It was a new idea. Spend money. Seriously, it takes forever to fill a battery. Just buy a funnel for 0.99 cents and save yourself the hassle. I will never use that. Water comes out very slowly. What I think. If you're just "charging" the battery, that's fine. But I have 4 batteries in my golf cart, 6 cells each. That's 24 times I have to wait. and wait. and wait. I used it for three holes and said what's the point? Don't you want to spill some water? I'm not trying to be negative, I just fell for the gimmick, that's all.
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