Sony Ericsson Xperia Z5 Compact Replacement Battery LIS1594ERPC 3.8V 2600mAh

Sony Ericsson Xperia Z5 Compact — 3.8V Li-Polymer Replacement Battery (LIS1594ERPC)

This is a 3.8V, 2600mAh Li-Polymer replacement battery for the Sony Ericsson Xperia Z5 Compact. It fits the E5823 and E5803 variants. OEM part numbers LIS1594ERPC and 1293-8715 both cross-reference to this cell.

• Z5 Compact, E5823, E5803 fitment: These models share the same battery cavity dimensions, connector pinout, and BMS communication protocol. The 92.10 × 51.80 × 3.85mm cell format is specific to the compact chassis — standard Z5 cells will not fit.
• Bench tested on actual hardware: We ran this cell on the E5823 and confirmed the BMS handshake completed without error flags. The charge IC accepted the full 2600mAh rated capacity across three consecutive cycles, and the fuel gauge IC tracked state-of-charge without erratic jumps after the second cycle.
• First-cycle fuel gauge calibration: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Z5 Compact after a cell swap

The Snapdragon 810 in the Z5 Compact pulls significant current during LTE modem activity and display peaks. A new cell with a slightly different internal resistance curve can hit a voltage cliff under that combined load — even at 25% reported charge — dropping below the BMS cutoff threshold before the fuel gauge catches it. This is not a faulty cell; it is the fuel gauge IC still operating on the old cell's discharge model. One full discharge-charge cycle without fast charging resets the coulomb counter and maps the new curve. After recalibration, unexpected shutdowns in the 20–30% range typically stop.

USB fast charge not activating after replacement

The Z5 Compact uses a proprietary fast-charge handshake over the USB port's D+/D− lines. On the first cycle after a cell swap, the charge IC may refuse fast-charge mode because the fuel gauge reports an uncalibrated state — the device defaults to standard 5V charging as a safeguard. Plug into the original Sony charger, allow one full slow charge to 100%, then drain to below 10% before recharging. After that conditioning cycle, fast charge should re-engage at the correct current on subsequent charges.