I should have said "other than Lifeline brand" :) I don't think I have had my question(s) answered.
I recently went back to a bank of four Wet 6s as my battery bank. I had AGMs last time, the 8D and two of those 27s Stark brand. I am hard on batteries, but I did the 0.5a/100AH faithfully, and all that.
The 8D couldn't take it, and the 27s were down to 80% and 75% capacity after three years according to my 20 hr rate tests where I try for 10 hrs and 50%.
So the AGM 27 so-called deep cycle lasted me about the same time (three years) as my set of Walmart 27DCs did. (but with a lot less hassle charging them!) I had way better luck with second hand T-1275s (my favourite batts) and wet 6s in the past, so I am back to what I know and trust.
However, the question remains, if you did want AGMs and not Lifeline, how can you tell from the specs if they are proper deep cycle batts?
Does lead-calcium plates mean they are not deep cycle in real life? Does "cycle use" mean only shallow cycling allowed?
