Gobat II is essentially a 5000mAh rechargeable lithium-ion battery that the correct ports to power to grant to a USB-powered device. The goBATT II has two ports for power sharing. The first is a 10 watt port that can juice a iPad easily. The second is a 5 watt power port that can just about anything else.
An interesting thing to note, is not known for Scosche unit exclusivity. Case, when you buy Scosche goBATT II, the company will also throw in an adapter for the Galaxy Tab.
And if you happen to Revive Scosche app, you will be able to tell how low your device will take to recharge using the goBATT II.
This little device is truly one of the sleekest and most cost effective battery packs I have seen. The versatility alone makes it worth the $ 80.