Sometimes you just need that little extra battery boost in order to keep your cell phone juiced, and that’s where the Technocel Sprint Battery Boost might be of use to you. It’s a rather small device that can be juiced up via your standard USB port and can charge microUSB devices, offering them up to an additional hour of talk time. While it might not be the most important feature to you, it’s also worth mentioning that it includes a microSD card slot, allowing it to double up as a microSD card reader, so you don’t have to bring along an additional microSD card reader in your bag. The Sprint Battery Boost is currently going for $29.99 at Sprint stores and online.