ANCEL BM200 Car Battery Tester 12V Automotive Battery Monitor Bluetooth Auto Battery Checker Tester with Cranking Charging Test Alarm Record Voltage History Voltmeter for Car/RV/Motorcycle/Truck/Boat

The 12V battery on my Mazda MX-30 EV is dying, instead of having to call emergency road service, when my EV, will not start, I found this device on a post on YT, they directed me to Amazon. I placed it on my battery, as it monitors my 12V battery, indicating the SOC(State of Charge) and the battery Voltage. The current draw at 12V from the battery, is from 4.63mA to 1.38mA, depending on the state of the battery test. Accuracy is about 99% which makes an excellent battery monitor. The GPS(find car) uses google maps at this time is not accurate at all. As I am sitting in my car which is in a parking outside is indicating, is 50M away. This does not work at all in a mall inside parking. The setup is very easy, but it can only pair one device at at time, must pair with the Ancel BM200 APP. I am happy with this 12V battery monitor, is a good buy, must have, when monitoring 12V battery is needed. Recommend, as it works for me, allowing me to know the battery voltage in real time , ploting history graphs of battery voltage, saved for 5 days for review.

Atraves de la aplicación se sabe en todo momento como está la batería.

Parfait ! Installation et utilisation fort simples, connexion bluetooth très facile. Cet appareil m'a permis de surveiller la fin de vie de ma batterie pour la changer avant la panne !

Bin mit diesem Gerät sehr zu frieden ,habe es in unserem Smart 451 ForTwo mhd 2 Generation mit Start stopp eingebaut und macht alles genau so wie angepriesen , vorausgesetzt man gibt die richtige Batterie Bauart an !!!Das Tool ist sein Geld wert,einfach schnelle und unkompliziert Montage. Die App zeigt die alles genau an was du brauchst. Zu 100% empfehlenswert…… zufriedener Verbraucher

I don't drive my truck a lot lately and as a result battery has gone dead a few times. I got this so I can check the battery remotely and it will also send a notification if your battery falls to a certain level that you can adjust in the app settings. It works perfectly from behind the wheel, I'm able to park almost directly under my bedroom window it should work fine from there too if I open the window. Bluetooth is a short range technology, most folks are saying under fifteen feet which is fine with me. There are a few tenders available that have wifi capabilities but this gadget is more versatile because you can use it with any charger or a solar panel etc. and keep an eye on your battery level remotely. The unit also has other functions that I have no plans to use at the moment but adds to the value of the item for sure. I had zero problems finding the app with the convenient scan box on the box the item comes in and the app had zero issues finding the gadget and pairing with it (make sure bluetooth is on before you install the software, the gadget comes on in pair mode like many if not most bluetooth gadgets these days. So far so good, it would appear they've improved things or I just lucked out and don't have any interference at my house. Does what I wanted, lets me monitor car battery voltage without getting into the engine compartment. You will automatically get a notification every day from the unit but it will only show current battery voltage level which is what I wanted it for. update roughly three weeks later: Item still working great but this morning when I started up the app it could not see the battery in my car only a couple feet away. I have noticed that sometimes with products using bluetooth an app update might mean you have to restart the phone/tablet or rarely even reinstall the bluetooth gadget before things start working correctly again. I don't know if there was an app update, it was in the 20's outside this morning but that shouldn't have been cold enough to create a problem. Turned the phone off and restarted, all working again so be aware that if you have issues you possibly need to turn off your phone and restart to get it working again (not a biggie). I put my new nocco genius 10 charger on the battery (probably stay away from where you have the gadget connectors on the battery just in case) and used the app to monitor the charging works perfectly shows voltage coming off the battery and percentage charged to get any more info you have to start the car up. It's now almost April of 2025 been using this about six months. Item still working perfectly and I can sit in my bedroom and pickup the bluetooth connection off the truck parked outside my window. It's doing what I wanted it for, making sure my battery doesn't go dead because I don't drive the truck enough. I'd recommend this little add on to anyone with a vehicle they don't drive every day but need it to start when you need to drive it. September 2025 bought a solar charger (schumacher) because my one outdoor outlet on that side of the house developed an issue. This item lets me monitor the battery even running off a solar panel charger. This was such a good purchase and it didn't cost that much at all. Would definitely get this item again if I change vehicles.