Boasting a massive internal battery (2500 mAh) and its own power management system that maintains over-charge, over-current, and short-circuit protection, the Hi5 Powerbank carries enough energy to double mobile usage. Its aluminum unibody design, while thick in comparison to most other cases, does a solid job of keeping the iPhone shielded and can power third-party USB devices as well.

Click here to Buy it Now at iBattz, $80