About this replacement
JBL Charge 2+ — 3.7V Li-Polymer Replacement Battery (MLP912995-2P)
This 3.7V, 6000mAh Li-Polymer battery replaces the original pack in the JBL Charge 2+ and Charge 2 Plus portable Bluetooth speakers. It matches the OEM part numbers MLP912995-2P and GSP1029102. Voltage, capacity, and connector position match the original so no modification is needed.
- Charge 2+ and Charge 2 Plus fit: Both model names share the same chassis, the same 3.7V power rail, and the same BMS handshake protocol. One battery covers both variants without any hardware difference.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on a Charge 2+ unit. The BMS accepted the cell without fault flags, balanced the cell voltage cleanly on full charge, and held steady current draw during sustained high-volume playback.
- Monthly full-discharge cycle for the Charge 2+: The Charge 2+ sees heavy desk-top use where owners top it off before it drops below 50%. Let the speaker drain below 20% at least once a month before recharging — skipping this causes fuel gauge drift that makes the battery appear full when it is not.
Bluetooth dropping at high volume on the Charge 2+
At high volume, the amplifier and Bluetooth radio draw current simultaneously. On an aged or weak cell, this combined spike causes voltage to sag below the radio module's minimum operating threshold, and the Bluetooth stack resets. The speaker may reconnect within seconds, making it look like a pairing issue rather than a power issue. A fresh 6000mAh cell with low internal resistance keeps the voltage rail stable under that combined load.
Audio distorting before the battery indicator reaches empty
When the cell voltage sags under load, the amplifier receives less headroom than it needs and clips the audio signal — you hear crackle or distortion while the LED still shows charge remaining. This happens because the fuel gauge reads resting voltage, not voltage under the amplifier's actual draw. It gets worse as internal resistance rises with cell age. After fitting a replacement, confirm the speaker plays cleanly at full volume down to the final LED bar before cutoff.