I think you are right. I also saw similar data for FLA batteries: 1,000 cycles at 50% and 500 cycles at 80% DOD. I use my batteries a couple of dozen times each year. At 80% DOD I will have a twenty year life from them. Now I am not expecting twenty years, other things will get them, but it does put the old 50% rule of thumb to bed.
David
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