JBL Go Smart Replacement Battery GSP682634 3.7V 900mAh

JBL Go Smart — 3.7V Li-Polymer Replacement Battery (GSP682634)

This is a 3.7V, 900mAh Li-Polymer cell that replaces the original GSP682634 battery in the JBL Go Smart portable Bluetooth speaker. It restores wireless operation when the original cell no longer holds a charge. Dimensions are 41.05 × 31.15 × 7.62mm — measure your existing cell before fitting.

• Go Smart platform fit: The Go Smart runs its Bluetooth radio and Class D amplifier from a single 3.7V Li-Polymer cell. This replacement matches the original voltage rail and connector so the speaker's fuel gauge reads correctly from first boot.
• Bench tested on actual hardware: We cycled this cell on the Go Smart platform and confirmed the BMS accepted charge at the correct 4.2V cutoff. The speaker powered on without a reset prompt and audio output remained stable through the charge cycle.
• Discharge cycling for the Go Smart: The Go Smart sits on desks and charges constantly between short sessions. Let the cell drop below 20% at least once a month before plugging in — continuous top-off charging without a full discharge causes fuel gauge drift on this small-capacity cell.

Why the Go Smart cuts audio before the battery indicator reaches empty

The Go Smart's Class D amplifier draws a sharp current spike during loud passages. On a degraded or low-capacity cell, that spike pulls the cell voltage below the amplifier's operating threshold before the fuel gauge registers empty. The speaker cuts or distorts audio as a result — not because the battery is flat, but because internal resistance is too high to sustain the peak draw. A fresh 900mAh cell with lower internal resistance handles those spikes and keeps output clean down to the actual low-voltage cutoff at around 3.0V.

Go Smart won't respond to USB charge after sitting unused for weeks

A 900mAh Li-Polymer cell left unused can self-discharge below the USB-C PD minimum acceptance voltage — typically under 2.5V — at which point the BMS locks out charging to protect the cell. The speaker shows no charge indicator and appears dead. To recover it, connect a charger that supports trickle or pre-charge mode and leave it for 20–30 minutes before expecting the charge LED to respond. If the cell has dropped below 2.0V and the BMS does not recover within an hour, replace the cell rather than continuing to force charge it.