JBL Charge 5 Replacement Battery 3.7V 7800mAh GSP-1S3P-CH4A
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JBL Charge 5 Replacement Battery 3.7V 7800mAh GSP-1S3P-CH4A - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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.
Disclaimer
Disclaimer
⚠️ 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.
JBL Charge 5 Replacement Battery 3.7V 7800mAh GSP-1S3P-CH4A - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
7800mAh
JBL Charge 5 — 3.7V Li-ion Replacement Battery (GSP-1S3P-CH4A)
This 3.7V Li-ion battery replaces the factory cell in the JBL Charge 5 portable Bluetooth speaker. It also fits the Charge 4 using part number GSP-1S3P-CH4A. Capacity is 7800mAh (28.86Wh), matching the original cell specification.
- Charge 4 and Charge 5 compatibility: Both speakers share the same cell footprint and connector orientation. The GSP-1S3P-CH4A part number covers both generations. The BMS handshake protocol and voltage rail are identical across these two models, so no firmware mismatch occurs on install.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Charge 5 unit. The BMS accepted the pack without error flags, balanced the cells correctly, and the speaker's LED fuel gauge reported accurately across the full voltage range.
- Fuel gauge calibration tip: If you use this speaker on a desk and top it off constantly, let it discharge below 20% at least once a month before reconnecting the charger. Constant shallow cycling causes fuel gauge drift — the indicator will show full charge while actual capacity quietly erodes.
Audio distorting before the battery indicator reaches empty
The Charge 5 amplifier draws a sharp current spike at high volume. When the cell voltage sags under that combined amplifier and radio load, the amp clips before the battery indicator triggers its low-charge warning. The indicator reads the resting voltage, not the loaded voltage under peak draw. If you hear distortion while the gauge still shows one or two bars, check that the cell is above 3.5V under load — a healthy cell at this capacity holds that rail without sag.
Speaker won't respond to USB-C charging after sitting unused for months
A deeply discharged Li-ion cell can fall below the USB-C Power Delivery minimum acceptance voltage — typically around 2.5V per cell. At that point the speaker's charging circuit doesn't negotiate a PD handshake and nothing happens when you plug in. Connect the speaker to a 5V USB-A charger instead of a USB-C PD source first; the lower-current path can tickle the BMS back into accepting charge. Once the cell reaches roughly 3.0V, switch to the standard USB-C cable and charge normally.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: JBL
- Manufacturer: CS
- Series: Standard
- Color: Blue
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My JBL Charge 5 shows a full charge but the audio cuts out after about an hour of play — is the battery failing?
Yes, this is fuel gauge drift from shallow cycling. When the speaker is topped off repeatedly without a full discharge, the BMS loses track of true capacity and the gauge reads optimistically. Let the battery discharge below 20% fully, then charge to 100% in one uninterrupted session to recalibrate. If the problem persists after two or three of these cycles, the original cell has degraded and replacement is the fix.
Bluetooth keeps dropping when I push the volume past halfway on a fresh charge — why?
The amplifier and Bluetooth radio draw simultaneously at high volume, and that combined current spike can cause momentary voltage sag if the cell's internal resistance has risen. The radio loses signal during the sag, not from interference. We saw this on the bench with aged cells — the new 7800mAh pack holds the voltage rail stable under that combined load. Check that the battery contacts are clean and seated fully; even a slight gap adds resistance and worsens sag.
The Charge 5 feels noticeably warm on the fabric grille during long play sessions — is that normal or a battery issue?
Some warmth is expected — the amplifier generates heat during sustained output, and the battery adds its own discharge heat inside the enclosed housing. It becomes a concern if the speaker activates its thermal protection and cuts audio without a low-battery warning. That cut-out means the combined heat inside the cabinet has exceeded the BMS thermal threshold. Move the speaker to an open surface away from fabric or cushions during extended play, and keep ambient temperature below 35°C to keep the internal temperature within the BMS operating window.
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