Road warrior gear is always important to us and keeping our gadgets charged is pretty high on our priority list. Meet Callpod’s Fueltank Duo. This portable battery has two ports that allow you to charge two gadgets simultaneously. It also has a third port on the back side (mini USB) so you can charge the internal battery and both of your gadgets all at once. There’s even a power meter to let you know how much juice you have left. We’ve owned one of these for about a year and a half and have absolutely no complaints. You can get about two full iPhone charges without refueling. Callpod has multiple tips available to allow you to charge 3000+ gadgets.