Originally Posted by Tr1cK
All you should have to do is plug in the internal battery and then plug in the unit. I believe it will charge as long as the switch is off.
That's what I thought. The instructions didn't call for hooking up the internal battery. The instructions said that this unit was ready to go and could provide a short amount of battery backup right out of the box. In order to receive optimal battery life, the unit should charge for 16 hours.