![]() ![]() Our biggest complaint is that it must be connected to a battery for the display to work. But it was possible and gave us useful information (including that wherever our short is, it's not in the charging system). The battery health ripple test requires starting the car and holding the RPM at 2,500 for five seconds, which would be a lot easier with two people. We then tried the cranking and charging system health functions in a Mazda with a flat-plate AC Delco Gold battery. Getting a battery health reading was easy. During several rounds of testing, we noticed that the display gets sluggish in colder temperatures. The opening screen shows a small voltage readout at the bottom, and then you have to select your battery technology, in this case, AGM spiral wound, from the following screen. We hooked up a BT100 Car Battery Tester to one of our Optima Yellow Top test batteries (note: you must connect it directly to the posts), and the display came on immediately. To learn more about the best car battery testers, refer to our table of contents. Some testers are easier to use than others, while some offer more comprehensive data and other features, such as the ability to test your car’s alternator. Plus, we think they’re fun to use, especially if they have a display, and it’s not hard to learn a little more about things like internal resistance and cranking amps. ![]() Just remember that some functions, like cranking, are a lot easier with two people. It’s also a great tool if you’re buying a used car, used battery, or have some lying around your garage. When a good replacement battery can cost hundreds of dollars, it’s a small investment to give you lots of warning if a battery starts to go bad, and gives you a chance to put it on a charger with a repair cycle to buy a few more months, too. Using the best car battery tester, like our Editor’s Pick, can tell you more than just “good or bad.” They can give you a real insight into how your battery charges, cranks your engine, and what it’s internal health is like. This is great if you only use your car a few days a week, or if it’s going to be parked more than a week like when you’re on vacation. If you’ve started working from home and your car is sitting longer than it used to, you can help make your battery last a lot longer by putting it on a trickle charger. Skip the pointless troubleshooting, this one trick will quickly tell you if your battery is OK or if it needs to be replaced.Ĭar batteries only last so long, usually about 5-8 years, but slow starting doesn’t mean yours is going, it could just mean it needs some help. Hot-Selling Products Frieling 5002 Electric Low-Fat Fryer / Maraehan Jackgold Air Fryer Oven / NUWAVE BRIO 4.5-Quart Digital Air Fryer / PowerXL Vortex Air Fryer Plus 5 Quart / George Foreman GHFD6800B Twist N Crisp Air Fryer / Flexzion Electric Air Fryer Cooker 1400W, 5.8 Quart (Black) / Emerald Air Fryer w/ Digital LED Touch Display 1400 Watts / SMALL FISH Air fryer Yellow Oilless Oven / SFPY Air Fryer, 4.5L Air Fryer Oven with 6 Pre-Set Functions / Brentwood Select 3.4Qt Electric Air Fryer / TOYTEXX and DESIGN Intexca US Electric Mini Portable Compact Washing Machine / Avanti Portable Compact Washing Machine for Clothes/Laundry / KVZVK Portable Mini Washing Machine / Avanti STW16D0W Portable Washing Machine / Bonnlo 26lbs Portable Washing Machine / Tiptop Home Portable Washing Machine 10L Mini Washing Machine / LEMY Mini Baby Washing Machine Portable and Compact Laundry Washer / ECPro Foldable Mini Folding Clothes Washing Machine / SSYY Portable Washing Machine Mini Foldable Washer / DYRABREST Portable Washing Machine / Skullcandy Sesh Evo True Wireless Earbuds / TOZO NC9 Hybrid Active Noise Cancelling Wireless Earbuds / Tribit IPX8 Bluetooth5.0 Deep Bass Bluetooth Earbuds / kurdene S8 Pro Bluetooth 5.2 Earbuds / Beats Studio Buds True Wireless Noise Cancelling Earbuds / TOZO A1 Mini Wireless earbuds Bluetooth 5.There’s only one way to answer the question, “Is it my battery, or something else” when your car won’t start: Hook up the best car battery tester and get a readout of what’s going on. ![]()
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