I buy the Sears Platinum when they go on sale. The 31 size has the same specs as the Odessey, same size, case, ratings. Some say that they are not the same so I dunno, but I've had good luck with them. I wanted AGM because they are in the console and I was mainly concerned with shock loads. They charge up real fast which is nice also. I've also read, they like to be charged at 40 amps or more to make them last. My Yamaha F115 doesn't quite make that but so far so good. My Suzuki 225 EFI didn't make 40 amps either but when I sold the boat, both Sears Platinums were doing well after 2+ years.
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