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 ...

Cold weather battery care helps prevent freezing, sulfation, slow charging and winter no-starts as temperatures drop.

While they all share a basic common purpose, car batteries are not universal. There are many kinds of car batteries, and you'll want to make sure you have the right one for your vehicle. The most ...

Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more cycles endured while maintaining a higher voltage, the higher the ...

The DieHard H8-AGM is part of the Car Batteries test program at Consumer Reports. In our lab tests, Car Batteries models like the H8-AGM are rated on multiple criteria, such as those listed below.