What this gadget is is a Coleman 5.4V Flashcell Cordless Screwdriver. That's a mouthful. What it means is that it doesn't have a conventional battery. Instead it uses an ultra capacitor.
The effect of this is that it charges in 90 seconds. It does have a downside. It has about half the capacity of a traditional rechargeable screwdrive. This isn't much of a downside when the charge time is less that the time it takes you to go to the bathroom.
Popular Mechanics has a good write-up here.
Here's a YouTube video on it.