Sorry I meant no disrespect, I managed and drove for a major battery manufacturer and had to attend bi anual seminars in PA. Years ago the physical make up of the plastic cases did not allow the battery to be left on concrete, thus causing the battery to discharge. I was told that was back in the days of dry batteries. There are a couple of things to remember so you can prolong your acid filled batteries life. Only add WATER after you charge your battery, and only fill it 1/4" above the screen. When the battery discharges the acid is drawn into the plates, if you add water before you charge them during charging the acid will come up to the battery cap or spill over. Battery waterers are fine, they were mainly made for large forklift batteries. Keep your batteries clean and dry corrosion on the terminals or acid leaking out of the caps should not happen, if there is too much acid in the battery after charging it take it out. Monitor each battery with a voltmeter occasionally after charging, if the voltage is below 5.5 V it is time to think about changing it. If you are going to purchase a 6 Volt battery always check the date code if it is over 6 months old stay away. A 6 volt battery has a life span of 6 months from when it was filled and originally charged from the manufacturer, which means that it was shipped to the store after 3 months rotated out and charged and shipped again. After it is rotated 3 months later the distributor after looking at the heat stamp on the battery must brand the battery with a heat stamp SECONDS. Car batteries are 1 year from the heat stamp, 2 6 month rotations. Don't misunderstand that a battery that is a seconds will not last as long as a new one, I am just saying not to pay full price for a battery which doesn't have a full charged or is in the process of being sulfated from lack of charge. I hope that this helps, regards Joe