Motorola GK50 Moto E Power Replacement Battery 3.8V 3350mAh

Motorola Moto E Power / E3 Power — 3.8V Li-ion Replacement Battery (GK50)

The GK50 is the OEM-matched cell for the Motorola Moto E Power, Moto E3 Power, Moto E3 Power Dual SIM, and XT1706. It runs at 3.8V with a 3350mAh (12.73Wh) capacity. If your phone shuts down unexpectedly, won't hold a charge, or the battery has swollen, this is the direct cell swap.

• Moto E Power / E3 Power platform fit: The XT1706 and Dual SIM variants share the same battery bay geometry, connector pinout, and charge IC voltage rails. One cell fits all four listed models without modification.
• Bench tested on actual hardware: We ran the GK50 through full charge and discharge cycles on the XT1706. The BMS accepted the handshake on first connection, charge IC engaged normally, and thermal cutoff stayed within spec under sustained screen-on load.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle to ambient conditions. This lets the fuel gauge IC map the new cell's discharge curve before the charge IC starts pushing higher current into an uncalibrated cell.

Why the Moto E Power reports wrong battery percentage after a cell swap

The fuel gauge IC on the XT1706 uses a coulomb counter calibrated to the original cell's discharge curve. When you install a new cell, the IC is still referencing the old curve, so the percentage readout drifts. You'll often see the phone report 40% and then jump to 15% without warning. One full discharge down to auto-shutdown, followed by an uninterrupted charge to 100%, forces the IC to recalibrate against the new cell and restores accurate reporting.

Sudden shutdown at 20–30% on the replacement GK50

This is a voltage cliff problem, not a capacity problem. Under peak load — modem transmit, screen at full brightness, GPS active — the cell voltage drops sharply, and the BMS trips the output before the OS can save state. The fuel gauge IC hasn't yet learned where that cliff sits on the new cell. Run two full discharge-charge cycles without fast charging, then check shutdown behaviour. If the phone still cuts out above 15%, check that USB charging current isn't being throttled by a damaged port — measure charge voltage at the connector, which should read between 4.9V and 5.1V under a standard 5W charge.