If the voltage reads 12.74 v or lower for an AGM battery sitting for 2 hrs after charging it’s is on its way out. And I would not trust a battery for a bike past 3 yrs anyway.
Examples here on the forum and my own personal experiences tell me that hot environments (Arizona, South Texas) are brutal on batteries. While a person living in that environment might not trust a battery over 3 years old, I live further north and generally begin to lose faith in batteries when they reach 6-8 years. If they haven’t failed at 8 years, I replace them proactively. Many have gone that long. The point is, there are, as ste7ios said, many variables impacting battery life. Because of the variables, the battery thread could become a close relative to the oil thread.
That being said, the OP does live in Florida, so his battery life could be on the shorter side of average.
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