Car batteries

What's behind our car battery Ratings?

Experts at our National Testing and Research Center tested 62 models in car batteries to see which ones perform best.

We look for:

Overall score
Overall score combines life-test performance, reserve capacity, and cold-cranking-amp (CCA) performance in our tests; scores are relative to others in their group sizes.
Life
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 score.
Reserve capacity
Reserve capacity estimates how long batteries can run a car if the charging system fails.
CCA
CCA performance reflects voltage at our load of half the average claimed CCA for each group size after cranking for 15 seconds at 0º F. We charged batteries at the 14.5 volts that vehicles typically supply, rather than the higher voltage that manufacturers use. Batteries charged at the lower voltage met BCI voltage standards for a fully charged battery.

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Recommended car batteries

Recommended car batteries are standout choices with high scores. They include CR Best Buys, which offer exceptional value. When narrowing your choices, weigh features, price, and attributes that matter to you.

Recommended car batteries

Car battery buying guide

To find the car battery that is right for you, read our expert advice on which features to consider and how to find the best value.

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Why shop here?

In addition to finding Ratings for the latest models, you can now shop online using an ad-free interface where you can buy car batteries in a safe-shopping environment.

Learn more about our Price & Shop program

The time to consider purchasing a new car battery is not when it leaves you stranded on a cold, dark, and stormy night. But you might not even know your car battery is on its last legs until it's too late, because modern ignition and fuel systems can start a car with a minimum of cranking. If you're looking for information about car batteries, Consumer Reports is your best resource. Consumer Reports’ car battery reviews will give you honest buying advice that you can trust. Use our car battery buying guide to discover which features are most important to consider. We also provide unbiased Ratings and car battery reviews to help you choose the best car battery for your needs.

Ratings & recommended car batteries

Car batteries (62)

Recommended models are standout choices with high scores. They include CR Best Buys, which offer exceptional value. When narrowing your choices among models, weigh performance, features, price, and attributes that matter to you, such as color, size, or style.