ANCEL 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

The app was a bit glitchy during setup with my first unit, but when I ordered a second BM200, the Bluetooth connection automatically detected the serial number without any manual entry. The app now works flawlessly and quickly helped me identify a parasitic battery draw in my car. Combined with a thermal imaging camera and fuse tester, I was able to isolate the exact circuit and resolve the issue. The additional data provided by the BM200 is genuinely impressive — including vehicle location tracking, trip history, and fuel costs per trip. It functions like a sophisticated data recorder for your battery, giving me clear, objective information that protects against unnecessary "you need a new battery" recommendations from dealerships or shops.This is an essential tool for any serious DIYer.

Does exactly what it says. Great way to check on the battery of a car thats not used frequently.

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.

Great product. Apps works well and is very intuitive. My only complaint is that is doesn't work on my Android radio in my car but that isn't Ancel's fault. I bought one for my brother and I am getting one for all my cars and my kid's cars.

Update: I've but been and to connect from my phone for over a week now. I've driven almost every day but it will not connect. I got what I originally needed out of it so I will probably just remove it and look for a different device. Original: I got this to monitor the battery in my F150 and it works but just barely. From the driver's seat it connects most of the time but just outside the driver's door it won't connect anymore. On the passenger side it reaches to just behind the rear door. I mounted it on top of the battery which in the front passenger side under the hood. The lack of distance makes it useless for monitoring unless you only care about the state once you get to/in the vehicle. The Victron shunt on my RV parked on the opposite side of the truck reaches to the living room. The truck's Bluetooth will connect to my phone if I leave it in the house just fine, I'm not sure why the range for this is so short. I would give it 4 or 5 stars if the range was better. I had hoped it would reach the house then I was going to see if I could get Home Assistant to read and track the voltage, but given that it doesn't reach that far I'm not even going to try. My truck has been reporting low battery when it sits overnight if it is cold so I was wanting to track it 8n different scenarios. The only good thing is that it should log the data so at least I can see how it is draining over time. If it wasn't for that I would be sending it back. I already have way more battery data through my OBD adapter while I'm driving. Lack of range is why I removed 2.5 stars since it is by far the shortest range Bluetooth device I have. I removed the other half star for the app. I don't like that it is tracking my location and recording it. I would return this but would rather just eat the cost than go through the trouble just for it to most likely go into a landfill if I did return it. I'll keep it in the truck for awhile but may move it over to the generator or one of my other battery boxes.

I installed this in my 2024 Ioniq 5 because I was concerned about all the comments on 12 volt battery drain and ICCU failures that I read on forums. It was easy to installed and connected to my iPhone. Now I can wirelessly monitor the 12 volt battery. It gives me peace of mind.

I hope this will help so here is some information: The good: This is a nice unit and the app is easy to use and shows history of the battery voltage which is nice. The voltage readings are very accurate I tested against one of my voltmeters and it was spot on. It has customizable voltage warning setting if the battery gets to or below a certain voltage percentage. It has a vehicle charging and starting battery test which is nice. Overall accurate and nice app to keep an eye on your batteries voltage. It also shows the temperature which when compared to my other known good temperature guns was within 2 degrees so decent accuracy on temp. The Bad: Bluetooth range is only like 20 feet max. The app doesn't run in the background so you won't get a low battery or high voltage alert unless you leave the app open. You can't fully customize the battery type but it does have standard or lithium but you have no control over the voltage vs state of charge. It just uses a generic automotive12v type battery voltage for its reference. So if you have a 15v lithium or something it will say fully charged even if its 70% charged. But this was designed for automotive type batteries so i guess its just doing what it was meant to do.

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.

Inget speciellt, mer än läs instruktioner.

Très pratique pour suivre l'état de la batterie. Bon logiciel

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 !