I, too, have two blue tops and have been very pleased with their performance. IMHO they are worth the extra $$. The Optimas use a spiral plates design with the AGM (acid gel mat) in between, so you get a lot of plate surface area. The mat also acts as a vibration absorber and prevents the plates from contacting. AGM tend to last longer than liquid batteries, usually around five years average.
Ron
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2011 Alpine 3640RL (Beauty)
(Gone! Now replaced by Beauty3)
2016 Ford F-450 (The Beast)
Diesel 4x4, DRW, LB, CC
Comfort Ride Hitch
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