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Last updated on: 2026-05-28
Android Apps > Tools > BM2
BM2 icon

BM2

3.8.0
wanbaolu
3.56
1,883 reviews
100,000+
Downloads
Free

Battery Voltage Test,Cranking System Voltage Test,Charging System Voltage Test

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About BM2

BM2 is a tools app developed by wanbaolu.

Download Statistics

BM2 has been downloaded 170 thousand times. In the last 30 days, the app was downloaded 1.4 thousand times.

User Ratings

BM2 is rated 3.56 out of 5 stars. The rating is based on 1.9 thousand ratings.

App Information

BM2 is FREE to download. The APK download size is 22.05 MB. The latest version available is 3.8.0. The last update was on October 30, 2025.

Technical Requirements

BM2 requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play May 2016.

Description
Battery Monitor BLE is an application for car battery monitoring, which can monitor the real-time voltage of the car battery; count the historical voltage of the battery; it can automatically test the
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More data about BM2

Price Free to download
Total downloads 170 thousand
Recent downloads 1.4 thousand
Rating 3.56 based on 1.9 thousand ratings
Ranking Not ranked
Version 3.8.0
APK size 22.0 MB
Number of libraries 33
Designed for Android 6.0+
Suitable for Everyone
Ads NO ads

App Performance Report

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Google Play Rating history and histogram

820
290
230
150
370

Downloads over time

BM2 has been downloaded 170 thousand times. Over the past 30 days, it averaged 45 downloads per day.

Changelog of BM2

Show changelog

Developer information for wanbaolu

wanbaolu

wanbaolufit@gmail.com

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Comments on BM2 for Android

★★★★☆ Michael Calverley · Feb 3, 2026
Does the job but a couple of things I find is it does not automatically connect when close by and the battery levels are a bit off, saying low when it's actually at a good voltage. It's been on my car for quite some time and not caused any issues. Definitely handy but would be better if auto connect was better.
★★★★★ 4008 N Molter · Mar 17, 2026
Easy to install. Charging and battery information at my fingertips. Excellent price. Cant imagine needing anything else to monitor the health of my batteries and charging systems. Installed on my Ram 3500 diesel and my Kia EV6. Could not be more pleased.
★★★★★ michael muchard · Apr 24, 2025
I've been using this device for several years on all of my auto, tractor, RV and RV toad batteries. It works great. Not only does it show the battery state-of-charge, it also shows the battery performance during starting which is a good indication the battery's remaining life. I found it so useful for monitoring my motor home's toad's battery while towing that I bought devices for my friends as a gift.
★☆☆☆☆ bob haz · Apr 17, 2026
Why?\n Do you need access to all my phone data I don't want you monitoring where I'm at all times how fast I'm driving. Where all stops, I make Where I live when I'm home, when I'm not home. Somebody stares at me with binoculars. Reporting back to a third party is not acceptable. You peeping Tom, you. How is this acceptable? Peeping, Tom is against I just wanted to know what the level My battery was on my car. Now, your software has made the battery monitoring device undesirable
★☆☆☆☆ AI AIN · Jul 31, 2025
App's voltage to percentage value is off by 30 percent. It shows my voltage as 12.23 volts as 38 percent. Look at any 12 volts car battery chart on the web, 12.2x volts is 60 percent.
★☆☆☆☆ Ronald Erlston · Apr 23, 2025
Microsoft Defender has flagged this app on my Samsung phones as malware! Disappointing as the app was quite useful. Will only reinstall if cleared by Defender 😕
★☆☆☆☆ Graeme Woods · Apr 4, 2024
Doesn't appear to work with lithium as box says it does. It also wants your exact location, or it doesn't work. Why does a battery monitoring system want your precise location at all times.? I will be returning it tomorrow for refund.

Google Play Rankings for BM2

This app is not ranked

Technologies used by BM2

BM2 is requesting 28 permissions and is using 36 libraries.
Show details
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