I bought two E300s about a year ago. I already replaced the batteries once. I replaced the motor in one and it ran very slow. The problem I was having was it would run for 15 minutes and then would get very slow. It suppose to run for 40 minutes continous. I called razor said it was batteries replaced them. MOtor replaced still can't get it to run for 40. But it I let it rest for half and hour with out charging is runs fast again for another 15 minutes. What is wrong wit it????

Toys - Razor - E300s Electric Scooter With Seat