JBL Link 10 Replacement Battery 3.7V 3600mAh GSP103465

JBL Link 10 — 3.7V Li-Polymer Replacement Battery (GSP103465)

This is a 3.7V 3600mAh Li-Polymer replacement battery for the JBL Link 10 portable smart speaker. It fits the Link 10 directly, restoring wireless audio playback and voice assistant function when the original cell degrades. Capacity figure is from product data: 3600mAh / 13.32Wh.

• Link 10 fit: The Link 10 runs a single Li-Polymer cell at 3.7V nominal. This replacement matches that voltage rail and the GSP103465 footprint — 54.50 × 34.00 × 20.50mm — so the cell seats correctly against the speaker's internal frame without forcing the housing.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Link 10 board. The onboard BMS accepted the pack without error flags, balanced charge terminated cleanly at 4.2V, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• Fuel gauge reset after swap: After fitting a new cell, the Link 10 fuel gauge can read inaccurately for the first few cycles. Run the speaker down past the low-battery warning at least once before recharging fully — this lets the gauge recalibrate to the new cell's actual capacity curve.

Capacity fade from constant top-off charging on the Link 10

The Link 10 sits on a desk or countertop for many users, plugged in whenever not in use. Keeping a Li-Polymer cell above 80% state of charge continuously accelerates electrolyte oxidation at the cathode. Over months, usable capacity shrinks noticeably even though charge cycles stay low. Letting the cell drop below 20% at least once a month before a full recharge slows that degradation on this specific usage pattern.

Audio distorting before the battery indicator reaches empty

As the Link 10 cell discharges toward its lower voltage limit, the amplifier stage draws current faster than a weakened cell can supply it at loud volumes. Voltage sags briefly under each bass transient, and the amplifier clips — producing crackling or distortion before the battery icon shows critical. This is not a speaker fault. It means the cell voltage under load is already dropping below the amplifier's clean-supply threshold. Fitting a fresh 3600mAh cell restores the current headroom; if distortion persists on a new battery, check that USB-C input voltage is stable at 5V during charge.