1. Start with the headset on the charger and all the cords in place.
2. Press and hold the small recessed button to the right of the dipswitch pane on the back of the cube for 10 seconds. This provides a jolt to the battery to bypass any electrical glitches and jumpstarts charging.
3. Let the headset sit on the charging station, undisturbed, for 30 minutes.
4. Remove the power and USB cords for 1 hour. This eliminates all traces of the internal electronics glitch.
5. Reconnect power and USB.