The Exovolt Portable Battery Pack grows with your power demands. If you’re on the go, and constantly running low on juice, you may want to check out the Exovolt Plus. Each unit packs a punch with 5,200mA that is stack-able to an unlimited storage capacity. Two stacked units should fully charge your iPad, and your iPod mini. The Exovolts are priced slightly higher than the competition, but well worth it considering the stack-able feature, and the minimal design.