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

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.

Update 1/27/25 to my original review. I received a replacement unit that now works for downloading the data locally. As far as calculating the fuel usage by MPG, when in Imperial units, Not metric units, I simply put the cost of a gallon of gas and MPG for the other field. I ignored the liters note in the little message area. I also confirmed that the unit had the latest firmware installed. So overall, I am very impressed with the performance and by the way, customer support was excellent also. --- First Review: Some features in this I liked, and some I did not like. First off, it was easy to hookup and get the Bluetooth working. However I could not get the data to download no matter what I did. I wanted to be able to download the data to compare historical data from time to time on a battery setup. And so maybe I had a unit that simply did not work for downloading. One feature that I did like was the fact that I could fine tune the battery discharge curve based on custom type. But for the most part it had both LiFePo4 and Lead Acid batteries you could select from the menu. Another feature that didn't make sense is they have it so you can put it into American settings, but not everything. For example, they have the option to put in data for 100 kilometers of driving, though there wasn't a way to enter miles. That was strange that they didn't have that conversion built in. The Bluetooth portion works well, and is really designed for close use only. I wanted to be able to monitor the voltage while driving at times, and that was the cool part. I really didn't expect it to go long distances, because Bluetooth is not designed for long distances. I'm not sure how the Bluetooth part works for finding your car, I didn't really give that a chance to see how it works. So this Ancel unit definitely has its pros and cons, and the pros outweigh the cons, but in the end I returned it because I could not get the data exported. Like I mentioned, maybe I had a bad unit.

I’ve been using the ANCEL BM200-US for a few weeks now, and overall, it does the job well. It’s easy to set up, connects via Bluetooth without issues, and gives a clear readout of cranking and charging tests. I like having voltage history —super helpful for keeping tabs on my battery’s health. That said, the data export feature is a bit clunky. It’s not very user-friendly if you want to dig into the numbers outside the app. Also, the State of Charge (SoC) calculation seems off, even though I double-checked that I selected the correct battery type. Not a dealbreaker, but definitely something to be aware of. Still, for the price and the features it offers, it’s a solid tool to have on hand for car, RV, or motorcycle maintenance.

This has been great for monitoring the battery on my electric lawn mower, the readings are accurate and easy to read, good quality and it has held up great in the past year since install. I love the app and other tech features and the price was not bad for all that you get. Easy to use if you read the instructions or watch the video on youtube. Features on the app are also worth a look.

I found the Ancel BM200 to be accurate and simple to use The display size was east to read and it a great way to test your batteries and feel comfortable knowing at all times. I also like the functionality of the app. I give it a 10/10 and I've already ordered 5 more to go on all of my boat batteries. They also have built-in GPS so you can track your car at all times its just an awesome product. Worth it!

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

Pratica e di immediata comprensione l'app, una volta scansionato il QRCode dell'apparecchio lo riconosce e si collega subito. Il dispositivo in se è semplice da collegare alla batteria grazie ai due terminali a "forchetta" sui cavi di cui è dotato. Peccato però che consumi troppa corrente della batteria per rimanere attivo ed è tutt'altro che irrisorio come dichiara il venditore. In 15 gg ha consumato il 30% di energia di una LiFePo4 da 100A che era appena stata caricata e che è utilizzata per il mover di una caravan. Appena collegato alla batteria, il dispositivo Ancel BM200 ha misurato la carica piena al 100% e la prova di consumo l'ho svolta di proposito in rimessaggio tenendo chiaramente lo staccabatterie aperto così da non avere alcun assorbimento se non quello del tester. Francamente un consumo di 30A in 15 gg lo reputo esagerato, visto che l'ho comprato proprio con la finalità di monitorare la scarica naturale della batteria, considerando l'eccessivo consumo si è rivelato totalmente inadeguato per il mio utilizzo. Purtroppo sono già scaduti i 14 gg previsti da Amazon per fare il reso e sarò mio malgrado costretto a tenerlo. Per questo tipo di apparecchi Amazon dovrebbe dare più tempo per verificarne il corretto e regolare funzionamento. Benchè il dispositivo ricevuto non sia funzionante come dovuto e nonostante il periodo di reso già scaduto devo riconoscere ed evidenziare l'ESTREMA CORRETTEZZA di TOPTOOL IT, distributore dell' Ancel BM 200, che dopo la pubblicazione della mia recensione negativa mi hanno prontamente contattato e subito rimborsato l'importo pagato. Oggi ho ricevuto da TOPTOOL IT la conferma chi mi stanno inviando "GRATIS" un nuovo BM200 senza la necessità di restituire il precedente malfunzionante, una volta ricevuto e installato, rimarremo in contatto per verificarne la corretta funzionalità. Un grazie sincero a chi si preoccupa realmente dei propri clienti e 5 Stelle alla serietà e correttezza di TOPTOOL IT.