I know 2 things to be true. AGM are the only thing I will run due to the non spillable nature which keeps acid away from stuff I tend to like. AGM are not the tiniest bit forgiving when it comes to being left to sit in a discharged state. If you miss that it ran down and sat for even 24 hours, you're likely going to need a new one. If you are one who needs to let a battery sit for a few weeks at a time, get a good maintainer on it.
In your experience how long is too long to have an AGM sit without a maintainer on it?
