TOPDON BT20 Battery Load Tester

This is a terrific unit. Easy to use. Saves test results. Compact and extremely well built. Although the manual refers to a BT20 app, it is not currently available with that name. The developer has provided a work around. Scan the bar code in the manual and it takes you to a YouTube video. You’ll need to download the TestFlight app and the Battery Lab app. Test Flight will provide a code to use to open Battery Lab which is essentially the BT20 so called app. It works very well. I have used for accurate readings on our boat batteries and our two autos with no issues whatsoever. Great tool that is a must for any tool box. As always great to have a good idea of your battery’s state of charge before going to the dealer for service!!

Si quieres rápido y eficiente este es el equipo ideal.. muy satisfecho...pero siento que la aplicación está demás!

Great quick battery tester. Covers almost all type of batteries that Ive came around Very accurate and easy to use. Helps to sell more batteries for technicians out there. Quality of clamps are also great!! Earns all 5 star for its price point

I just got this battery tester today, but I have several batteries laying around to test it with and an old (15 years old) OTC battery tester to compare it to. I also have a couple multimeters to match both of them up with. This reads the voltage to the tenths of a volt on the tester itself, but to the hundredths on the app. It's accurate more than accurate enough, a bit of fluctuation in the hundredths between all my testers, but that isn't uncommon. First, this will actually drop the voltage during testing, quite a bit if the battery isn't very good. Can't say that of my old OTC. This will not give a read out of the cranking or cold cranking amps, my OTC will. How accurate is it? Who knows, but it hasn't let me down in 15 years. Now, here's where things get complicated. My old OTC will give one battery I have a pass, where as this tester fails it under a load. I trust this tester due to the drop in voltage (I didn't save the test or I would have the numbers and would post the picture) seen when testing it. It's a small battery that sat a long time, although it holds a charge just fine and the voltage is also fine at 12.6v. Overall, I'm impressed. This cost me about $20 on sale and I'm glad I jumped on it. I have other batteries I plan on testing with it, one had been sitting on the charger (just floating, already fully charged) for a while and needs to rest before I test it. Oh, and the app is very easy to use. I haven't used all of the features, but I intend to make a point to. I think this will work great and would be a great addition for any level of tech that picks it up for their home or shop toolbox or emergency tool kit. I will update sometime in the future after I've used it for a while.

日本語表示も可能だが表示がわかり難く使いずらい。英語表記のままで使った方がスムースに操作できる。