just went to test drive the cart, and i have some type of problem. The cart will barely move and doesn't have hardly any power. Could it be the cables that I made? Thats really the only thing that has changed it think. I do have one battery that need to be replaced, may be that is is B.c it is only reading 5.3 volts, but all the others are reading 6.2. How to I test the cables to make sure they are good? I used copper lugs from the welding store and used electrical solder. If i didn't use enough solder maybe it isn't getting a good connection, but i felt lik the connections were pretty good and there wasn't any movement with the wire inside the lug, or shoudl I be lookign at the one bad battery first?