Motorola XT2343 Replacement Battery PC60 3.91V 5100mAh

Motorola Moto G54 / XT2343 — 3.91V Li-Polymer Replacement Battery (PC60)

This is a 5100mAh, 3.91V lithium-polymer replacement battery for the Motorola XT2343 and Moto G54 smartphones. It replaces OEM part numbers PC60 and SB18D89641. Swap it when the original cell has degraded and the phone can no longer hold a useful charge.

• XT2343 and Moto G54 compatibility: Both the XT2343 and Moto G54 use the same battery bay geometry, connector pinout, and BMS handshake protocol — the same cell fits both variants without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Moto G54 unit. The BMS accepted the cell, reported state-of-charge correctly after one full cycle, and fast-charge handshake triggered normally from cycle two onward.
• Fuel gauge recalibration on first use: On the first use after installation, disable fast charging and let the phone complete one full discharge-to-charge cycle at standard current. This gives the fuel gauge IC a clean reference curve against the new cell before high-current charging begins on an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the Moto G54 after a cell swap

The Moto G54 shuts down mid-use at 20–30% because the fuel gauge IC is still calibrated to the discharge curve of the old, degraded cell. The new cell has a steeper voltage cliff under modem and display load than the IC expects, so the phone interprets a voltage drop as a dead battery before the cell is actually empty. One full discharge cycle — run the phone from 100% to automatic shutdown without fast charging — lets the coulomb counter rebuild its reference table. After that cycle, the percentage readout tracks the actual cell state correctly.

USB-PD fast charge not triggering on the first cycle after replacement

On the first charge after fitting a new cell, the charge IC in the XT2343 may stay at standard current and not negotiate the fast-charge protocol. This happens because the BMS reports an uncalibrated state-of-charge, and the phone's charge controller limits current until it trusts the cell data. Let the first cycle complete at standard rate — once the fuel gauge IC has a full baseline, fast charging resumes automatically from cycle two. No settings change or charger swap is needed.