

🔧 Never get stranded again — master your battery health like a pro!
The VDIAGTOOL BT500 is a professional-grade car battery tester and system analyzer designed for 6V, 12V, and 24V batteries. It offers precise load testing from 5 to 3000 CCA, supports multiple battery chemistries, and diagnoses starter and alternator performance. Engineered with advanced safety features and an intuitive interface, it empowers vehicle owners and professionals alike to quickly assess battery health, state of charge, and charging system integrity, preventing costly breakdowns and ensuring reliable starts across cars, trucks, motorcycles, SUVs, ATVs, and boats.
























| ASIN | B0DBLKZ3XF |
| Best Sellers Rank | #12,339 in Automotive ( See Top 100 in Automotive ) #24 in Battery Testers |
| Brand | VDIAGTOOL |
| Customer Reviews | 4.5 4.5 out of 5 stars (280) |
| Date First Available | August 19, 2024 |
| Item Weight | 15.1 ounces |
| Item model number | BT500 |
| Manufacturer | VDIAGTOOL |
| Manufacturer Part Number | VDT-BT500 |
| Model | BT500 Car Battery Tester |
| Product Dimensions | 6.45 x 3.35 x 0.96 inches |
D**L
Very capable battery tester at a reasonable price
As winter is quickly approaching and car batteries are failing, I figured this was a good time to try a new battery tester. I have an old style toaster which does a great job of putting a load on a battery, but the toaster has its limitations. That’s where I found the BT500 is a great addition. I found it easy and intuitive to learn. I also appreciate the printed manual which clearly explains the operational modes. I tested multiple car, motorcycle and marine batteries and I found it to be quite accurate. By sculling through the display you can quickly perform a capacity check, then a cranking test and finally a charging test. Input the capacity of the battery I.e. 700 CCA and start the vehicle and it will show you the result. Another nice feature of the charging test is using the waveform option to monitor charging rates and starting voltage. The test results can also be saved and printed. Finally you can update the software with future upgrades. Over all I found it to be a great addition to my tool box.
J**T
Great DIY Battery Tester!
This is a great tool to have in your bag to quickly diagnose the state of your battery which I have used on multiples cars. Quality battery clamps with alligator teeth on one side for good grip and a good length cable. There is even a quick test button, one click to instantly get a reading on your battery. This is super handy to grab a quick state of health on your battery and the feature I use most of the time. The display is very bright and easy to read at most angles. In addition it has an LED indicator for a quick visual of Good (green), Charge (yellow), or Poor (red). In addition you can go into the vehicle mode to do additional tests such as Battery test, Cranking test, and Charging test. Just follow the steps on the screen and it easily walks you through the process. The Battery test will give you detailed information on the State of health as well as the State of charge. In addition it will show you current voltage as well as the cold cranking amps compared to the factory standard on your battery. The results are given as to whether the battery is good, good but needs charging, replace, bad cell, or charge retest. Glad I had this tool because it let me know that my truck battery is failing and says replace, which keeps me prepared! The Cranking test will show you detailed data when you crank the car following the prompt but mostly you are looking for Normal or Low for the result. The Charging test is a little hard depending on your battery placement since you have to rev the engine but I was able to do it by myself with one of my cars. I do not have a motor cycle so was not able to test that feature but I am sure it will be helpful to those where that is a part of their fleet. You can do both in vehicle and out is vehicle battery testing which is helpful. The waveform feature gives you a graph display of visual dips in the ignition and charging states as well as offering a quick button for this feature as well. Additional features that come with this device are system screen test and button test as well as a easy to read manual. Provides easy review of recent battery test and wave form data as well as printing the results if maybe you need to give it to a neighbor. Plus it gives you a usb port for updating the software on the unit for feature improvements. Great Tool to prevent you from not being aware of a failing battery and leaving yourself stranded. The is also a Great company with exceptional support and quick to get back to you if you have any issues or need help! Highly recommend!!
B**O
AFFORDABLE, compact, accurate, quality tester with many features! Easy to use.
The shipping of this tester was really fast, received tester in 3 days to Hawaii. It came in a box and the box was packed well to prevent damage. Battery tester's quality is excellent! The tester is thick plastic, the cord does not retain memory when bending, and the battery clip open wide to make sure you have a good connection. The price of this tester is awesome!! It has many features for it's super low price. I have bought a lot of meters and testers in the past. Some only check voltage, a few is a percentage and voltage meter, and usually the load tester is separate. I would carry at least 3 meters to check voltage, load, and percentage. This BT500 can do all those tests and more. It is very simple to set up by connecting the red clip to the positive post and then the black clip to the negative post on your battery. It turns on and the displays show you your options. There are 3 lights to show you off hand your batteries condition. Green is good, yellow means you need to charge, and red is charge and if it can't be charged, it is time to get a new battery. You can verify the lights by going to the testing options. The menu is easy to follow. It will ask you 12 or 24 volts, what type of battery, and the cold cranking amps. The label on the battery has all this information. This tester will tell you the volts, amps, state of health, state of charge, and provide you with a waveform. You can have a tester that tells you your battery has 12 volts but that is meaning less. You need to put a load on the battery and if you have a weak battery with less then 10.5 volts, your car will have a hard time starting if it starts at all. the BT500 tester will also indicate how much your alternator is putting out. You usually need around 13 to 15 volts for your battery to be recharged. I really do not have anything negative to say about the tester itself because it is accurate, durable, and it does everything the company says it does. Very easy to use and very compact. Two things that does not affect my rating because it is not negative. One, I wish it came with a little plastic carrying case, but that is no problem because you can always find one. Two I wish it was touchscreen and that is not a problem because the buttons are marked clearly and is very easy to use. I have tried this tester on my boat, riding mower, motorcycles, and cars and trucks. What I found out on my outboard motor is that the motor has no rectifiers and parts to recharge the battery, and my riding mower had the ability to recharge the battery except when I flipped the mower over it lost its ability to recharge. Now I know exactly how long my boat battery will last before I leave the dock. Being stranded on the ocean due to a dead battery is no fun. All this time I thought my boat battery was being recharged when using the boat. This tester may have saved me from being stranded with a dead battery. I do not think this tester is waterproof so if you take it on your boat, make sure to keep it dry. I am impressed with all the features this tester has and what it can do.
T**D
Best choice for $50 and under, tons of features, very accurate
Tried this head to head with a TopDon T100 and this unit has more functions, better screen, software is upgradable (I already updated it), and it seems to more accurately measure the 5 batteries I’ve measured with it. Oh, and it’s cheaper than the TopDon. Negatives: the jaws are just ok. Not heavy duty and I would trust it to be strong enough to be used daily at a shop. For the 10 vehicle batteries I need to stay on top of, this is perfect. I returned the TopDon I’ll update my grading after I take it to a few auto parts places and Walmart to test brand new batteries. I plan to compare it to the Autel ones many of the auto shops use.
R**A
Good
P**T
Sehr übersichtlich, Funktionen selbsterklärend, deutsche Sprache einstellbar.
J**N
The unit is very well made but..... it says it tests 6-24VDC. It does not. 12/24 only. It will power on at 6 VDC but you cannot test 6VDC batteries. There are no test parameters.
D**S
Works good
N**Y
Je l'ai acheté pour m'est batteries a décharge profonde de camper power safe SBS 190F et il a pas la fonction que je voulais dessus me prend la fonction SBS ...Stationary batteries service
Trustpilot
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