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!!

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

Have tested a few batteries and seems to work like it is supposed to and pretty accurate.

This is going to be a detailed review. The short version is, its a MUST buy! Lets start with the packaging, nice simple box with plenty of information on it. Once you open it up, you find the tester and instructions. The instructions are well written, and in a few different languages. The tester feels nice and solid, if you squeeze it the plastic does not flex or squeak. The clamps are compact but feel solid and they open really wide making it easy to get onto any battery terminal. The tester is simple and advance at the same time. When you hook up the tester to a battery, it will tell you if the battery is low on power right away as you can see in one of my pictures. The first battery was reading at 9.7v and the tester told me right away. On another picture you can see I am testing it on one of my cars that sits a lot. Battery shows 12.1v, but hitting the "TEST" button, it puts a load test and told me it was falling down to 10.6v. The tester is also advance, once you download the app to your phone, you can run a few different test. The load test will graph out the results if the battery drops down a lot. The best part, after every test you can save the results to check out anytime. The last test I tried was the cranking test, right away it told me the battery has low cranking voltage. I suspected this was the case, as it has gotten colder I have noticed the battery struggling a bit, this only confirms what I suspected. My ONLY complaint, I wish they would have put a QR code to download the app, either on the box or instructions. However the instructions does tell you to download the app from either the playstore or Apple app store. Over all this is a must buy for any dyi'er or even a professional mechanic. Also would make a great stocking stuff to any gear head!

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。