Logitech UE Hyperboom 3 14.4V Replacement Battery 533-000170

Logitech Ultimate Ears Hyperboom 3 — 14.4V Li-ion Replacement Battery (533-000170)

This is a 14.4V, 3400mAh (48.96Wh) Li-ion replacement battery for the Logitech Ultimate Ears Hyperboom 3 portable Bluetooth speaker. It replaces OEM part number 533-000170. Fit models include the UE Hyperboom, Ultimate Ears Hyperboom, and S00175.

• Hyperboom platform compatibility: The Hyperboom 3, UE Hyperboom, and S00175 all run the same 14.4V battery rail with a matching connector and BMS handshake protocol. Swapping between these variants requires no wiring or connector modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Hyperboom platform. The BMS accepted the pack without fault codes, held the 14.4V rail under combined amplifier and Bluetooth radio load, and showed no thermal anomalies through extended playback.
• Monthly discharge cycle for Hyperboom users: The Hyperboom tends to live on a desk or shelf, constantly topped off via USB-C before it drops below 50%. Let the battery discharge below 20% at least once a month before recharging — this resets the fuel gauge and slows Li-ion capacity fade caused by shallow cycling.

Audio distortion before the battery indicator reaches empty

At high volume, the Hyperboom amplifier draws a heavy current spike. If the cell has aged or is partially discharged, voltage sags under that load and drops below the amplifier's clean operating threshold before the gauge shows empty. The result is clipping and distortion even though the speaker still shows charge. A new cell with lower internal resistance maintains a stable voltage rail under the same load, eliminating the sag that causes clipping. If distortion starts before 20% charge showing on the indicator, internal resistance in the old cell is the cause.

Hyperboom won't wake from USB-C after sitting unused for weeks

A deeply discharged Li-ion cell can fall below the minimum acceptance voltage for USB-C Power Delivery negotiation — typically under 3V per cell. When this happens, the charger cannot initiate a PD handshake and the speaker appears completely dead. Most Hyperboom units have a recovery path: connect the original OEM charger (not a low-output USB port), hold the power button for 10 seconds, and leave it on charge undisturbed for 30 minutes. If the cell has dropped too far, the BMS will not recover it and the battery requires replacement. Check for a slow amber LED pulse after 30 minutes — no pulse means the cell is unrecoverable.