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Testing charging car & mower batteries?

1484 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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What amp output charger is it? They should have been periodically charged every three months to keep them healthy. If any one has not had a charge in over six months time the likelihood that it has much good left in it is greatly diminished.

Not knowing amp output of charger and amp capacity of anyone battery not much I can tell you.

Storing on concrete in itself means nothing.

I would sit the battery being charged outside, not knowing what else your doing in the basement. A shorted cell or seriously overcharged battery will generate an outsize amount of hydrogen(explosive) gas.
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