enireh
Senior Member
- Location
- Canyon Lake,TX
why does a 12 volt battery go dead if placed on the ground or on the garage concrete floor?
Interesting thing about that is it goes dead sitting on an old stump or your kitchen counter as well.
I believe it is because those that put it there, forget about it. Eventually the battery will die anyway. Could be the performance of it it was already on the downslope and that is why it's there. I put them on something so any acid does not contact the floor. It does not stop eating a hole in the floor.why does a 12 volt battery go dead if placed on the ground or on the garage concrete floor?
Interesting thing about that is it goes dead sitting on an old stump or your kitchen counter as well.
we were working on the heads, put the battery down in the afternoon and picked up the next day about the same time and the battry was dead and it was not so old I am looking for a scientific explanation Click and Clack said they'd have to look into it
we were working on the heads, put the battery down in the afternoon and picked up the next day about the same time and the battry was dead and it was not so old I am looking for a scientific explanation
I believe it is because those that put it there, forget about it. Eventually the battery will die anyway. Could be the performance of it it was already on the downslope and that is why it's there. I put them on something so any acid does not contact the floor. It does not stop eating a hole in the floor.
Working on the heads sounds like the hood has been up for a while. When was the last time the engine ran?
I'd heard similar stories, and that is what I feel they are.I've heard that old (and I mean older than you old, really old) batteries had a rubber case that would leak or discharge or some sort ill fate if stored on concrete, but that it's not an issue anymore.
why does a 12 volt battery go dead if placed on the ground or on the garage concrete floor?
(Did you test the battery before putting it down?)
The scientific explanation is that the battery was already toast and leaving it off charge (and slightly colder) make it dead. There is nothing special about concrete that suck the life out of a battery, other than cold.
the day before we worked on them amigo anyway, I was listening to Click and Clack "Car Talk" NPR and they were looking into a scientific explanation so I thought I'd inquire with the Holt gang and I get a hood/go fast response muchisimas gracias amigo
4) If a battery has sulfides on the plates and it is set down abruptly on a hard surface, the sulfides can break free and sink to the bottom, shorting out the plates and killing the battery. That may be one reason the myth about concrete prevails.
Would seem if the battery were actually in use in the vehicle the same thing could happen from hitting a hard bump in the road.
True the vehicle battery is somewhat protected by the vehicle suspension, you still get some pretty hard shocks to anything in the vehicle in some off road applications, or even the public county roads around here.:blink:I am sure it sometimes does, but the shock from a concrete floor is much worse than it would be from a piece of sheet metal over a spring and shock suspended car body with air filled tires.
What would you rather hit your head on? Try to break a cue ball by throwing is as hard as you can on the battery box. Then try the same thing on a concrete floor.
Now leave same battery somewhat loosely laying in a bed in a pickup truck and it may bounce enough to get some more shock to loosen things on the plates.
The crystals that form on the lead plate are lead sulphate, not lead sulfide. Once tightly crystallized they are essentially non conductive (which is why they kill battery capacity when they cannot be removed during recharging.)...
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4) If a battery has sulfides on the plates and it is set down abruptly on a hard surface, the sulfides can break free and sink to the bottom, shorting out the plates and killing the battery. That may be one reason the myth about concrete prevails.
The crystals that form on the lead plate are lead sulphate, not lead sulfide. One tightly crystallized they are essentially non conductive (which is why they kill battery capacity when they cannot be removed during recharging.)
On the other hand the lead and lead oxide active material in the plated can be broken off, to fall to the bottom to short out the cell. Lead oxide is especially likely to break off if the battery is consistently and severely overcharged.
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