Wireless Bluetooth Car Battery Tester Automotive Battery Analyzer for Regular Flooded,Auto Cranking and Charging System Diagnostic Analyzer Cover All 12V Vehicles,Boat for Android & iOS System

I'm still playing with it and trying to decide if its readings can be trusted. On some batteries it gives me totally believable results, but on a couple I've had some weird readings like one battery rated at 200 CCA that this thing says has 900-1000+ CCA (see screenshots), either that is some kind of super battery or... ? Another weird one was a lawn mower battery that had been sitting around a long time, the tool accurately tells me its in poor health BUT the test shows 9.some volts when my voltmeter shows 11.06, which is quite a discrepancy. So the jury is still out on accuracy, I don't know.The app is ok, easy to use but a little flaky. The battery monitor test crashes the app so apparently I don't get to use that test... still the app is much easier than tapping through a little gameboy type of built-in screen like other models have and its nice being able to screenshot the results to save as a reference, can take a pic of a batt then run test then screenshot result and later if I go looking through my pictures its all there.The unit itself seems well made but it makes me laugh, they have these THICK insulation over itty bitty 24 gauge wires that go to huge battery clamps/jaws, kinda comical but I guess it looks cool in the toolbox if nothing else. I'll keep playing with it and we'll see if it turns into something I trust to make battery health determinations.

Update 08-4-2021: It seems that different Autool products are being bundled together in the reviews. My review is for BT Box not the 360. My original review has not changed still 3.5 stars.This review is more 3.5 stars but the device does work depending on operating system your phones has. Bought because of Scotty Kilmer back on August 2019 and when it works with the right phone it works well. This unit does not work with Galaxy S7, but it works with IPhone 6, Galaxy S9, and Galaxy S20. I guess it's because Android 8 is on S7. I will admit some are not probably pairing correctly. If you do not pair on app by hitting AUTOOL or BTBOX icon depending on phone on home screen when device is connected to battery you should see BTBOX on screen under available devices. Galaxy S7 will pair then unpair when you start test I wrote to developer about this they need to update app to work with Android 8.

It works and gives you some reasonable feed back about the status of any battery.However, the downloaded software is outdated, finicky and prone to repetitive\multiple crashes.Once the software stability improves a little, I would undoubtedly recommend this unit. It has reasonable flexibility for different types of input measurements, all while the connections are a snap.Keep improving the software for this tool, you Autool folks! Thanks.

Save your money. It’s junk.

I sent this back is really quirky so what do you want for the price. For the do-it-yourselfer maybe it's okay I probably would recommend not buying this either. If they had better software for smartphone app it might be okay. You're probably better off with the old analog battery tester or something that is completely self-containedBy the way I am a mechanic I should have known better but thanks to Amazon and they're great return policy

Needs more detailed instructions on its use, but overall very good product and very very accurate. For those that won’t figure it out, what the instructions won’t tell you is that the tests within the app need to be conducted in the order they are layed out in the app. The crank test for instance will not commence and will give you an error message unless you do the battery test first, but it won’t tell you that, you just have to know that. Lol!

I have vehicles that stand too long - this box allows me to determine if the batteries are shot or recoverable. Like android interface. Came recommended by Scotty (Youtube mechanic)

Unit seems to work great if you can keep it connected to your phone.