How long does an AGM Battery Last?
We purchased an '09 TT a few weeks back. The battery is a 4D Powerstride Lifeline AGM that seems to be working well and is clean. I have no idea when it was installed, but I've got to assume that it'...
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I have 12 years old Lifeline AGMs in my RV and they are still at 90% of their original capacity. I've checked them several times with an amp-hr meter. We used the RV about 100 days a year but don't boondocks a lot.
