With the DJI FPV Battery Charging Hub, you can conveniently recharge up to three FPV flight batteries unattended. The hub requires a DJI FPV Battery Charger (not included) to draw power from an available AC outlet. Once plugged in, the hub can detect the battery life of each connected battery. It will then charge each battery in sequence, starting with the battery with the most power left. That way, you can grab that battery and get into the air as fast as possible. A full single battery recharge takes only approximately 55 minutes, and a status LED will provide essential charging information.