TOPDON Car Battery Tester 12V BT50, Automotive 100-2000 CCA Battery Load Tester, Cranking and Charging System, Auto Test Scan Tool, Digital Battery Alternator Analyzer (Upgraded Version of AB101)

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.

車のバッテリー状態を詳しく知りたくて購入しましたが、本当に満足しています。 測定は数秒で終わり、電圧だけでなくSOH（健康状態）、SOC（充電状態）、CCA（始動性能）、内部抵抗まで数値で表示してくれるので、「交換が必要かどうか」を客観的に判断できるようになりました。 購入前に上位機種の「BT100」と迷いましたが、日常点検やメンテナンス用途ならBT50で十分すぎるほどの機能です。コンパクトで扱いやすく、コスパも抜群です。 操作についても、ボタンが少なくて不安になるかもしれませんが、画面に出てくる選択肢を順番に選んでいくだけなので非常に簡単です。むしろボタンが少ないのは、操作が直感的である証拠だと感じました。 日本語表示には対応していませんが全く問題ありません。表示はシンプルな英語だけで構成されており、変な翻訳よりよほど分かりやすいですし、付属マニュアルは日本語でしっかり説明されています。また、YouTubeには海外ユーザーの解説動画も複数あり、英語が苦手でも2〜3回見返せばすぐに使い方が理解できます。 クリップ部分もしっかりした造りで、しっかりとバッテリー端子を挟んでくれます。剛性も十分で安心感があり、ケーブルも適度な太さがあって頼りない印象は一切ありません。全体的にチープな感じがなく、長く使えそうな製品です。 この価格でこれだけ詳細な診断ができ、操作も簡単、作りも安心感があるというのは本当に素晴らしいと思います。 バッテリーテスターはいろいろありますが、これはいいと思いますよ。