1. how long will one fully charged battery run the unit ? And could you plug the unit into a auto mobile ? By David ConradThere is not enough information to determine the runtime of the PW6000-12 with a single battery. We need the amp/hrs of the battery and the wattage draw of the AC item. Batteries are sold by amp/hrs, so the higher the amp/hrs the longer the runtime. In addition, appliances with high AC wattage draws will deplete the battery faster than low wattage draws. The next question ask if the inverter can be plugged into an automobile. The inverter cannot be connected to a DC outlet due to the limited wattage output inherent in DC outlets.