Learn something every day! Tom, you're right! But YOW! A muffin fan and hose would be a lot cheaper! $120 just to do one battery! Plus, they have their own drawbacks, as they ARE catalytic converters, and give off heat. In a fast charge situation, they could be ruined quickly if there was a lot of gassing. I suspect they would not fare well for an automotive application, but hey, one can ask questions of battery and charger suppliers. Googled the link with "battery cap catalytic". http://store.solar-electric.com/hydrocaps.html Supply is way behind demand, 'cause Katrina hit the manufacturer. Glenn Ford. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list