Hello. I'm new to the world of electric scooters and purchased 2 used ones the other day. I was told they were new in 2011. One runs, the other I discovered got moisture inside the hub, and is not turning, and I accidentally cut the wire trying to open it. Can't find any info as to maker, other than everything is from China. These when sold new were named Crazy Cat Scooters, by a person near San Diego who has a FB posting, but won't return my calls or e mail for questions, and is no longer in business. He lists these as having 4-12 volt batteries, but each scooter has 2-12 volts at 12ah, and there is no room in the zippered cover for more. Controller indicates 48 volts. I'm not sure where to find a replacement hub, but I think it's a 350watt. Could I go higher? I did a charge on the running scooter, and I rode it up a fairly steep road, but several power lights darkened, until I leveled out, and then all power lights returned. The front weel spins a bit upon exceleration, so I'm mostly looking for longevity for a level ride. Any ideas are appreciated, as I've looked at some posts, and know there is a high level of knowledge here. thanks Doug