Shopping for a car battery? Read about types, features, and other must-know topics in our car battery buying guide to make an informed choice.

To help our members make a smart decision about replacing their car battery, Consumer Reports tests more than 100 individual car batteries in our lab every year. And not just once—in fact, we test ...

While the 80-20 rule provides a practical and effective approach to protecting your EV's battery longevity, it is still not comparable to the battery degradation that we commonly see with smaller ...