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

Bought this to check the health of my 3 year old truck battery. It was very easy to use: just clip the clamps onto the battery terminals, and follow the prompts on the screen. Within seconds it told me that my 3 year old battery was still at 95% capacity, as well as the cold cranking amps, etc. I’d planned to buy a new truck battery soon because they only last 3-5 years in the hot humid conditions here in Florida, but after using this device I clearly have no need to spend money on an unnecessary battery just yet. This was well worth the price as it saved me the cost of a $350 battery. Bonus: unlike some of the cheap no-name competitors sold here on Amazon, this device was made in Germany and yet is still extremely affordable. Easy recommendation.

I bought the Kingbolen BM550 and it works really well, It’s easy to connect and give me all the information I need about my battery: Voltage, State of Voltage and CCA-works with many types of batteries, Car, motorcycle, boats etc-Results are fast And straightforward-The device is lightweight, easy to carry and doesn’t need it own battery- it powers directly from the battery tested-it helps me avoid wasting money on replacing a good battery.I definitely recommend it to anyone who wants to know if their battery is still in good shape or not.

Quality is good. Works like it is advertised. Would recommend.

Nifty little gadget. Works as it should even though there are so many different ways to test a battery. This just makes it simple. Good price for the unit and has decent versatility. Screen is clear making it easy to read.

I had a battery 12.23 v slow crank this proved the CCA where only 50 when they should have been 540

Product works as it should. Mostly measures accurate after running a few tests. Definitely worth it.

The readings on this Kingbolen tester did not match up with the Auto parts store meter and my other personal tester. I just proactively replaced an older car battery and this tester said that the battery needed to be replaced. The old battery still checked good at the Auto parts store when I returned the core, and my other meter said it was good as well. I tested the new battery with this meter and the numbers were lower on all the measurements compared to the store's tester and my Autel meter. It also could not even accurately measure the battery's voltage when compared to a Fluke meter. A new well charged 12v car battery should test very close to 12.6 volt (6 x 2.1v per cell). My new battery checked 12.43 on the Kingbolen vs 12.55 on the Fluke meter. That's more than a tenth of a volt off which is a lot. All of the CCA and battery condition calculations the are based voltage, resistance, temp etc. Garbage in, garbage out.The tester is very easy to use and I did like that the CCA's could be input to the exact amp rating vs other testers that only allow input every 10 or 20 amps. I also liked that it had battery health % and state of charge %, but they did not seem accurate at all. It also measures the internal battery resistance which checked close to what would be expected in a brand new battery.There are a lot of reviews here and videos on YouTube praising this battery tester. Many videos seemed they were free product reviews or connected to affiliate programs. Maybe I got a bad one. If you already have a dead battery, this meter may just confirm it due to the inaccuracy. For me, it did not give accurate enough data when I just wanted to test a good battery and monitor the battery's health over time.

easy to use. that tells it all