My new Noco Geneus2, car battery charger, that arrived today. I have a then new 2006 Mustang, and drive it every couple months, the past 4 years. I can leave this charger on 24/7, with no worries having a dead battery. It sure beats having a portable battery charger and getting that out, which does work. With this new charger, I have no worries, as keeps the battery maintained 24/7. Not ready to sell my Mustang, just yet. Maybe next year. lol Been retired since 2008.