I don't understand the whole thing, but our company gave us some kind of fast-recharge device for our cell phones and computers - weighs about 6 or 8 ounces, and you attach via a USB cable. You then re-charge the recharger by connecting it to your computer when it's plugged in.

Target, Radio Shack, Best Buy, Walmart, and the cell phone and iPad places all have sales clerks (average age: 12) who can explain them a lot better than I can.