We're in the process of creating an electric unicycle like the ones here. We already have a design that we're sure will be competitive in the market once out. Now, I am assigned on working with the charging circuit. I was thinking of using power MOSFETs but I'm not quite sure which one should I get. Do you have any recommendation? Preferably 60v. The charging period is critical so I'd like to have a MOSFET that has no problem with long charging period.