So you want to charge up to 4 smartphones in one shot? The Lenmar Mutant has you covered. This 20,800mAh portable power pack has 4 USB ports you can use to charge tablets and smartphones. It has 2 2.4A USB ports just to charge your new iPads. The battery charges in 10 hours. The device has LED light indicators to show you charge status. Want it? It sets you back under $200.