EAC64790802 LG XBOOM XG8T Replacement Battery 14.8V 2600mAh

LG XBOOM XG8T — 14.8V Li-ion Replacement Battery (EAC64790802)

This is a 14.8V, 2600mAh (38.48Wh) Li-ion replacement battery for the LG XBOOM XG8T portable Bluetooth speaker. It slots into the XG8T's battery bay and restores untethered playback when the original cell has degraded. Voltage and connector match the OEM spec for this model.

• XBOOM XG8T platform fit: The XG8T runs a 14.8V four-cell Li-ion pack that feeds both the amplifier board and the Bluetooth radio through a shared power rail. A drop in cell voltage affects both simultaneously — audio and wireless signal degrade together. This battery maintains the same voltage curve the XG8T's BMS expects across that shared rail.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the XG8T and monitored the BMS handshake. The protection circuit responded correctly to charge termination and low-voltage cutoff. No false low-battery flags appeared during the test cycles.
• Fuel gauge recalibration tip: The XG8T uses a fuel gauge IC that drifts when the battery is never fully discharged. Let the speaker run down to below 20% at least once a month before plugging in — skipping full discharge cycles causes the gauge to report inaccurate charge levels, which can trigger premature shutdowns even when cell capacity is still good.

Audio distorting before the battery indicator reaches empty on the XG8T

The XG8T amplifier draws a sharp current spike at high volume. As the Li-ion cell ages and its internal resistance rises, that spike causes a voltage sag across the pack. The amplifier clips before the battery indicator registers low because the BMS reads resting voltage, not loaded voltage. Replacing the cell restores the pack's ability to hold voltage under load — check that the resting voltage reads at least 15.8V after a full charge before testing at volume.

XG8T won't wake from USB-C charging after sitting unused for months

Li-ion cells self-discharge during storage. If the XG8T sits unused for several months, the pack can drop below the USB-C PD minimum acceptance threshold — typically around 2.5V per cell, or roughly 10V for a four-cell pack. At that voltage, the BMS locks out charging to protect the cells, and the charger sees no handshake. Use a bench charger or a compatible Li-ion recovery charger to apply a trickle charge at 0.1C to bring the pack above 12V, then switch to the standard USB-C charger to complete the cycle.