- What's behind our Ratings?
Our battery-life test is based on a standard recently adopted by the Society of Automotive Engineers. Our test includes partially draining and then recharging each battery almost 3,000 times over a 10-week period. - We look for:
- Battery life performance
- Reserve capacity
- Cold-cranking amp performance
- Learn more
Recommended car batteries
See which car battery models offer the best combination of performance and price. We also identify models that are sealed and maintenance-free—a plus if your vehicle's battery is difficult to reach.
Car battery buying guide
If you're looking to replace your car's battery, our buying guide can help you get the right size and design for your vehicle, plus one that fits your climate and driving conditions.
How to jump start a battery
Follow our safety tips for getting the spark back in your engine.
Hot Topics
Essential car battery installation and maintenance tips to keep your engine running.
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Read reports on products, news and trends from Consumer Reports' Cars experts.
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. Once your car battery is two years old if you live in a warm climate or four years
old if you live in a cold climate, have it tested every year as part of an annual safety inspection.
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See also:
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Special Section:
Guide to car maintenance
