Golf carts have long used deep cycle batteries wether 6 or 12v. Floor machines, fork lifts etc. also use deep cycle batteries usually 12 v. So the common denominator is deep cycle not golf cart. You can find 6 v in standard battery sizes at some super stores. Or you can call one of the quality deep cycle manufacturer's distributor and buy one or more that way. There are quite a few cheap 6 v golf cart batteries and they are just that cheap. If you want a good deep cycle buy a good brand.
__________________
|