Review on Battery Monitor ANCEL BM300 - Bluetooth Voltmeter for 12V Solar Power Systems/RVs/Motorcycles/Boats/Cars/Trucks - Voltage Charging Cranking System Test with Alarm by Sean Webb

I'm very disappointed with it. Hardware is not the problem. The problem lies in the application. He has several issues and the company isn't interested in fixing them. (Don't let the great-looking feedback section fool you. All you get from them is the answer "It's stable and we won't change it.") So what's wrong with that: 1) There aren't any Setting for AGM batteries Therefore, the charge percentage is displayed incorrectly. 2) The real-time voltage graph shows incorrect data when the application is stopped and restarted. It will take a few minutes to fix. 3) You cannot zoom into the data graph or access the data to plot it yourself. It is very difficult to see what you need to see. It's sad to see a company making great hardware and then encountering an app developer who doesn't want to do their job.