It's measured as cold cranking amps, or CCA, or the amount of near-instant amperes a battery can deliver at 0 degrees Fahrenheit. Cranking power is essentially the large jolt of electricity needed to start the engine. It's simple, and it's the only way to be sure."Ī car battery needs two things: cranking power and reserve capacity. A lot of retailers will do it free onsite. If your battery is 3 years old or older, get it tested annually. "Modern batteries tend to continue cranking instantly until they won't crank. "It used to be easier to tell when a battery was going bad," says Rebecca Conway, senior director of marketing at Clarios (formerly Johnson Controls power), the world's largest 12-volt battery manufacturer. A few recently manufactured batteries can still behave that way, but most modern batteries will continue cranking normally - until they won't crank anymore. Ten or 20 years ago, a battery's decline would progressively show itself in one obvious way: increasingly slow and labored cranking or engine starting, particularly during a chill. Yet the conditions noted above are relatively uncommon, and their absence doesn't necessarily mean a battery is healthy. An obvious crack, bulge or warpage in the battery case is a pretty good sign you should be looking for a new one. Some cars will flash the "check engine light" if the battery is weak, though in most cases you won't know what that light exactly means without access to an OBD II scanner. Excessive corrosion around the post and battery cable connectors probably means it's leaking acid. There may be signs a car battery is on its last leg. One-year full replacement warranty, but with proper care and feeding, it should keep you rolling for years. Venerable capped lead-acid tech delivers excellent cranking power. Guaranteed to never drain below the point where it can't start your car. Pioneer in lithium portable power storage brings its technology to 12-volt car batteries. Should power headlights and a loud car stereo for more than 3 hours with the engine off and still safely recover.īest car battery for hot and cold climatesĮxcellent balance of power and durability in extremes of both heat and cold, but mediocre reserve capacity. Three-year full replacement warranty.īalanced performance at a reasonable price, just like a good working pickup.įrom a company famous for race car batteries, Braille's less expensive products deliver the best power-to-weight ratios in the consumer market.īest car battery for a lot of accessories Just press the button on top of the battery, or use the standard key fob you can leave on your key ring, and voila! The battery you thought was dead quickly fires its host machine.īlue blood AGM rated highest among dozens tested in Consumer Reports labs, with "no discernible flaws."Ĭonventional lead-acid outperformed batteries costing two or three times as much in lab tests. It always leaves enough juice for a steady burst of cranking amps. If you forget the interior light when you get to the airport, the chip will essentially shut down the battery before it's completely drained. Slickest of all, the Re-Start should never go dead, and you should never, ever need a jump. It's warranted for five years, with the first three full replacement and the last two prorated. It all helps to extend battery life, and Antigravity says the Re-Start should last seven to nine years, depending on climate. BMS prevents overcharging and overdischarging, and its thermal management system balances cell use to optimize operating temperature. The tricks, after the lithium chemistry, start with a chip-controlled Battery Management System. They're available in many automotive group sizes, with multiple choices in cranking amps and reserve power. The Antigravity Re-Starts aren't cheap, but they're exceptionally light (all under 20 pounds) and loaded with high-tech features. Antigravity was a pioneer in lithium technology for portable jump starters and energy storage, and it has expanded into powersports and automotive batteries with its Re-Start series.
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