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The KINGBOLEN BM550 is a versatile digital car battery tester supporting 6V, 12V, and 24V batteries with capacities from 2Ah to 220Ah and CCA ratings between 100-2000. Featuring a 1.8-inch HD display, it delivers fast, accurate diagnostics including State of Health, State of Charge, internal resistance, and voltage. Designed for professionals and enthusiasts alike, it offers plug-and-play convenience, reverse polarity protection, and compatibility with various battery types, making it an essential tool for maintaining vehicle battery performance and avoiding unexpected breakdowns.











| ASIN | B0BL7S2G2G |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 4,676 in Automotive ( See Top 100 in Automotive ) 12 in Car Battery Testers |
| Colour | Red |
| Customer Reviews | 4.3 4.3 out of 5 stars (2,841) |
| Date First Available | 2 Dec. 2022 |
| Included components | BM550 Car Battery Tester |
| Item Package Quantity | 1 |
| Item Weight | 250 g |
| Item model number | BM550 |
| Manufacturer | KINGBOLEN |
| Measurement Accuracy | 98% |
| Package Dimensions | 23.1 x 14.3 x 3.6 cm; 250 g |
| Part number | BM550-DE |
| Power source type | Battery Powered |
| Size | BM550 |
| Specification met | CE |
| Style | Modern |
A**D
Easy to use does the job
Just connect and select the battery voltage then AH/CCA, this gives immediate result for State of health and state of charge. My only criticism would be just a same it does not store the battery voltage and capacity rather than have to select every time
A**R
Just as good as expensive machines
Good quality, easy to use, perfect size to keep in tool box.or in the car. Easy to read, and as accurate as expensive machines, excellent value for money. 100% recommend even for full time mechanics using daily.
P**M
Good indication of battery healh
I'm very happy that it gives a good indication of battery health. I almost gave it 5* but feel the readings do vary. I think it is better than a multimeter. I've tried it on 4 cars and yes the state of health is fairly consistent (plus or minus around 15%) however the state of charge can vary much more, plus or minus around 30% within a couple of days. Having said that I do feel it is very useful if you think your battery maybe needs changing, I did on one car (used mainly for short trips) and really it was just in a low state of charge and was still healthy - gives peace of mind.
N**E
Handy tool to check car and other batteries
Lots of these type of battery testers are available at all different prices. Read a few reviews online and for the price this came out high in ratings. This one tests just the battery itself and gives a poor or good result together with the technical results. There is a slightly more expensive model which also tests the alternator and this might be an option worth considering for some people who are not sure if they have a battery or alternator problem, however just testing the battery does will confirm or rule out if that’s the problem. Unless you are a motor trader it’s not a tool you are going to use much but for the price it’s handy to have and loan out to family and friends. It has both 6 and 12volt settings so would also be handy for testing other lead acid batteries in battery lawnmowers for e.g. and similar tools.
P**N
Accurate, easy to use, loads of information about battery health.
Works for me on the GM batteries in the motorhome. The multimeter reading said 12.6 volt, this meter said the same voltage, but the battery health is poor, at 32%, and both have high internal resistance. Hence the issues with low battery levels. Easy to use, appears accurate, no internal battery, just 4 buttons.
A**.
Brilliant battery tester
We have two cars in our household and since lockdown we have had battery issues on both of them due to their lack of use. The cars still start ok but the stop start fails frequently and the motorised tailgate refuses to open or close. As a result i looked at purchasing new batteries for both vehicles. After researching the prices for an EFB and an AGM battery i was shocked to see the prices! As a result i decided to purchase this tester to actually check the health of the batteries to see if they indeed needed replacing. I charged both batteries first with a smart charger and then connected up the Topdon, unfortunately both batteries indicated that they needed replacing. One displayed a heath of 11% and the other 53%. The device is super simple to use, it tests a wide variety of batteries including wet/lead acid/AGM/EFB. Once connected to the battery terminals you have to select some input data such as the type of battery and cold cranking amps, this information can normally always be found on the battery itself. Within a few seconds you get a detailed results screen indicating if the battery is in good or bad health along with some breakdown details (see my review pics). There are various other testing options available in the menu such as charging test, cranking amps and cold cranking amps tests
T**.
Great value device.
Great bit of kit. Easy to use. Tells you exactly what you need to know about your battery.
E**R
Didn't work
Didn't work so bought a different one. bit flimsy as well.
A**E
Every car enthusiast person should use this, very useful to know the health of the battery
J**A
l'article est comme convenu ,très bien .Et la livraison est ponctuelle !
J**I
You can test easily health of any battery
F**T
Der KINGBOLEN BM550 PLUS funktioniert einwandfrei und liefert schnelle Messergebnisse. Einfach anzuschließen, leicht zu bedienen und zuverlässig – genau das, was man von einem Batterietester erwartet.!
A**E
Je suis satisfait de mon achat appareil facile et pratique.
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