About this replacement
JBL Xtreme Splashproof — 7.4V Li-Polymer Replacement Battery (GSP0931134 02)
This 7.4V, 5000mAh (37Wh) Li-Polymer battery replaces the GSP0931134 02 cell in the JBL Xtreme Splashproof portable Bluetooth speaker. It restores full power delivery to the speaker's amplifier stage and wireless radio. Use it when the original pack no longer holds charge or cuts out mid-session.
- Xtreme Splashproof platform fit: The Xtreme Splashproof runs a dual-amplifier board that pulls combined current from one Li-Polymer cell at 7.4V. The GSP0931134 02 form factor — 146.40 × 34.30 × 18.60mm — matches the battery bay precisely, and the connector pinout aligns with the speaker's fuel gauge circuit without modification.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Xtreme Splashproof platform. The BMS held stable voltage under simultaneous Bluetooth streaming and high-volume amplifier draw, with no mid-cycle cutoff or false low-battery triggers.
- Fuel gauge calibration tip: Let the speaker discharge below 20% at least once a month before recharging. The Xtreme Splashproof's fuel gauge drifts when the battery is constantly topped off from 50–80%, causing the indicator to report full charge on a cell that is already capacity-limited.
Bluetooth dropping at high volume on a new battery
At peak volume, the Xtreme Splashproof's amplifier and Bluetooth radio draw current simultaneously. If the cell's internal resistance is elevated — common in aged packs — voltage sags enough to trip the radio's undervoltage threshold while the amplifier keeps running. This creates the pattern of Bluetooth cutting out at loud audio but recovering at lower levels. A fresh 5000mAh cell with low internal resistance sustains the combined load without the voltage drop that causes the radio to disconnect.
Speaker won't wake from USB-C after sitting discharged for weeks
Li-Polymer cells that drop below approximately 2.5V per cell enter a deep-discharge state the USB-C PD circuit will not accept at normal negotiation voltage. The speaker appears completely dead — no LED response, no charging indication. Connect the speaker to a 5V USB-A charger first, which bypasses PD negotiation and feeds trickle current directly to the cell. Hold the charge for 20–30 minutes at 5V, then switch to the standard USB-C cable once the cell recovers above 3.0V per cell.