In article ,
whisky-dave wrote:
Sadly, voltage is no real check for a lead acid. You need to measure
its capacity in amp.hrs. No real point in keeping a thumping great
100 amp.hr battery if it's well down.

I thought the only way to estimate the charge in a lead acid cell was to
test it Specific gravity or similar with a hydrometer, well this is what
I was told at school when given the job of charging their lead acid
cells for physicas experiments.

Lots are 'sealed' these days. Luckily you can get an electronic tester
which gives a direct read out of amp.hrs. Not cheap, but a decent battery
place should have one.

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*Why do we say something is out of whack? What is a whack?

Dave Plowman London SW
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