Battery Monitor Auto Car Motor 12V Battery Voltage Tester Free Mobile APP Real Time

I have used this for years on my RV battery bank. I decided to get one for the Excursion I use to tow it because it was having problems with the battery discharging over time. This way I can check it when I'm near the vehicle without having to get in the car and crank the engine. Love it!

After 3 days unit shorted out my LiFePO4 Batteries. Liked it for 3 days will buy another manufacturer’s unit. If

It catches dips in power sampling pretty fast

The monitor does work, however the accuracy may be off. It consistently showed 0.3 volts lower than my DVM. Not a big deal but worth noting. The claim to operate up to 100’ is a total joke. In “real life” scenario I was able to get about 30’ in open air and only 20’ when monitoring from inside my house.

I really love this little monitor, I have it on a solar battery bank, and it will log the battery voltage and when I pull up to my battery bank it will auto download all the data. I want to change my solar batteries to 24V and I want one of these that will handle 24V and I will put this one on my truck.

First one worked great for about 2 weeks, until it was taken off to relocate the battery, then would no longer connect. You could see it in the bluetooth device list, but would not link back to the BM2 app. Returned and got a second one, worked for one day, never disconnected it, but same thing with that one too. Deleted/reinstalled app, cleared memory, restarted phone, deleted all other bluetooth devices, unplugged/plugged the monitor back in, nothing.

Doesn't connect to Bluetooth sometimes, but when it connects, it works well.

Wow, great product! I can now watch how well my 300 watts of Solar is keeping my batteries up. And seems to work well beyond the advertised range of about 100 feet. I would NOT be without it.