Review on Battery Monitor BM2 BM3 Bluetooth 4.0 Wireless Battery Tester for 12V Automotive Battery Load Testing, 🔋 Monitoring Automotive Charging Systems, and Cranking Analysis. A Digital Battery Analyzer Applicable for Android & IOS Devices by David Perez

I don't use this in the car, I live 100% offline (since December 2007), everything I did was very cheap up until this year, I decided to add an additional solar system that used LiFePO4 batteries (Battleborn Lithium Iron Battery). I needed a reliable yet inexpensive way to check the voltage and health of my battery and I found this. I wasn't sure how well it would work, but since it's still a 12 volt battery, it reads exactly the same as a 12 volt car battery. Love the fact that it's Bluetooth, I don't have to go to my batteries to see what's going on, I can see the readings on my phone from my house. I bought 2 of these, one for my original golf cart battery system (4 total) and the other for my Battleborn battery. called BM3 (after installing it on my phone it's called Multi-Batt Mon), it displays up to 4 separate monitors at the same time. Конечно, поскольку я не использую его в автомобиле, большинство других вещей, которые показывает это приложение, бесполезно для меня, но главное, что я хочу видеть, это напряжение на моих батареях, я ценю тот факт, что я могу видеть запись или историю того , What's happening. If you look at the photos I'm attaching, you can see one where the device is connected to my Battleborn battery. Another photo shows a typical day of voltage on my battery, but if you look at the third photo you can see a series of unusual spikes and dips, it looks like my battery is having a heart attack! It started doing this most nights (always nights when nothing was charging) but not every night, it took me a couple of days to track down the problem (an extension cord that appears to be shorted or is about to fail). I would not have been aware of this issue if this battery monitor was not connected, it might have saved my very expensive battery and possibly some of my other devices. Is it 100% accurate? I don't know, so far it has seemed close enough to what my meter says about the battery, I would say it has more than paid for itself as I was able to be alerted to a problem that only happened at night (when nothing was charging ), I may not have even known there was a problem, my battery or other hardware could be damaged or have a shorter life expectancy. I might buy a more expensive battery monitoring system designed for offline use in the future, but for now I'm happy with the performance on both of my systems. My wish list for it (device and app)1. I want to be able to take screenshots of the app itself.2. It would be nice to be able to zoom out and scale the history (the screen you see when you click the battery voltage on the main screen).3. Add 24V capability.4. It is possible to add a digital display on the block itself showing the current voltage.5. Consider building another battery monitoring system designed for off-grid systems. I would be happy to advise you on the needs and desires of those of us who live off the grid and rely on our 12 and 24 volt systems. This is an untapped market that needs someone to fill it. Bottom line: If you're running a 12-volt off-grid system and want to monitor your batteries with a very cheap battery monitor, this is a good way to go.