Hello, I'm new to the site and electric vehicles, I just recently bought a daymak Hamilton electric scooter because y 50cc 2 stroke scooter kept breaking down on me. So far I'm really liking the e scoot, but the speed sis a little lacking, even though it's a 60v system. I'm guessing that the contributing factor would be the controller. The range of the scooter is great, I took it for a good long 50km ride and the battery only went down to 24%. It is running 5 12v 20ah sla batteries. Now since I can't afford to get the lifepo4 batteries and the charging system, I was wondering if a better controller or if I added another battery to make it 72v if that would help increase the speed. As I said I'm new to EV's