KINGBOLENBM520 6V 12V 24V Car Battery Tester, 100-2000 CCA Automotive Load Tester Accurate Digital Auto Battery Analyzer Cranking and Charging System Tester for Cars Trucks SUV Motorcycle

Price is right, tried it on a brand new battery and it said is 100%. Money well spent.

I recently received the KINGBOLEN BM550 Car Battery Tester on my car. As mentioned, this tester is compatible with 6V, 12V, and 24V batteries, supporting a wide range of types including regular flooded, GEL, and EFB batteries, making it suitable for cars, trucks, and more. It’s a practical tool that quickly displays the battery’s State of Health and State of Charge, as well as conducting internal resistance and voltage tests. It has a clear 1.8-inch HD screen to show the data, making it easy to understand the battery's condition. One of the standout features is the reverse connection protection, which prevents damage if the wires are accidentally reversed—an excellent safety measure for long-term use. The tester is plug-and-play, requiring only a correct connection to the battery to start working, whether the battery is in or out of the vehicle, or even if it’s dead. The KINGBOLEN BM550 is straightforward to operate. It’s a perfect tool for DIY enthusiasts, garages, and car factories, offering peace of mind by helping to avoid unexpected battery failures.

May not be pinpoint accurate; but delivers a good idea of battery health. This info along with the battery's age will help determine if replacement is warranted. Used on 3 vehicles so far, so can't speak for durability.

The media could not be loaded. This is a fantastic battery tester. It will definitely save you a trip to the auto store to get your battery tested there. This is a very simple to use. It is powered by your car battery. So there is no on and off button. When you connect the cables to your battery the tester will automatically turn on. Following the instructions you will need to pick your battery type which most likely will be 12 volts if you're in America testing your car battery. Then you need to check your cold cranking amps or CCA. I recommend you make sure you know what your CCA is prior to starting this so you can input it in right away when you are prompt. Mine is a larger battery because I drive a truck so it's 710. When I tested the battery it ran at 516 on the final run. This is lower than the 710 but considering that my battery is from 2018 this is fairly accurate. It may fluctuate if you keep on testing it as your engine is off so the alternator is not charging your battery. So every time you run a test it drains the battery just a little bit more. To get an accurate reading I run about three tests and then get an average. I love the digital display which is great. My old battery tester was analog that just had lights that would light up. This gives you an actual number rating which is fantastic. The cables are quite long so you don't have to be hunched over the battery risking accidental cross wires and possibly shocking yourself by accident. The clamps are pretty sturdy with the spring strong enough to withstand a light tug and won't come off the terminals. I like the fact that if you accidentally connect the negative to the positive and the positive to negative it will not ruin this tester. It will just blink to show you an error. All you have to do is just reverse the cables and put them on the correct terminal. This is definitely a must-have for the do-it-yourself mechanic. If you have old batteries this will give you a very good idea of whether you can save that battery or you need to complete replacement. It's small enough to keep me your car which is great because that's where I'm going to keep this one. And the price points you can't beat it.

Unbelievable! This gaget works really well! I was skeptical at first when getting this product, I was thinking that.... it's not going to be very accurate. It's actually very very accurate! You can see in my picture that I compare the voltage with my high dollar multimeter. The reading came out exactly the same! The other features that I've noticed that it's automatically reading the CCA. It seems like it was communicating with the battery and tells you all of the battery specifications. It's also can do 6 volts as well.The unit itself is not big at all! You can put it in your tool box with ease! It is very easy to use and straight forward.So if you want something that can read your battery voltage and find out the specs for your battery, you need to get this unit. Well worth the money spent! I highly recommended for your garage..... it'll come in handy.

First off, I'll say it does have two things I'd like to have better. The backlight on the screen is weak, especially working in the sun it's hard to see. I also think it would be better if this had an internal battery, as it depends on the car battery for power.However, this is a functional, easy to use tool to have around. I love that it comes in a carrying case. It's going to more portable than my analog tester. In my comparison against the analog tester, it was accurate in it's measurements.It will do a battery health test, charging test, and starting test. Would I buy it again? Yes - but I could have survived fine with my analog tester only. So I will recommend this if it's your first tester, but if you already have an analog unit, you're probably fine without.

This small and portable battery tester is pretty good. It automatically turns on when attached to battery terminals.As long as the battery is not too old, it can tell if the battery is good, normal or bad. I tested a very old battery and this gadget will not turn on. Easy to read and use, comes with easy to read and follow instructions . Affordable and hopefully it lasts a long time

Consistently generates random values testing batteries. Brand new Optima tested at 0 percent life as pictured. Freshly charged known excellent battery tests as "Poor" and 10 percent. Voltage readings completely random; will display under12 volts when multiple meters put the battery at 13 volts. Tried AGM and FLA batteries of all sizes and the only thing consistent even one reading to another is that this battery tester is a complete waste of money and time. Inaccurate and unacceptable.

Pour vérifier les batteries solaires c,est merveilleux

Très bien fait et très pratique

Para los que no somos profesionales, su uso resulta intuitivo, sencillo y eficaz. Me ha servido para verificar el estado de la batería de mi coches y prevenir sorpresos, pudiendo adelantar el reemplazo de la batería comprobando periódicamente su estado.

Facile d'utilisation et précis. Attention à la toute première mesure qui est totalement fausse, après, c'est bon.

Un tester per batterie auto è uno strumento essenziale per chi desidera monitorare lo stato di salute delle batterie da 6V, 12V e 24V. Questo dispositivo permette di verificare la carica, identificare eventuali problemi e garantire che le batterie funzionino in modo ottimale.Ottima la facilità d'uso, la compatibilità con tutte le batterie che ho provato e portabilità estrema in quando sta' in una normale tasca dei pantaloni.