POWERMAX is the MUST HAVE item. This small unit packs a huge punch and fits in the palm of your hand. It boasts a 13,600 mAh Polymer Organic cell that can jump start a car or truck up 10 times on a single charge. R&D teams removed car batteries from 4 cars and then connected the POWERMAX directly to the battery terminals. Cars started 4 times and the POWERMAX battery still had a 75% charge.