The Air Case by Innoant, and currently crowdfunding on Indiegogo, is quite possibly the best battery case many people have ever used that balances thinness and power.
The Air Case provides an additional 2400mAh battery for iPhone 6/6S , 2800mAh for iPhone 6+/6S+/7/7+, which is equivalent to more than 12 hours extra talk time, 10 hours extra video play, 10 hours extra game time and 8 hours extra internet time. It takes about 1h45min to fully charge it, and 3.5hour to fully charge the Case and the iPhone together.
Compared to the Mophie Juice Pack Air which has a higher 2,750 mAh capacity battery and the Tylt Energi Sliding Power Case has an even larger 3,200 mAh battery capable of charging an iPhone 6 about 1.5x and 1.75x. The Aircase still wins when it comes to its thinness.
It is only 3.8 mm (0.15″) thick. This is the world’s thinnest battery iPhone case. When it is on your iPhone, it feels like it’s just a part of it.
There is a single point of charge for your Air Case and your iPhone, so you can charge both simultaneously using with your normal Lightning cord. It is also capable to protect your phone, although Air Case is thin and sleek, it is very robust. The outer shell bumper and the case protects your phone from all-around, making it shock-proof.
The Air Case for iPhone 6, 6S, 6+, 6S+ is available in the following three colors: Black ,White and Navy Blue. The Air Case for iPhone 7/7+ is available in Black for now.