I bought this stand up scooter for $850. It's made by a company called http://goped.com" [Broken]. It can go upto 20mph and I weigh 142lbs. But the problem is, as with all electric scooters is they get low range. Mine get's about 10 miles and it runs on stock SLA batteries packs. Picture: http://www.neoscooters.com/prodimages/goped-ESRExbig.jpg I would like to go 40-45mph with plenty of torque. I already have a gas one that can do this but is too loud so I stopped riding is for my neighbors sake I would like to use Hydrogen fuel cells but how long would a liter tank of hydrogen last with a 2000W motor (my current one is 1100watts)? How many fuel cells would I need? I wan't as much range as possible while still fitting the fuel cells in the 24"x12"x2" battery compartment. Also can anybody suggest a motor?