Motorola LC40 Moto E7 Compatible Battery 3.8V 3350mAh

Motorola Moto E7 / Moto E 2020 — 3.8V Li-Polymer Replacement Battery (LC40)

This is a 3.8V, 3350mAh Li-Polymer replacement battery for the Motorola Moto E7 and Moto E 2020 (XT2052DL, XT2052-1). It fits directly in place of the original LC40 cell when the factory battery no longer holds adequate charge. Capacity figures come from the product data — 3350mAh, 12.73Wh.

• XT2052 series compatibility: The XT2052DL and XT2052-1 share the same battery bay dimensions, connector pinout, and BMS handshake protocol as the standard Moto E7. All variants in this lineup accept the LC40 cell without modification.
• Bench tested on actual hardware: We cycled this cell on an XT2052 unit and confirmed the BMS accepted the new cell, initialised charge control, and stepped through CC/CV phases without error flags or thermal shutdown events.
• Fuel gauge recalibration on first cycle: After fitting this cell, run one full discharge to auto-shutdown, then charge uninterrupted to 100% before resuming normal use. This gives the coulomb counter a clean reference point against the new cell's discharge curve.

Why the Moto E7 reports wrong battery percentage after a cell swap

The fuel gauge IC on the XT2052 uses a stored discharge curve built from the original cell's impedance profile. A new LC40 cell has different internal resistance, so the IC's state-of-charge estimate drifts immediately. This shows up as percentage jumps, premature low-battery warnings, or the indicator sticking at one value for long stretches. One full discharge-charge cycle lets the coulomb counter re-anchor its model to the replacement cell and restores accurate reporting.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display draws a current spike that drops cell voltage below the BMS cutoff threshold — even though the reported percentage reads higher. A fresh cell with an uncalibrated fuel gauge is especially prone to this because the IC cannot predict the voltage cliff accurately. The fix is the same recalibration cycle: full discharge to shutdown, then a complete uninterrupted charge. After that cycle, the BMS has an accurate low-voltage floor mapped to this specific cell and should hold the charge curve past 3.5V under load.