BUNKER INDUST Battery Monitor BM2/BM3 — Bluetooth 4.0 12V Battery Tester
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Description
xOverview
Meet the BUNKER INDUST Battery Monitor BM2 BM3, a compact Bluetooth 4.0 tester designed for 12V automotive batteries. It transforms voltage, charge, and cranking data into clear signals you can act on, directly from your smartphone. Built for everyday use in cars, trucks, RVs, and small fleets, it offers a practical way to gain visibility into battery health without specialized equipment.
What it monitors
- SIMULTANEOUSLY MONITOR UP TO 4 OF 12V BATTERIES: BM3 supports up to four devices at once, while BM2 covers a single battery. It spans 6 to 20V and uses a fireproof, high temperature resistant housing for durable everyday use.
- KEY READINGS: track voltage, state of charge, cranking power, and automatic engine start detection through the app for a comprehensive snapshot of battery health.
Connectivity and app
- FREE IOS & ANDROID APPS: BM2 uses its own app; BM3 offers expanded capabilities for multiple devices. The interfaces are designed to be intuitive and responsive.
- NOTIFICATIONS AT A GLANCE: when the monitor comes within Bluetooth range, battery status updates can appear in your phone's notification area.
Use cases and scenarios
Before road trips, you can verify battery readiness to reduce last minute surprises. For fleets or multiple vehicles, a single screen may help you spot trends across several batteries. Seasonal storage or after repair checks become quick, repeatable tasks rather than guesswork.
Build and reliability
The BM2 BM3 unit is compact enough to fit in a glove box or cabinet. It uses fireproof materials and supports a broad 6 20V range, making it adaptable to various vehicle setups. Bluetooth 4.0 provides a stable wireless link to mobile devices, enabling convenient monitoring without cables.
Getting started
Pair with the compatible app, connect the device to the battery, and begin monitoring. Real world results depend on battery condition and vehicle load, but the setup is designed to be straightforward and user friendly for ongoing maintenance and quick checks.
FAQ
Q: What devices can the BM2/BM3 monitor?
A: BM2 covers a single 12V battery; BM3 handles up to four devices via Bluetooth 4.0.
Q: How do I get alerts?
A: The free mobile app pushes battery status notifications when in Bluetooth range.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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