This one is a power adapter only, no battery. It's intended to charge the laptop and phone with power from electrical mains only. I tend to think that NewerTech missed an opportunity to make this device a charger and USB hub. Probably would've added three bucks in cost, but would have made it so much more useful. Baby steps. I'm sure that kind of thing will be coming soon enough.

A real killer device for the business traveller would be a combination battery pack/power adapter/USB hub with built-in WiFi router.