The Eartec Multi-Port Charging Base can recharge batteries for UltraLITE, UltraPAK, and HUB. Choose between a multi-Charger with two (2) or eight (10) bays. When the batteries reach full charge, the corresponding LED turns from red to green indicating that the battery is charged up and ready to go. The use of external batteries allows users to keep their systems up and running with minimal down time. The charge time is approximately three hours. The charging base ships with an AC adapter.