We’ve seen various iPhone battery cases, such as those from Mophie. Now the Aigo aiPower i616 is aiming to join the tussle too and claims to double the battery life of the phone. Aside from offering additional juice thanks to its 1,500mAh battery, it also features a USB ribbon cable built-in, ensuring that you’ll be able to juice your phone up from USB ports without having to worry about losingthe cable. Of course, if you need something longer, you can still hook up your standard microUSB cable into the port built into the left side of the battery. It’ll set you back $80, and it’s up to you to decide if you’re willing to pay that price for additional juice.