The FAZUA charger charges the battery via a magnetic plug with with 3 amps. This means that the battery is fully charged after 3-4 hours. After 2 hours, 80% of the charge level has already been reached. As soon as the charger is connected to the power, its LED lights up green. If you connect the charger to the FAZUA ENEGERY 430/480, the LED lights up red until the battery is fully charged.