I've been thinking of ways to hype out my scooter, make go faster! I have the batteries I bought before! I'm thinking of taking my older batteries and somehow connecting four batteries up! I've gutta think should I connect them in a series or a parallel connection! I've gutta make sure the scooter can handle more speed too. I'm looking on www.spinlife.com for battery cables cause if I decide to go parallel they have to be heavy gauge wire!