Technocel Battery Boost charges your phone and reads microSD cards

The Technocel Battery Boost is an interesting device that is designed to be used as portable storage and to keep your phone charged up on the go. The device has a retracting USB port and is designed to fit on a keychain.

The battery inside the small device has 600mAh of power and is a rechargeable lithium ion battery. The battery promises to add about an hour of run time to your mobile phone. The small charger also has a microSD card slot.

That microSD card slot lets you plug the device into your computer to move and store files like you would any other flash drive. The USB connector is retractable for a more compact design and you don't have to mess around with caps that get lost easily. The device is Sprint branded and can be picked up at Sprint stores for $29.99.