Motorola QA50 Moto G Power 5G Compatible Battery 3.91V 4850mAh

Motorola Moto G Power 5G 2024 — 3.91V Li-Polymer Replacement Battery (QA50)

This is a 3.91V, 4850mAh Li-Polymer cell sourced to match the OEM QA50 specification for the Motorola Moto G Power 5G 2024. It fits the Moto G24 Power 4G and XT2415 series as well. Swap it in when the original cell no longer holds charge or the phone shuts down before the percentage hits zero.

• XT2415 platform compatibility: The Moto G Power 5G 2024 and Moto G24 Power 4G share the same battery bay dimensions and connector pinout — 90.00 × 65.20 × 4.30mm — which is why the QA50 cell covers all variants in this lineup without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the XT2415 platform. The BMS accepted the cell without error flags, and the charge IC handed off correctly from CC to CV phase at the expected 4.35V ceiling.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.

Sudden shutdown at 20–30% on the replacement cell

A new Li-Polymer cell has a steeper voltage cliff than a worn cell the fuel gauge IC was originally calibrated to. When the modem fires at full power — during a 5G handoff or a video call — instantaneous current draw pulls the cell voltage below the BMS cutoff threshold even though the displayed percentage reads 25%. The phone interprets this as a hard undervoltage fault and shuts down to protect the cell. One full discharge-charge cycle with fast charging disabled recalibrates the coulomb counter to the new cell's actual voltage curve, and the shutdowns stop.

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

After a cell swap, the charge IC on the Moto G Power 5G 2024 sometimes stays in trickle mode rather than negotiating the USB-PD fast charge contract. This happens because the BMS flags the cell as unknown until it completes one full baseline charge cycle at standard current. Plug into a USB-PD charger and let it run to 100% without interrupting — the handshake completes by the end of that first cycle. Fast charging activates normally on subsequent charges.