The Power Magic Ultra battery charges with the ignition on, and powers your dash cam when the ignition is off.Power Magic Ultra Battery supports two installation modes and automatically adapts its charging current accordingly.Just plug the battery into the 12V auxiliary power outlet (cigarette lighter socket) of your vehicle. Charging current: 5A - Charging time: approx. 90 minutes.Or for the fastest charging speed, connect the battery to the fuse panel. Charging current: 9A - Charging time: approx. 50 minutes.Check detailed battery info from your phone via the Battery Manager App Support.