Thanks; I forgot to mention that.

"Doug Dotson" wrote in message
...
These voltages are for liquid lead-acid batteries. Gels and AGMs
are somewhat lower. My AGMs rest at 12.6v when fully charged.

Doug
s/v Callista

"Garland Gray II" wrote in message
news:IFEQb.11797$dd6.309@lakeread02...
A battery test in an old Ample Power catalog was to charge to 14.4 volts
and
hold it there for an hour. Let it rest overnight, and then retest.
12.8 v & higher=good
12.6 to 12.7v=marginal
12.4 to 12.6v=very poor
less than 12.4 v=worthless

"Rick & Linda Bernard" wrote in message
...
Anyone have a good way of testing 12V deep cycle batteries?

What I was figuring on doing was using a 50watt 12V lightbulb and
measuring
voltage with time. The only problem is that this may take a few
hours.