Posted by HenryO on July 13, 2013 at 07:17:36 from (24.166.66.25):
In Reply to: old battery's posted by bison on July 12, 2013 at 22:48:45:
I ran a set of group 30 gel batteries in my 47ft boat for 12 years and then changed to glass mats. There were 6 gel cells and people in the marina installed them in their boats after I took them out. I believe it depends on the cycle life and the charge as applied to the batteries. Batteries seldom used can be kept for years if not cycled every day or more tan once a day. Optima's glass mats can be discharged to nothing, left set for long periods of time and then recharged to full capacity. I used commercial group 30's to replace the gel cells and I'l bet they are still gong strong 15 years later.
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