LG M320 BL-T30 Replacement Battery 3.85V 4500mAh

LG M320 / K10 Power / X Allumage 2 — 3.85V Li-Polymer Replacement Battery (BL-T30)

This is a 3.85V, 4500mAh Li-Polymer replacement battery for the LG M320 and the wider BL-T30 platform, including the K10 Power and X Allumage 2. It replaces OEM part numbers BL-T30 and EAC63458501. Fit this cell when the original battery no longer holds a charge or causes unexpected shutdowns.

• BL-T30 platform compatibility: The M320, K10 Power, and X Allumage 2 all draw from the same 3.85V rail and use the same connector pinout and BMS handshake. That shared platform spec is why one cell covers all three devices.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the M320 platform. The BMS accepted the cell without fault codes, held voltage through a full screen-on load cycle, and charged correctly via the device's charge IC.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter to the new cell's discharge curve before high-current charging begins on an uncalibrated cell.

Sudden shutdown at 20–30% on the LG M320 after a cell swap

The LG M320's fuel gauge IC uses a stored discharge curve from the old cell. A new 4500mAh Li-Polymer cell has a steeper voltage cliff at lower states of charge than the degraded cell it replaced. When the modem fires a high-current burst or the screen peaks brightness, voltage sags below the BMS cutoff threshold — the phone interprets this as empty and shuts off. The fix is one full uninterrupted discharge to near-zero, then a full charge at standard rate. After that cycle, the coulomb counter recalibrates and the shutdowns stop.

USB fast charge not working on the first cycle after replacement

The fast-charge handshake on the M320 runs a brief negotiation between the charge IC and the battery BMS before the device accepts elevated current. On the first cycle with a new cell, the BMS may refuse the high-current handshake until it has completed one baseline charge at standard rate. Connect via the original LG charging cable, let it complete a full standard-rate charge, then unplug and replug. Fast charge should activate on the subsequent session once the BMS registers a full baseline cycle.