BM550 6V 12V 24V Car Battery Tester, 100-2000 CCA Voltage Tester 2Ah-220Ah Internal Resistance Tester Accurate Digital Auto Battery Analyzer for Cars Trucks SUV ATV Boats Motorcycles Vehicle

Worked as intended. Another electronic tool you definitely need if you’re a person eho enjoy’s DIY on car maintenance. Cable and alligator clips are sturdy. This is a compact size easy to hold and handle unlike others which are expensive and bulky

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.

Very basic battery tester, but will allow testing by CCA or AH capacity ratings so it works on more than just cranking batteries (I am testing non-start rated deep cycles for an electric motor and on-board electronics). It DOES REQUIRE that the battery have SOME juice in it as the unit does not supply its own power. Also, I have not tested it on a weak battery with a bad cell to see if it indicates the error or would just report poor condition. All-in-all, for the low price it is a decent unit if a basic test is all you require. It for sure isnt the one you would use at an auto repair facility, but it did the job I needed to do testing three batteries after sitting idle for more than 18 months. Does NOT come with a case of any kind.

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.

Works great. Fast and clear results. One tip, connect it directly to the battery and not to satellite jump locations in the engine bay if your battery is located, for example, in the trunk.

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.

Ideal für Leien eine Batterie zu Testen.

Parece que funciona bien. Tiene aspecto de máquina compleja de taller pero es válido para un par de funciones que tiene. Fácil de usar.

Every car enthusiast person should use this, very useful to know the health of the battery

Einfachster Batterietester mit guter Funktionalität und simpler Anwendung.

PRO 👍: facile da usare - compatto - misura più valori - alternativa al multimetro - non servono pile. CONTRO 👎: nulla per ora Questo tester per batteria mi è stato utile sul camper per avere uno strumento compatto per vedere la salute delle batterie. È facile da usare , basta collegare bene i morsetti poli e si accenderà il display. Prende la corrente dalla batteria perciò non servono pile per farlo funzionare. 🔋 Si imposta il CCA che si evince dalla tabella, in base agli AH della batteria, e il tester comincerà a elaborare i dati. Per chi non è pratico basterà leggere la scritta "good" per essere soddisfatto, gli altri potranno scorrere il menù e vedere gli altri dati sulla salute della batteria. A mio parere indispensabile la misura in V, per fortuna è visualizzabile. Mi piace perché è un'alternativa al multimetro, più pratico , più compatto, e soprattutto non ha bisogno di pile. Il multimetro classico quando ti serve ha sempre le pile scariche! 👍