Servicing absorbed glass mat (AGM) batteries isn't difficult, but the sophisticated AGM design—which is becoming more popular—does require the proper equipment and a little care. Here are the key ...

Cars with start-stop functionality use specialized start-stop batteries, which have better performance. Of course, these ...

An AGM battery should not affect radio operation, so check connections and perform a hard reset. A "miracle" car spray promising six months without washing is unlikely to work on heavy dirt. A faulty ...

An AGM battery, or absorbent glass mat battery, is essentially a more advanced version of a lead-acid battery. There are differences between AGM and standard lead-acid batteries, one of which being ...

This article was updated with new products and information in September 2025. A vehicle’s performance starts with its power source, making battery care one of the most essential—yet ...

Our latest tests show that shopping for a car battery by brand name alone can be a big mistake, both in terms of performance and in cost. But our latest Ratings make it easy to find the best one for ...

Boat batteries are the heart of it all. Whether used to power accessories or simply to start an engine, not too much happens aboard most powerboats without a battery. In today’s marketplace, boat ...