Originally Posted by
onehundred80
I have an AGM battery and it has vents. You can use an AGM upside down with the vents down because the acid is contained in the matting.
Are you talking about the pop off / one way that is built into a agm battery that are set to a certain psi that is a safety incase of overcharging so they do not blow up if over charged.
Completely different than a vent.