There are many phone cases that can charge your Iphone with the cost of slight bulkiness and coins. Iphone however has now created their own Smart Battery Case extending the usage of their phones between charges. The design has the apple logo and a slight but minor extension in the back. It honestly looks alright, and the perks are worth it.
The benefits include up to 25 hours of talk time, 18 hours of internet usage, and over 20 hours of video playback. They come in both black and white options for both the iPhone 6 and iPhone 6S. They retail for around 99$ each.