Could be loose wire, connection or corroded connection. Could be motor is going out or needs new brushes. Could be slippage between motor connection to wheels. Could be tires are getting smooth and losing traction.
My electric golf cart is fully charged, but lacks power, especially on hills. What's wrong?
Well all electric golf carts are pretty weak,(generally speaking) I mean everytime I go to play a round most of the time they have electric carts. They always feel real weak going up steep inclines. I think thats normal.