Sony Xperia L1 LIP1621ERPC Replacement Battery 3.8V 2550mAh

Sony Xperia L1 / G3311 / G3312 — 3.8V Li-Polymer Replacement Battery (LIP1621ERPC)

This is a 3.8V, 2550mAh lithium-polymer replacement battery for the Sony Xperia L1, Xperia L1 LTE, G3311, and G3312 smartphones. It replaces OEM part number LIP1621ERPC when the original cell degrades or fails. Fitting takes around 20 minutes with a pry tool and a Phillips screwdriver.

• G3311 and G3312 compatibility: Both the single-SIM G3311 and dual-SIM G3312 share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell fits both variants without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a G3311 unit. The BMS accepted the cell without error flags, and the charge IC ramped to standard current without thermal events.
• Fuel gauge recalibration on first use: After installation, disable fast charging and run one full discharge down to auto-shutoff, then charge uninterrupted to 100%. This gives the Xperia L1's coulomb counter a clean reference cycle against the new cell's discharge curve before fast-charge current is applied.

Why the Xperia L1 reports wrong battery percentage after a cell swap

The Xperia L1 uses a coulomb counter in the fuel gauge IC to estimate state of charge. That counter was calibrated to the discharge curve of the original, degraded cell — not the new one. After swapping to a fresh LIP1621ERPC cell, the IC reads voltage points that no longer match its stored curve, so it reports percentages that jump or plateau incorrectly. One complete uninterrupted discharge-to-charge cycle resets the reference map and brings percentage readouts back in line.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display pulls a short high-current spike and the cell voltage drops below the BMS cutoff threshold — even though the fuel gauge still shows charge remaining. On a fresh lithium-polymer cell, the internal impedance is slightly higher than a broken-in cell, so the voltage sag under load is steeper. The BMS reads that sag as a depleted cell and cuts power. After two or three full charge cycles, cell impedance drops and the shutdowns stop. If they continue past five cycles, check that the replacement cell seated flat with no pressure on the flex connector, as a bent contact raises impedance further.