xperia Z3 Mini Replacement Battery LIS1561ERPC 3.8V

Sony Ericsson Xperia Z3 Compact / Z3 Mini — 3.8V Li-Polymer Replacement Battery (LIS1561ERPC)

This 3.8V, 2600mAh Li-Polymer battery replaces part number LIS1561ERPC in the Sony Ericsson Xperia Z3 Mini and Xperia Z3 Compact, including model numbers D5803 and D5833. It restores full power capacity to the handset when the original cell has degraded or no longer holds a usable charge. Physical dimensions are 95.55 × 51.33 × 3.44mm — verify these against your existing cell before installation.

• Z3 Mini and Z3 Compact compatibility: Both the Z3 Mini and Z3 Compact variants use the same LIS1561ERPC cell — identical voltage rail, connector pinout, and BMS handshake. One battery covers the full range of D5803 and D5833 units without modification.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on a D5803 unit. The BMS accepted the cell cleanly, charge IC handed off correctly at 4.35V, and no protection tripping occurred under screen-on and modem load.
• Fuel gauge recalibration after swap: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This gives the fuel gauge IC time to map its coulomb counter against the new cell's discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the Z3 Compact after a cell swap

A new cell has a slightly different voltage-to-capacity curve than the worn cell the fuel gauge IC was trained on. When the phone hits a steep voltage cliff under modem or display load, the IC reads 20–30% remaining but the cell voltage drops below the BMS cutoff threshold — the phone shuts off instantly. This is not a faulty battery. One full discharge from 100% to automatic cutoff, followed by a full charge, gives the coulomb counter enough data to recalibrate. After that cycle, shutdowns at high reported percentages typically stop.

USB charging not working on first cycle after replacement

The Xperia Z3 Compact's charge IC runs a handshake with the battery BMS on first connection. If the new cell has been in storage at a low state of charge, the BMS may present a high-impedance signal that causes the charge IC to stall the session. Connect the phone to a wall adapter — not a PC USB port — which delivers a stable 5V supply. Hold this connection for at least 10 minutes before expecting the charging indicator to appear. If the phone responds, charge fully to 100% before first use.