Oivo

Oivo is an on-the-go iPhone charger that uses AA batteries to power up your phone. It's so small that it fits on your keys and in your pocket. Oivo has the lightning connector already built in and strong neodymium magnets (phone and credit card safe) are doing the magic to hold the batteries in place while charging.

Oivo can charge your iPhone up to 100% with one set of batteries, which are easily available everywhere around the world.