The Smart Battery - Low profile and lightweight - only weighing 1.4 ounces. Use as a universal external charger or slide onto any Third Rail Case (sold separately). When upgrading, just pick up a new case and keep your battery! Good for the environment and your wallet!
Using micro USB you can charge other devices with included cables, share the power with friends - compatible with all Third Rail cases. 1250 mAh lithium ion battery, check your power capacity with the push of a button.