Sony Ericsson Xperia Z2 Replacement Battery LIS1543ERPC 3.8V

Sony Ericsson Xperia Z2 — 3.8V Li-Polymer Replacement Battery (LIS1543ERPC)

This is a 3.8V, 3200mAh Li-Polymer replacement battery for the Sony Ericsson Xperia Z2 smartphone. It fits the D6503 and D6543 variants, plus the Sirius Viv, using OEM part number LIS1543ERPC (also listed as 1588-4170). Install it when your original cell can no longer hold adequate charge through a standard day of use.

• D6503 and D6543 compatibility: Both Xperia Z2 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol — this cell fits either board revision without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Z2 mainboard and confirmed the BMS accepted the cell, reported state-of-charge correctly after one full cycle, and did not trigger overtemperature cutoff during a standard charge run.
• Fuel gauge recalibration on first use: After installing this cell, disable fast charging and run one complete discharge-to-charge cycle before resuming normal use. The Xperia Z2's fuel gauge IC is calibrated to your old cell's discharge curve — pushing fast charge current into an uncalibrated cell produces inaccurate percentage readings and early cutoffs.

Sudden shutdown at 20–30% on the Xperia Z2 after a cell swap

This is a voltage cliff issue, not a capacity fault. A new cell has a slightly different discharge curve than the aged original. The Xperia Z2's fuel gauge IC still references the old curve, so it reports 25% remaining when the cell voltage is already dropping below the modem and display load threshold — around 3.5V under draw. The phone cuts out to protect the board before the OS can report low battery. One full discharge-charge cycle resets the coulomb counter and maps the new curve correctly.

Phone warm near the battery bay during the first charge after replacement

A fresh Li-Polymer cell typically has higher internal impedance than a broken-in cell. During the first charge, the charge IC works against that elevated impedance, which produces more heat than usual at the battery contact area. This is normal for the first one or two cycles and settles as the cell conditions. If the device becomes hot to the touch — above a mild warmth — or charging stops before 100%, check that the replacement cell's connector is fully seated at 3.3V before retrying.