Not for the faint of heart, this is the battery pack for person who lives his life on the go, always. "The Juggernaut" Re-Fuel Rechargeable Power Bank is the last battery pack you"ll ever need. Charge up to two devices simultaneously for up to five full charges* to keep all your gear running as long as you do. Charge it, stow it in your backpack and it"s ready for a quick charge in a pinch. *Full charge based on battery capacity of iPhone 6 & 6S.