Join Date: Apr 2006
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Re: Stupid state of charge question
"Please don't do this unless you want lots of holes in your clothes..."
So it ain't just me!
And considering that you need to let batteries stand so the electrolyte can equalize, which is the exact same process and reason that you let them stand before using a voltmeter, what a pointless invitation to ruin. Especially if that one drop that splashes off the hyrometer gets in your EYE because, of course, you do wear eye protection whenever you're screwing around with acid, right?
Barquito, you can get a battery deep-cycle tester under $50 on Amazon, it will tell you roughly how many AH in capacity are left in the batteries. Or just get a CALIBRATED multimeter, and read the voltage. If you've just been charging, throw a load on 'em for two minutes before you read the voltage. Will that be perfect? No, but it will be perfectly adequate for your needs.