Checking the charge status of the accupacks

To display the expected remaining battery life of the BA 20 accupack in the receiver:
Short-press the On/Off/Check button.
The 4-step LED display lights up green to indicate the expected remaining battery life.

When the right LED of the 4-step LED display flashes red – regardless of whether the On/Off/Check button has been pressed –, the capacity of the BA 20 accupack is only sufficient for less than 15 minutes of operation.