Posted for "Bryan J. Burr" <bjburr@mwheli.com>:

I use the Concorde battery in my Kaman K-MAX helicopter.  We fly 1800-2000
hours per year and average 2-3 turbine engine starts per day.  We also
operate the a/c electrical system up to 30 minutes per day without the
engine running (only on battery power).  We find the Concorde battery is
replaced every 18 to 24 months.  I definately would recommend their product
for a GA airplane and would expect very long life.

Bryan Burr
Mountain West Helicopters