The low battery power is also indicated on the battery icon in the bottom-right of the main screen, next to the channel number. The amount of white in the inner of the battery icon represents the amount of charge left in the battery. In the image below, the inner of the battery icon is black, which means there is no charge in the battery.
It is also shown on the battery status screen (see Main Screen).
To recharge the battery, you will need the mini USB cable that is supplied with your SyncBac PRO and a mini USB compatible charger socket (not supplied). The mini USB cable connects to the SyncBac PRO via the mini USB port on the left-hand edge (see Ports).
Note: You do not have to disconnect your SyncBac PRO from the HERO4™ when charging.