The Battery Boost from Technocel is a portable battery pack with a built-in MicroSD card reader. It doesn’t offer a lot in the way of extra juice at 600mAh, but what it lacks in power, it makes up for in portability. Clip this little guy on your keychain and you’ll be able to add some extra power to any micro USB enabled device whenever you might need it. It’s available for $29.99 at Sprint Stores nationwide, Web sales, and 1-800-SPRINT1.
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Not bad for the price. Good for emergency use.