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

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.

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.

Good buy for the money. Have tested it on a wide variety of wet cells from 9 Amp hour up through 24 Amp hours and internal resistance easily establishes the condition of the battery. I'll be using this frequency. I have no way to verify the accuracy of this tester, but for my purposes, it does all I need. One point: If the alligator clips don't establish a good contact with the battery cell, the tester may cycle back and forth without reaching a final readout value. Check the clips if the unit does not seem to reach a reading properly. I would buy this unit again.

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

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.

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

It does work. Easy to read display. Simple to operate. Seems to be pretty accurate. Only issue, the wire in the negative cable at the clamp seems to be loose. I have to jiggle it to get the unit to power on. Don't expect it to last long. You get what you pay for.