Power Management Recommendation for driver stations

[sanddrag]

Originally Posted by Kage

one of the mentors from our team brought a portable laptop charger, and it worked phenomenally!
it was kinda like what you are suggesting, but in a light, conviniently small package. it weighed no more then 3 pounds, and was about the size of a letter envelope, and about a half an inch thick. it powered the laptop for the entire day whenever the laptop was not in the pits, and it still had charge to spare at the end of the day! (it is also re-chargable itself, so its uses are unlimited)

Do you have any specifics on this device? Sounds interesting. I am currently designing/building a similar device. Would there be any interest for this?