About this replacement
Harman/Kardon Traveler — 3.8V Li-Polymer Replacement Battery (GSP075462)
This is a 3.8V, 3200mAh Li-Polymer replacement battery for the Harman/Kardon Traveler portable Bluetooth speaker (HTRAVBLK-00050). It replaces the OEM cell GSP075462 when the original pack no longer holds a charge through a full listening session. Capacity is 3200mAh (12.16Wh) — matching the factory specification.
- Traveler and HTRAVBLK-00050 compatibility: Both model designations share the same 3.8V power rail, PCM connector pinout, and cell footprint (65.40 × 53.30 × 7.20mm). One battery covers both.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the Traveler mainboard. The BMS accepted the cell without fault flags, fuel gauge initialised correctly, and the amplifier stage drew current normally across the full charge window.
- Monthly discharge cycle for the Traveler: Let the speaker run down below 20% at least once a month before plugging it in. The Traveler charges opportunistically when docked on a desk — constant top-off charging without a full discharge causes fuel gauge drift and accelerates capacity fade on the Li-Polymer cell.
Audio distortion before the battery indicator reaches empty on the Traveler
As a Li-Polymer cell ages, its internal resistance rises. Under amplifier load, voltage sags faster than the fuel gauge can register. The amplifier hits its lower operating threshold and clips the audio signal before the indicator shows critical. Fitting a fresh cell with lower internal resistance restores the voltage headroom the amplifier needs. After swapping the battery, charge to full and run one complete discharge cycle to recalibrate the fuel gauge.
Traveler not responding to USB-C after sitting unused for several months
A deeply discharged Li-Polymer cell can drop below the minimum voltage threshold that USB-C PD chargers will negotiate with — typically around 2.5V per cell. When this happens, the speaker shows no charging indicator and appears completely dead. The BMS has disconnected the cell to prevent damage and will not re-engage until the cell voltage is above the recovery threshold. Use a charger that supports trickle or pre-charge mode, leave it connected for 15–20 minutes, and the BMS should re-initialise and accept a normal charge.