[not-a-golfer]

My next door neighbor gave me this Electric EZGo 2 days ago..no idea the year or model or how to figure that out....all I know is it looks brand new. She said she bought it new....and has only rode it once. For some reason now when you charge the cart, charger will say its charged and when you go to drive it...pedal all the way to the floor it starts going but very slow and a vibration feeling in the cart really noticable when holding the steering wheel, and within a minute or so it just stops. Water was low on the batteries when I got it so I added distilled water...cleaned all terminals on the batteries and its still doing the same thing..she showed me a receipt from 3 months ago where she had some controller changed out....wanna say it was $450-$500 bucks...so I'm guessing that is still go..I've read all the stickys and searched all the forums for common issues but I haven't had any luck...has anyone had this similar issue and if not any ideas where to look next....thanks