ITEM NAME:Upgrade 2in1 12V portable car heating cooling fan heater defroster demister %《.1 x 12V Portable Car Heater Defroster. Although these cars’accumulators are 12V, but their currents are only 5A-10A. In this case, the heater won’t be as hot as general. Type: Fan heater. Position the car heater on the floor or dashboard.