* Larry wrote, On 5/30/2007 4:50 PM:
navti wrote in news:1180506549.946816.47150
@g4g2000hsf.googlegroups.com:

They showed 12.69V

Dead cell. 13.6 to 13.8V is "normal" on a fully charged battery....

This is total nonsense and mis-information. Once the charger is
turned off, and the surface charge is "burned off" the voltage will
drop to around 12.7V, give or take a tenth. This is the norm for
flooded batteries, but there is more variation for gel (which is often
a tad higher) and AGM. The float voltage used for AGMs is usually
rather low, around 13.2, so claiming that it has to be at 13.6 to be
fully charged is nonsense.

Here's a data sheet for Lifeline AGM batteries, one of the major
brands in the USA. You can clearly see the "Open Circuit Charge" for
100% charge is 12.8 Volts.

Note also, that as I mentioned in a previous post, AGMs can be
equalized to restore some lost potency.

http://www.lifelinebatteries.com/mch...procedures.php