when charging Garmin nuvi 650 battery, you may not find a battery indicator light and don’t know when it is fully charged. you can check it about a little over an hour of charging Garmin nuvi 650 by turning the unit on and seeing how much the battery indicator is up. If it is not full then keep trying. Check it every so often, ours usually doesnt take that long, we charge it while we are driving. or you can recharge it with the USB cable.