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JBL Wind 3 Replacement Battery 3.7V 1100mAh Li-Polymer

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From $25.99 USD $31.99
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Fits JBL Wind 3 and Wind 3S speakers, replaces OEM part GSP903052 02 directly.
3.7V at 1100mAh delivers 4.07Wh total — enough for full wireless playback cycles on this compact speaker form factor.
Connector seats flush into the battery slot with a single locking tab; orientation marked on the cell body matches the housing contact layout.
We bench-tested this cell in a Wind 3 chassis; BMS accepted the pack on first insertion and pulled steady current under sustained audio output at moderate volume.
On first charge after install, let the speaker run down below 20% before topping off — shallow cycling without a full discharge causes fuel gauge drift on the Li-polymer chemistry and masks real capacity loss over time.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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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

3.7V

Amp

1100mAh

JBL Wind 3 / Wind 3S — 3.7V Li-Polymer Replacement Battery (GSP903052 02)

This is a 3.7V, 1100mAh (4.07Wh) Li-Polymer replacement battery for the JBL Wind 3 and Wind 3S portable Bluetooth speakers. It slots into the same position as the original GSP903052 02 cell and restores wireless audio playback. Use the dimensions — 49.50 x 30.00 x 8.50mm — to confirm fitment before ordering.

  • Wind 3 and Wind 3S shared platform: Both models run the same 3.7V single-cell Li-Polymer configuration and use an identical connector and BMS handshake, which is why one battery covers both SKUs without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Wind 3 unit and confirmed the BMS accepted the pack without triggering a protection cutoff. Charge termination and low-voltage cutoff both tripped at expected thresholds.
  • Fuel gauge reset after swap: After fitting this battery, run it down to the low-battery indicator before recharging fully — this lets the speaker's fuel gauge calibrate to the new cell and prevents the indicator from reporting inaccurate charge levels from the first use.

Bluetooth dropping at high volume on a fresh battery

At peak volume, the amplifier and Bluetooth radio draw current simultaneously. On a Li-Polymer cell at 3.7V nominal, a combined current spike can pull the cell voltage below the BMS sag threshold momentarily. The BMS interprets this as a low-cell event and interrupts output, which cuts audio or drops the Bluetooth link. Keeping volume below maximum during the first few charge cycles lets the cell stabilise its internal resistance and reduces the sag magnitude.

Speaker shows full charge but audio drops before the indicator reaches empty

This is voltage sag causing amplifier clipping before the battery reads as depleted. As cell capacity degrades — or on a new cell with an uncalibrated fuel gauge — the speaker's indicator lags behind the real state of charge. Under audio load, the voltage drops faster than the gauge tracks, and the amplifier hits its minimum operating voltage first. Run the pack to the low-battery warning, then charge fully to 4.2V in one uninterrupted cycle to recalibrate the gauge.

Compatible Models

Wind 3 Wind 3S

Replaces Part Numbers

GSP903052 02

Technical Specifications

Voltage3.7V
Amp Hours1100mAh
Capacity1100mAh
Rate4.07Wh
Net Weight22g /0.78 oz
Gross Weight47g /1.66 oz
Approximate Weight47g /1.66 oz
Dimension 49.50 x 30.00 x 8.50mm

Product Highlights

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

Frequently Asked Questions

My JBL Wind 3 won't turn on after the battery sat dead for a few weeks — is the new battery the problem?

A deeply discharged Li-Polymer cell can drop below the USB charging controller's minimum acceptance voltage, which is typically around 2.5V. When a cell sits at that level, the charger circuit refuses to initiate a charge cycle. Connect the speaker via USB and leave it for 20–30 minutes without powering it on — the protection circuit on a fresh replacement cell should recover and allow normal charging to begin. If the LED shows no response after that window, check the USB cable and port first before assuming the battery.

The Wind 3 gets noticeably warm on the handlebar during long listening sessions — is that a battery issue?

Some heat is expected. The amplifier generates heat under sustained output, and the Li-Polymer cell adds its own discharge heat in a compact housing with limited airflow. The combination is concentrated in a small enclosure, so surface warmth is normal. If the speaker becomes hot to the touch rather than warm, that points to the amplifier running at high volume for an extended stretch — reduce volume and let the unit cool before resuming playback.

After a few months, the Wind 3S plays noticeably less before needing a charge again — what causes this on a replacement cell?

Shallow cycling accelerates capacity fade on Li-Polymer cells. If the speaker is regularly topped off from 60–70% without fully discharging, the cell loses calibration and the active material fatigues faster. Let the battery drop below 20% at least once a month before recharging to 4.2V in a full uninterrupted cycle. That single habit slows the fade curve significantly on a 1100mAh cell of this size.

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