ANCEL BT500 battery tester is a more advanced tool and a upgraded version of BM300 battery monitor, dedicated to beginners and professional technicians. Ancel BM300 battery Monitor is a basic but useful car tool that allows you to check battery condition of 12V 100-1100 CCA regular flooded. Ancel BT500 battery load tester can test a wide range of regular flooded, AGM flat plate, AGM Sprial, EFB as well as gel batteries. Compatible with the major battery standards, like JIS, SAE, EN, DIN, GB, MCA, BC, IEC and CA. In addition, you can also check the Alternator's charging and Starter's cranking conditions.Not only a great battery analyzer but also a perfect starter&alternator tester.Stay home during this pandemic and have the ease of testing your own vehicle through this 12 volt battery tester while sitting at home.Only a crisis-actual or perceived-produces real change.