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.

Automotive technology has advanced at ludicrous speed, yet modern automobiles still use battery technology that originated in the early 1900s. We should clarify we’re not referring to the battery ...

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.

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 ...

AGM is a relatively new technology compared to traditional lead-acid. AGM batteries no longer require daily maintenance like adding distilled water; however, they have many other disadvantages of lead ...