Keep track and extend your battery life with our Wireless RF Battery Monitor.

Smart, Powerful, and User-friendly. Avoid downtime, monitor ancillary equipment, and extend the life of your batteries with the Hummingbird RF Battery Monitor.

This plug and play DC Battery Monitor allows you to wirelessly monitor up to 16 batteries in your car, caravan, 4WD, truck, boat heavy machinery and more!


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Forget about complicated installations, simply plug the RF Battery Monitor into the vehicle’s accessory socket to get started. This wireless battery monitor featuring RF wireless technology, making it perfect to monitor a large fleet of batteries or for use in a single application like a 4WD, car, caravan, or anything featuring multiple batteries.


The RF Battery Monitor can not only monitor up to 16 batteries, displaying each individual battery status on the easy-to-read screen down to a precise 100mV measurement, but you are able to name each battery relevant to its application, making it easier to identify the status of the “loader”, “forklift” and “truck #3”, or “fridge”, “caravan”, and “main battery”.

Additionally, you can monitor all your batteries with a quick drive by. If you are managing a fleet, this means you are easily able to check on your trucks’, cars’, and ancillary machinery’s batteries as you drive around the lot, making it easy to identify which batteries to put on charge, ready for their next job. Likewise, you can simply check on your boat, trailer or caravan battery on the fly, so you know when to put the solar panels out or hook up to shore power.


The RF Battery Monitor transmitter uses long-range RF technology meaning that communication is reliable in all configurations. The ultra-low power transmitters are able to be left permanently connected to batteries and do not need to be switched off when not in use.

Know when something has gone wrong by setting minimum and maximum voltage alarm levels. As each battery can be given a unique name, when the set limits are reached and unit warns the user with an easily identifiable colour indicator and an optional buzzer, the user will be able to quickly identify the battery in question.


This multi-applicational unit can act as a 12v battery monitor and a 24v battery monitor simultaneously, making it the perfect fleet and dual battery monitor. No matter its application, installation is as simple as attaching the transmitters red and black terminals to the battery and plugging the receiver into an accessory socket. The receiver can be mounted in any convenient location with a flexible windscreen-mount but can also be attached using any standard camera mount including those available from RAM, and permanently powered if desired.

The HUMMINGBIRD RF Battery Monitor is the perfect automotive battery voltage monitor, with applications for wirelessly monitoring battery operating parameters in fleets and vehicles with multiple batteries. Quickly identify unwelcome battery conditions, avoid costly downtime, and extend the life of your batteries with the Wireless Battery Monitor by Hummingbird.


  • Uses RF technology to transmit voltages
  • Comes with one sensor, can be used with up to 16
  • Buzzer for under or over voltage
  • Changes colour for under or over voltage
  • User adjustable limits per battery
  • Optional local battery monitoring
  • Multi-voltage – simply plug into your cigarette lighter plug
  • Cigarette lighter connection
  • Precision 100mV measurement
  • Ultra-low power transmitter can be left connected to batteries
  • Input (Operating) Voltage 9 – 32VDC
    Mounting System Windshield
    Power Consumption Screen: Typical 0.2W (10mA @ 12V; 1mA @ 24V), Transmitter: Typical 0.5mA (50 Microamps)
    Acquisition Time 30 Seconds to acquire RF Devices
    Resolution 100mV
    RF Frequency 433MHz
    Range 100m Line of Sight
    Operating Temperature -20°C to +55°C
    Weight (g) 160
    Height (mm) 17
    Length (mm) 74
    Warranty 2 Years


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