Hardware Freight has good batterys for ya. these electric pocket bikes arent all that fast, but you still should get him a good helmet, some knee and elbow pads, and a 1 piece mechanic work suit from walmart, so the only thing that gets scuffed up incase of a fall is the bike, not your grandson
. Since these bikes dont run very fast you can get him riding as soon as he has protective equipement and the bike is ready... then maybe when he is a little older and use to riding you can get him a nice gas powered pocket bike, which will provide him with a little more pleasure, and provide you with a new toy to tinker on, LOL.
Anyways, Good Luck with the project, and keep tinkering!
Mathieu
Anyways, Good Luck with the project, and keep tinkering!
Mathieu