[dadspet]

Good information, a few dealers said these systems were trouble prone and could cause battery problems by not filling them correctly.

I didn't get one and have been filling my batteries with special water battery filler (about$15 or so from dealer) that you put into the battery hole and its supposed to stop filling the battery at the right level. Well thats almost right but I kept trying to get the last drops of water in and over filled my batteries. They looked oj after I filled them but after running the cart some they leak over my garage and driveway a bit. So perhaps the message here is you need to be careful with whatever method you use and if you use a manual battery filler stop when it first indicates its done filling.