The PowerPak Xtreme is an external battery charger that can take a beating. It’s shock proof, dirt proof,and waterproof when submerged in up to 3 feet of water. It comes with dual USB ports allowing you to charge two gadgets simultaneously. It’s compatible with most smartphones and 5v tablets. The PowerPak Xtreme is light weight at 9 oz and allows you to charge your phone up to six times on a single charge.