Nigel, I think you just gave your age away.
Can I call you dad now?

 

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I started young

If you're 17 years old and called Melissa you can!

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No sorry, I'm twice plus that age, maybe I overestimated your age.
But I'll call you uncle Nige.
Is that okay?

 

I've been called far worse!

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Ahh....
nothing like a good bit of humour.

By the way, how do you reverse polarity charge a SLA battery without it blowing up?
that was the one thing about this post I never got.

 

With your fingers and toes crossed!

But to be more serious, I would suggest you have to completely flatten the battery, and then only reverse charge it gently.

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the point I was trying to make is, you need to be really good at what you're doing to do so without harm, so what is the chances of it happening.

Besides, should SLA batts. drain sufficiently, you chuck'em away, no questions asked.
So how would someone purposefully drain it to such a state that it can be reverse charged. I don't understand.
SLA is normally only trickle charged in any case to prolong lifespan.

 

hi arrie
I thought the OP said it was a car battery, 'wet lead acid' not a SLA.

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oops, you're right.

thanks for jolting my memory, had 2 hours sleep last night, mmmmm.....
that might be the cause.
Then again, it can be the alzheimers light.

 

"Alzheimers Light" ... ?

Is that one of these new alco-pops i keep hearing about ?

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It sure ain't Budweiser.

John

 

Sorry my spelling there should have given the whole thing away.
When you get old sometimes, you cannot remember things and basically become senile, an illness called Alzheimer's disease.
Well now, if you're a bit younger, and cannot remember things from time to time, we jokingly say that you have alzheimers light.
Probably only a South African thing.

The intention is not to make fun of the real disease as it's very serious, but forgetfulness can be bloody irritating.

 

Had to dig back a few posts...
As I recall it: We had a combine (grain harvester) with a generator (dynamo to Nigel) that had gone bad. The generator was replaced. As part of the process you need to hook the generator to a battery to polarize it. If you polarize it backward the + and - connections become reversed. The battery was dead when the generator was replace, the backward polarized generator charged it backward. The battery charged but not enough to work well. I think it went dead each night. Could have some of this wrong as it was 40 or so years ago.

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My 65+ friends call temporary forgetfulness "a senior moment".