On 11/13/04 12:05 PM, "Jeff at Vanagonparts" <jeff@VANAGONPARTS.COM> wrote:

> IIRC, 12.3V for a battery "at rest" (i.e., no load) indicates a 50% charge.
> A fully charged battery should read 12.6V when at rest.
> 
> Cheers,
> 
> Jeff
> 
Depending on mfr specs and temperature and type of battery. I have found
this to vary quite a bit.  For example on one table I am looking the fully
charged at for 80 degrees F.  why that temp I don�t know but that is what
the tables are zeroed for.
A low maint battery assumes a 12.65 full charge
Certain open top lead acid assume 12.85 full charge
Some gas mat and gel batteries are considered charged at 12.3 volts.

http://www.uuhome.de/william.darden/index.htm

This is a good info site on batteries with links to a lot more.

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jimt
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