On Mon, 16 Jun 2008 08:11:06 -0500, Geoff Schultz
wrote:

You should also learn that you shouldn't deep cycle any batteries. I try
not to have mine drop below 12.3V and typically keep them at 12.5V and
above.

They should last just about forever with that kind of tender loving
care. We routinely cycle our inverter bank of 4 golf cart batts down
to 11.8 or 11.9, sometimes even lower. At 11.6 they are at about 50%
and I try to never go lower than that.