Hey guys, my Mercedes CLA's OEM VARTA AGM battery has been getting worse over the past 3-4 months. 4 months ago it used to hold atleast charge ...

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 (Absorbent Glass Mat) batteries, known for their longevity, low maintenance requirements, and capacity to deal with deep discharges, have emerged as the go-to choice for contemporary automobiles ...

Consumer Reports tests batteries for life, reserve capacity, and cold performance. Some batteries perform admirably, but ...

Unlock to see our ratings and compare products side by side Life test measures how a battery endures repeated charge-and-discharge cycles at hot-climate engine-compartment temperatures. The more ...

Cranking over the high-compression mass of a diesel engine takes a lot of stored energy to accomplish. This is why diesel trucks use two high-cranking-amp batteries to get the pistons pumping. Most ...

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 ...

This article was updated with new information in December 2025. A vehicle’s performance starts–no pun intended–with its power source, making battery care one of the most important—yet ...