Here is a cool battery strap that can be attached to your messenger bag to charge your smartphone on the go. It makes the perfect gift for business travelers as it can provide up to 50 hours of additional surf time for your device. The rechargeable Vor-Power padded shoulder strap comes with two USB outputs and a micro USB cable output. It even has pockets for your smartphone and credit cards.
This battery strap is flexible and durable. It has charge indicator lights too. The design is water resistant. Sets you back $129.99 at this time.