I've had two AGM batteries and they were good, always held a charge and then just suddenly failed. Even with a jump start the engine wouldn't run properly, they would idle but not take much load when you drove off without dying.
Never had that problem with a traditional lead acid battery.
Have I just been unlucky with some sort of internal battery short in the AGM batteries I've owned or is there more to it.
The reason I ask is that I'm using another sealed AGM battery that's now about 9 years old,
that's performed flawlessly holding enough of a charge even after a couple of months disuse to always start the car. I just don't want to be left stranded with sudden battery failure.
Never had that problem with a traditional lead acid battery.
Have I just been unlucky with some sort of internal battery short in the AGM batteries I've owned or is there more to it.
The reason I ask is that I'm using another sealed AGM battery that's now about 9 years old,
that's performed flawlessly holding enough of a charge even after a couple of months disuse to always start the car. I just don't want to be left stranded with sudden battery failure.