Thanks - I did not think to look at the ACR while on the water to see if the LED's were lighting up. I do see that the ACR will not charge when the one battery gets below 9.9 volts, so clearly it would not have charged it last trip while the battery was below that. I am just not sure why the battery dropped that low. I charged it overnight and it came up to only 12.06 volts after 12 hours, so I think it is the battery. Thanks for the help!
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