It also has a secret in the shape of a clever flip compartment ... on the go and this battery case provides up to nine hours of additional talk time for your iPhone 5 or 5s. Considering it ...

It took awhile, but that missing element has arrived: The Prong PWR Case for iPhone 5/5S adds a battery to the mix. But not where you think -- the battery lives outside the case. Huh? The Prong ...