Since we're heading the the islands this spring, I took a proactive approach on our 5 year old optimas. I brought the batts to an auto parts store to have them tested under 'load' and yup - the guy tells me they're bad....
So, though they 'seem' to work fine (I regularly use and charge them & they float at 13.3v), just how accurate is the load test part stores perform???
Loads tests are fairly accurate. If the voltage starts to drop in less then a minute, the cells are thin and will not last too much longer.
If the batts are more then two years old I would not depend on them for a long trip. It's cheapinsurance just to replace them. Sell'm to one of your buddies that stays at the dock most of the time.
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