Some sealed batteries are still vented but don't leak liquids.

Many of the modern cars use a fully sealed battery with a vent hose on the battery top.. They don't have problems with rust in the car.

I ran a traditional sealed battery in the truck of my Challenger with a vented box and rust happened all around the box on that side of the trunk.


I am sold to get a fully sealed battery with a vent hose like modern trunk mounted batteries are in BMWs' and others.