 Claris estimates that out of the 1.7 billion cars expected to be on the road by 2040, up to 50% of those will be some combination of full, mild hybrids and electric vehicles. This shift will require a lot of change, not the least of which is having enough charging stations to make both daily driving and long trips practical. 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.