 The basic things we do to maintain them won't really change, and that includes maintaining your 12-volt battery and changing it out when necessary. Learn more about AGM batteries at Autobatteries.com. That's Autobatteries.com. Fox News Commentary. The more we learn about the assassination attempt on Donald Trump, the more maddening it is Secret Service Director Kim Cheadle has not resigned or been fired. I'm Tomi Lahren. More next.