New electronic device ?AUTO-CHARGE, original patent/copyright from Japan, a multi-purpose Voltage Stabilizer with built in Battery Doctor System and Interference Reducer System. Once you use AUTO-CHARGE, your car is in best control by this product, it will solve small problems that due to unstable voltage during driving. What is more wonderful, it is so easy to installed, with just a plug into cigar-lighter socket, will activate this device. Unlike other fuel saving product, by adding chemical and tablets into the fuel tank, increase the risk of car damages.