In order to carry out a boost charge, please follow the instructions below:
1) The headset should be in a charging position. On the base station there is a small recessed button. Press and hold this button for 1 second. On the SD series it is located on the underneath of the base station next to the microphone sensitivity dial. Pressing this recessed reset button provides a jolt to the battery to jump start charging.
NOTE: The headset should be in the charging position on the base station when the recessed reset button is pressed.
2) After the recessed reset button has been pressed the LED battery indicator lights will begin flashing indicating the boost charge process has begun.
3) Leave the headset charging on the base station for a minimum of 30 minutes.