92 EZ GO slow to start??

[CEThomas]

I have a 92 EZ Go electric that I purchased last winter. Around the house it ran great on flat ground. We took on vacation last week and we had some hills to go over and it would barely get over the hills, our friend who has an electric cart with older batteries had no problem. After we got home, I went out and went to pull it out of the garage and it will not go unless you held down the accelerator peddle for a while. After you hold it down, it will start to move and run until you stop and let it set for a while. Then you have to hold the peddle down until it starts to move again. Any ideal what it could be? Also we put new batteries in this spring and our friend with the electric golf cart that has old batteries was able to run a lot longer on a charge then we were able to run.

Thanks,