A supplementary battery which fits into a regular Bicycle card case.
It is designed to look like a normal deck when you grip it in mechanic's grip.
There is a LED prediction on the side (prediction varies).
The size is small, but you will be able to charge an iPhone 5 twice.
A must-have battery which looks like a card deck
Cable color may vary
Smart phone not included
Customize with your favorite tuck box and card back