Traveling in my 06 to Pa. stopped to fuel and had funny smell around truck??? Next stop same smell, rotten eggs... ... ... ... open the hood to find the passenger side battery smoking and acid coming out of the vent holes!!! NOT GOOD... ... but not bad for 7 yr. old batteries! CARQUEST close by, stopped there, great guys, installed 2 new batteries and off to Pa. I went! Just letting ya know!! Thanks for all the info.