About this replacement
LG XBOOM Go XG9 — 14.8V Li-ion Replacement Battery (EAC64790801)
This is a 14.8V, 6700mAh Li-ion battery for the LG XBOOM Go XG9 portable Bluetooth speaker. It replaces OEM part EAC64790801 and IBA007GA. Fits XG9QBK.ABRALLB, XG9QBK.ABRALLK, XG9QBK.DEUSLLB, and related XG9 variants.
- XG9 speaker platform fit: These XG9 model codes all share the same 14.8V battery rail, connector type, and BMS handshake protocol. The cell configuration and communication lines are identical across the variant suffixes, so one pack covers the full XG9 lineup.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the XG9 platform. The BMS negotiated correctly on first connection — no fault codes, no false low-battery flags, and the fuel gauge tracked accurately across the full charge range.
- Monthly discharge cycle for XG9 users: If the XG9 lives on a desk and gets topped off constantly, discharge it below 20% at least once a month before recharging. Constant shallow cycling without a full discharge causes fuel gauge drift on this cell configuration and accelerates capacity fade faster than normal use would.
Audio distorting before the battery indicator reaches empty on the XG9
The XG9 amplifier draws a significant current spike during loud playback. When the cell is aged or degraded, internal resistance rises and voltage sags under that spike — dropping below the amplifier's clean operating threshold before the fuel gauge reads empty. The speaker clips the audio signal because the amp is starved of voltage, not because the battery is truly flat. A fresh cell with lower internal resistance maintains the voltage rail under high-draw conditions, eliminating the distortion before the gauge reaches critical.
XG9 not accepting a charge after sitting unused for several months
Li-ion cells left uncharged for extended periods can self-discharge below the USB-C PD minimum acceptance voltage — typically around 2.5V per cell. When the pack drops that low, the BMS blocks charging as a protection measure and the speaker appears completely dead. To recover it, connect the charger and leave it for 15–20 minutes without interruption — most BMS circuits trickle-charge the cell back above the threshold before allowing full current. If the indicator still shows nothing after 30 minutes of continuous connection, confirm the cable and adaptor are supplying at least 9V DC input.