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JBL Xtreme Splashproof Compatible Battery 7.4V 5000mAh Li-Po

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Fits JBL Xtreme Splashproof speaker; replaces GSP0931134 02 battery pack.
7.4V, 5000mAh lithium-polymer cell delivers full power to amplifier and wireless radio simultaneously.
Connector slides into speaker base with flat orientation; locking tab seats flush against housing wall.
We bench-tested this cell on sustained high-volume playback; BMS held stable voltage under combined amplifier and Bluetooth current draw.
On first charge after installation, discharge the speaker below 20% before recharging — prevents fuel gauge drift from constant top-offs.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.4V

Amp

5000mAh

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.

Compatible Models

Xtreme Splashproof

Replaces Part Numbers

GSP0931134 02

Technical Specifications

Voltage7.4V
Amp Hours5000mAh
Capacity5000mAh
Rate37Wh
Net Weight185g /6.53 oz
Gross Weight325g /11.46 oz
Approximate Weight325g /11.46 oz
Dimension 146.40 x 34.30 x 18.60mm

Product Highlights

  • Brand: JBL
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My JBL Xtreme Splashproof shows a full charge bar but the audio cuts out after about an hour — is that the battery failing?

Yes. This is fuel gauge drift, not a sudden cell failure. When the battery is repeatedly topped off without a full discharge cycle, the speaker's charge counter loses sync with the actual cell state, so it reports 100% on a pack with far less usable capacity. Run the speaker down below 20% once, charge it fully to 100%, and repeat twice — this recalibrates the gauge. If playtime stays short after three full cycles on a fresh replacement cell, the original pack has permanent capacity loss and needs replacing.

Audio starts distorting and sounds clipped well before the battery indicator hits empty — what's causing that?

The amplifier in the Xtreme Splashproof clips when supply voltage sags below its operating floor, even if the fuel gauge hasn't registered low battery yet. A degraded cell with high internal resistance drops voltage under heavy amplifier load faster than the gauge tracks it, so the speaker sounds distorted while still appearing to have charge remaining. The distortion is the amplifier hitting its lower voltage rail, not a speaker driver fault. Fitting a replacement cell with lower internal resistance eliminates the sag and the clipping that comes with it.

The speaker gets noticeably warm around the fabric housing during long play sessions — is that a battery problem or something else?

Both the amplifier board and the discharging Li-Polymer cell generate heat, and in the Xtreme Splashproof's enclosed housing that heat has limited paths out. A degraded cell running at higher internal resistance generates more heat per cycle than a fresh one, so warmth that worsens over time points to a battery that is working harder than it should. Normal operating temperature at the housing surface during extended play is warm to the touch but not hot. If the housing becomes uncomfortable to hold during moderate volume use, check whether the cell is swollen — a swollen Li-Polymer cell increases internal resistance sharply and must be replaced immediately.

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