About this replacement
Sony Ericsson Xperia E4 Series — 3.8V Li-Polymer Replacement Battery (LIS1574ERPC)
This 3.8V, 2300mAh Li-Polymer cell replaces the original LIS1574ERPC battery in the Sony Ericsson Xperia E4 family. It fits the Xperia E4, E4g, E4 Dual, and E4 Dual HSPA, among other variants in that lineup. Dimensions are 87.80 × 52.10 × 3.70mm — matching the original tray footprint exactly.
- Xperia E4 family compatibility: The E4, E4g, and E4 Dual variants all share the same battery tray geometry, connector pinout, and BMS handshake protocol. One cell covers the entire platform because Sony Ericsson standardised the power rail and charge IC across that generation.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on an E4 Dual unit. The BMS accepted the cell without error flags, charge termination triggered correctly at 4.35V, and the fuel gauge IC tracked state-of-charge without erratic jumps after the first full cycle.
- Fuel gauge recalibration after installation: On first use after fitting this cell, disable fast charging and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging pushes current into an uncalibrated register.
Sudden shutdown at 20–30% on the Xperia E4 after a cell swap
The Xperia E4's modem and display together pull enough current that a new, uncalibrated cell can sag below the BMS cutoff voltage before the percentage reaches zero. The fuel gauge IC is still working from the old cell's discharge curve, so it shows 25% when the actual cell voltage has already dropped to the cutoff threshold under load. This is not a fault in the replacement cell — it is a calibration mismatch between the coulomb counter and the new cell's internal resistance profile. Run one full discharge from 100% to automatic shutdown, then charge uninterrupted to 100%, and the BMS will remap the cutoff point correctly.
Xperia E4 showing wrong battery percentage after replacement
When the fuel gauge IC was calibrated against the old degraded cell, its stored discharge curve no longer matches the new cell's voltage-vs-capacity profile. The result is percentage readings that jump — most often a sudden drop from 40% to 15%, or a reading that stalls at 1% for an extended period. The fix is a single full calibration cycle: charge to 100%, use the phone normally until it shuts down automatically, then charge back to 100% without interruption. After that cycle, the coulomb counter recalibrates to the new cell and percentage reporting stabilises.