 As different and complex as these vehicles have become, 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. This weather report is sponsored by Bell House Medical, your local leader in stairlift to barrier-free walk-in shower installations. See them at MasterGrabBar.com.