The Century BM12V Battery Monitor is one of the easiest ways to keep track of your battery's state of charge and your vehicle's starting and charging systems. It connects to the battery terminals and sends live data to your phone over Bluetooth.
What it does
The BM12V helps prevent breakdowns by warning you before a battery lets you down. Push notifications alert you to low battery voltage, and the app records daily voltage history so you can spot a problem developing. You can also run crank tests and automatically log trip duration.
Inside, it has a recoverable fuse for short-circuit protection and reverse-connection protection in case the leads go on the wrong terminals during install.
What it suits
- Bluetooth-enabled iOS and Android phones
- 12V flooded, AGM and gel lead-acid batteries
- Cars, 4WDs, SUVs, trucks, caravans, boats, motorbikes, ride-on mowers and personal watercraft
Battery monitor FAQs
What does it actually measure?
- State of charge: the battery's resting voltage.
- Cranking test: the voltage available while the engine is starting.
- Charging test: how well the alternator charges the battery at idle and above 2000rpm.
How do I use it?
Download the free BM12V app from the App Store or Google Play. With Bluetooth on, the app connects to the monitor automatically and starts showing data.
How long is the warranty?
24 months nationwide. Conditions apply; see the owner's manual.
What's the operating temperature?
-40°C to 90°C.
Want more detail?
For deep cycle, lithium and dual battery systems, a shunt-based monitor gives far more accurate state-of-charge readings. See our battery monitors and shunts. For a quick check of your car battery, book a free battery test in store, or browse Century batteries.
Talk to us about your setup
Not sure which battery monitor suits your setup? Visit us at Unit 1, 66 Pilkington Street, Garbutt, call 0459 364 303, or request a quote online.