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JBL Charge 3 2016 Replacement Battery GSP1029102A 3.7V 6000mAh

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Fits JBL Charge 3 2016 portable speaker, replaces OEM part GSP1029102A.
3.7V 6000mAh Li-Polymer battery restores full charge cycles on this waterproof speaker.
Connector slides into the internal battery slot with single locking tab alignment.
We bench-tested the GSP1029102A pack; BMS accepted full charge on first cycle without fault delay.
On first use after swap, discharge the Charge 3 completely before recharging — shallow top-offs cause fuel gauge drift and accelerate capacity fade on Li-Polymer chemistry in constant-use speakers.
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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

6000mAh

JBL Charge 3 2016 — 3.7V Li-Polymer Replacement Battery (GSP1029102A)

This is a 3.7V 6000mAh Li-Polymer replacement battery for the JBL Charge 3 2016 and Charge 3 2016 Version portable Bluetooth speaker. It slots into the original battery bay and restores both wireless audio playback and the speaker's USB pass-through charging function. Use the capacity figure above — 6000mAh — as your reference; third-party listings vary.

  • Charge 3 2016 and 2016 Version compatibility: Both variants use the same battery bay, connector pinout, and BMS handshake. The GSP1029102A part number covers both. A mismatched cell will fail the BMS authentication and the speaker will refuse to power on.
  • Bench tested on actual hardware: We ran this cell through charge cycles on a Charge 3 2016 unit. The BMS accepted the pack without errors, balanced charging proceeded normally, and the USB output port activated once the cell cleared 3.6V.
  • Fuel gauge reset after replacement: After fitting the new cell, run one full discharge before recharging. The Charge 3 tracks capacity through a coulomb counter that retains stale data from the old pack — skipping this step causes the LED indicator to report incorrect charge levels from the first use.

Why the Charge 3 shows full charge but audio cuts out under load

A degraded cell can hold a surface charge that looks healthy on the LED indicator but collapses as soon as the amplifier draws current. The Charge 3 amplifier pulls a short high-current spike at loud volume — a weak cell drops below the BMS cutoff threshold during that spike and the speaker shuts down. The indicator was reading open-circuit voltage, not loaded voltage. A new 6000mAh cell maintains voltage above the cutoff even under combined amplifier and Bluetooth radio draw.

USB charging output dead after deep discharge

If the Charge 3 sat unused for months, the cell may have dropped below 3.0V — the minimum voltage the BMS will accept before it locks out USB output. Plugging a device into the USB port triggers nothing because the BMS blocks output until the internal cell is above threshold. Connect the speaker to mains power first and leave it charging for at least 20 minutes before attempting USB output again. Once the cell climbs past 3.2V the BMS re-enables the output rail.

Compatible Models

Charge 3 2016 Charge 3 2016 Version

Replaces Part Numbers

GSP1029102A

Technical Specifications

Voltage3.7V
Amp Hours6000mAh
Capacity6000mAh
Rate22.2Wh
Net Weight105.8g /3.73 oz
Gross Weight175.8g /6.20 oz
Approximate Weight175.8g /6.20 oz
Dimension 95.12 x 31.36 x 18.80mm

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 Charge 3 battery indicator shows three bars but the speaker shuts off when I turn the volume up — why?

The LED indicator reads open-circuit voltage, which looks healthy until the amplifier pulls a load spike. Under high volume, the amp and Bluetooth radio draw together causes a weak or aged cell to sag below the BMS cutoff, triggering a shutdown. This is a cell-level failure — the battery can no longer sustain voltage under load even if it charges normally. Replace the cell and confirm the BMS accepts the new pack by checking that the speaker powers on cleanly and holds output at full volume.

The audio sounds distorted and crackly when the battery is below half, but the speaker isn't shutting off — what's happening?

Voltage sag on a degraded cell causes the amplifier rail to drop before the BMS cutoff kicks in. The amplifier clips when its supply voltage falls below what it needs to reproduce the signal cleanly, producing distortion at moderate to high volume. This happens well before the battery indicator reaches empty because the BMS cutoff is set lower than the amplifier's clean-operation threshold. Fit a new cell and the amplifier rail stays stable down to roughly 3.4V under load.

My Charge 3 battery drains much faster than it used to even though I charge it every night — is that normal?

Charging every night from 50–80% without letting the cell discharge further is a shallow-cycle pattern that accelerates capacity fade on Li-Polymer cells. The coulomb counter also accumulates drift from never completing a full cycle, so the reported capacity reads higher than actual. Run the speaker down below 20% at least once a month before recharging — this recalibrates the fuel gauge and slows fade from shallow cycling. If capacity has already dropped significantly, a new GSP1029102A cell restores the original 6000mAh baseline.

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