Motorola Moto E6 KE40 Replacement Battery 3.8V 2500mAh

Motorola Moto E6 / XT2005 Series — 3.8V Li-ion Replacement Battery (KE40)

This is a 3.8V, 2500mAh Li-ion replacement battery for the Motorola Moto E6. It fits the XT2005, XT2005DL, and XT2005-1 model variants. The OEM part number is KE40, also listed as SB18C54512.

• XT2005 variant coverage: The XT2005 series spans several regional carrier builds — XT2005, XT2005DL, XT2005-1, and additional variants. These all share the same battery bay dimensions, connector orientation, and 3.8V cell voltage, so one replacement covers the full lineup.
• Bench tested on actual hardware: We ran this cell through full charge cycles on the Moto E6 platform. The BMS accepted charge from both USB-A 5V and USB-C input without flagging an incompatible cell. Voltage held stable across the flat discharge curve through screen-on and modem-active load.
• Fuel gauge recalibration on first install: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.

Why the Moto E6 reports wrong battery percentage after a cell swap

The Moto E6 uses a fuel gauge IC that maintains a learned discharge curve for the installed cell. When you swap in a new cell, the IC still references its old calibration data, so the percentage it displays is based on the previous cell's characteristics — not the new one. This mismatch shows up as jumpy readings, inflated percentage, or a sudden drop mid-use. One full discharge to shutdown followed by an uninterrupted charge to 100% resets the coulomb counter and gives the IC accurate data to work from.

Sudden shutdown at 20–30% remaining on the replacement cell

This happens when the fuel gauge IC has not yet recalibrated to the new cell's voltage cliff — the point where cell voltage drops sharply under modem or display load. The phone calculates shutdown threshold from the old curve, so it misses the actual low-voltage point and cuts out early. The cell itself is not defective. Run two full discharge-charge cycles and the IC will relearn the new cell's behaviour. After recalibration, the shutdown threshold aligns with the cell's true minimum voltage of approximately 3.2V under load.