About this replacement
Sony Xperia X Performance (F8131 / F8132) — 3.8V Li-Polymer Replacement Battery (LIP1624ERPC)
This 3.8V, 2500mAh Li-Polymer cell replaces the internal battery in the Sony Xperia X Performance and Xperia X Performance TD-LTE Dual. It fits model numbers F8131 and F8132, covering both single-SIM and dual-SIM variants. Dimensions are 71.80 × 53.80 × 4.80mm — match these against your original cell before installation.
- F8131 and F8132 coverage: Both variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. One cell covers the full X Performance lineup without modification.
- Bench tested on actual hardware: We cycled this cell through a full discharge and charge sequence on an F8132 unit. The BMS accepted the handshake without fault codes, and the fuel gauge IC began tracking from the first cycle.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.
Sudden shutdown at 20–30% on the Xperia X Performance after a cell swap
The Xperia X Performance uses a coulomb counter-based fuel gauge IC that was calibrated to the original cell's discharge curve. A new cell has a different internal resistance profile, so the gauge can misread remaining capacity. Under modem load or screen-on bursts, the cell voltage drops faster than the IC expects, triggering an emergency shutdown well above 0%. One full discharge-charge cycle without fast charging corrects the calibration and eliminates premature shutdowns.
Phone does not power on after the replacement battery sat in storage
Li-Polymer cells self-discharge in storage. If the voltage drops below approximately 2.5V per cell, the BMS enters a lockout state to prevent damage and blocks normal startup. The phone will show no response — no boot screen, no charge indicator. Connect the phone to a wall charger rated at least 5V/1A and leave it for 20–30 minutes without interruption. Once the BMS detects voltage above its recovery threshold, the charge indicator will appear and the phone will respond normally.