The main problem with a lot of smartphone covers with an integrated charger is that they're usually too bulky -- that is until the ppyple Active Case AC4 came along.
The ppyple Active Case AC4 is a slim-fit iPhone charger that also doubles as a cover. The accessory is split up into two separate parts: a backplate with an L-shaped on the bottom and a thermoplastic elastomer. Both parts will effectively protect the mobile from any bumps and scratches that may occur during use. Of course, there's custom cutouts that allows easy access to the connector and buttons. Then there's the embedded RF module that keeps battery consumption in check, and it improves talk time by approximately 30% in areas with poor reception.