KINGBOLEN BM550 Plus 6V-24V 100-2000 CCA Car Battery Tester, Voltage Waveform Analyzer for Cars Trucks SUV Motorcycle

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.

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

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.

Great little device to see the voltage and the cold cranking amps of a 6, 12 or 24 volt battery. It is highly affordable and a great addition to any home mechanic's toolbox.

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.

We all know the old style of checking battery life that involved putting an eyedropper in each battery cell. Ugh. This replaces it with something that is far easier to use.It was easy to quickly select the CCA (cold cranking amps) as that is printed on the top of every automotive battery and read the voltage, battery charge, and battery life. I did not experience any of the problems others noted and have used this on half a dozen vehicles as well as multiple readings on each.HOWEVER, while voltage and battery charge are accurate (based upon using a voltmeter and hydrometer), battery life is computed and its percentage reads low WHEN the battery is NOT fully charged. In fact, it can read very low. Once the battery is fully charged (95% or higher), only then is battery life accurate.Other than that one usage warning, I would recommend this product.

Have been using this Battery tester for about a month, found to be a very accurate battery tester at a great value. This is also a great diagnostic tool for checking starting and charging systems.

The media could not be loaded. I run an automotive repair shop and recently lost my battery/electrical tester so I looked for a quick and easy replacement Until replacing it with a more expensive tester. So when I got the tool, my first thought was, it was not gonna be very accurate, but to my surprise, this tool was extremely easy to use for testing batteries and very accurate!! It also test the starters and alternators for load/ripple. Absolutely amazing deal for the money. Testers that do this many features typically run upwards of $150 and if you want printer with it, obviously it would be that. My only complaint would be that it feels very light and a little bit flimsy so if it fell on floor It would possibly break easily. Lastly, the complaint I have is for the screen. When using outside on a sunny day, there is a lot of glare and it’s very hard to see but if used indoors, it should not be a problem. It would be nice to have some sort of screen or be able to turn up the brightness perhaps. Other than that less than $50 I don’t think there’s anything Anyone could complain about this thing is fantastic and very quick!!! I’m thinking of keeping this in my shop for a bit just to Perform. I’m surprised. I’d rate it 4.5/5

J'ai tester plusieurs batteries avec que je conaissais déjà l'état pour voir si sa fonctionnait bien et très satisfait pour le prix 👌

Très bien fait et très pratique

Jag kan inte ge full pott för testaren visar inte rättvisa värden utan ungefärliga värden alltså man bör använda en bättre testare så man inte byter batteri i onödan. Se mätaren som en leksak inget annat.

El comprobador de baterías es una herramienta útil y avanzada para revisar el estado de baterías de vehículos de 6V, 12V y 24V, con un rango de 2-220Ah y un sistema de medición de corriente de arranque en frío (CCA) de 100 a 2000. • Compatibilidad Amplia: Funciona con baterías de 6V, 12V y 24V, lo cual permite utilizarlo tanto en automóviles como en motocicletas, camiones y otros vehículos de distintos tamaños. • Rango Amplio de CCA: Soporta un rango de 100 a 2000 CCA, permitiendo analizar una gran variedad de baterías, incluidas aquellas de alto rendimiento y capacidad. • Fácil de Usar: Con una pantalla LCD clara e intuitiva, muestra resultados en segundos, como el voltaje, el estado de carga, la resistencia interna y el estado de salud general de la batería. • Versatilidad en la Medición: Además de comprobar el estado de la batería, también ofrece una lectura precisa sobre el rendimiento del sistema de arranque y del sistema de carga del alternador.

Mise en oeuvre très simple il donne des indications utiles sur l'état des batteries.