iPhone Lightning Cable Key Sized.
Always have a cable on you.
ChargeKey is a portable lightning cable, the shape of a
house-key. It’s designed to fit onto your keychain just like a house-key, so
you’ll always have an iPhone cable on you. Use ChargeKey to charge/sync your
iPhone from any USB port.
iPhone Cable
Works with: iPhone 5/5s/5c, Lightning iPad, iPad Mini
Source Link: http://www.hellonomad.com/products/chargekey-iphone5