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Testing charging car & mower batteries?

1470 Views 8 Replies 8 Participants Last post by  Tony bachler
In the basement I have over 1 dozen car and mower batteries on the cement floor along a wall. I need to test them to see which ones are good, bad or chargeable. I have an automatic charger and an electronic voltage tester. Should I just test each one as they sit or charge first or? Some have been in storage for over 5 years. Where they sit on the floor is on one side of the landing of the stairs. On the opposite side of the stairs on this same basement floor are the water heaters which were new about 3-5 years ago. I'm concerned about vapors creeping over to the pilots on the water heaters. Maybe I could have a fan blowing on the batteries as they charge to dissapate the vapors?
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The concrete deal is nonsense. What CAN help discharge a battery is storing them in a warm place with dirty crud on the top. The crud and become conductive, and drain the battery. The warm environment allows chemical action to "self discharge."

Even though batteries don't output as much power when cold, the best way to STORE them is to charge them up and store them cold. Keeping dry cells in the fridge is no myth.

I would guess that if you have a few batteries over 5 years old, most of them are "about gone." I sure would not put much energy into trying to keep them up.

They should really not be charged or stored in a basement, but rather a ventilated ground level shed. Batteries DO occasionally explode without much apparrent reason. Not pretty in your basement.
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