Mophie has consistently been the standard-bearer in back-up phone power with their various JuicePack offerings. Their latest aluminum-clad Powerstations further solidify this position, offering superior supplemental go-juice for your Apple & Android devices. Available in five different capacities: 1X, 2X, 3X, 4X, 5X, & 8X your device’s normal capacity, these USB, quick-charge backups keep you going for the long haul.