For those that dont need to carry weight, why run the Optima battery @ 38lbs? $187 racer discount.
I've been running this battery in my car for about 7 years @ 26lbs.
http://www.jegs.com/i/Odyssey+Batter...PC925/10002/-1
$180 with racer discount at Jegs.
http://www.odysseybatteries.com/battery/pc925.htm
Oddyssey is also a military spec battery sold under a different packaging.
I put my Harley trickle charger on it during the week. It cranks my 12:1 385 very quickly.