Hardwired trackers and the vehicle battery
A hardwired tracker takes its power from the vehicle's electrical system. It draws a small current, and most are designed to reduce what they use when the ignition is off. Because the figure depends on the device, the settings and how often it reports, there is no single number that applies to every tracker.
For a vehicle that is used every day this is rarely a concern. The case worth checking is a vehicle that stands unused for weeks, particularly with an older battery. In that situation ask the supplier how the unit behaves when parked, whether it has a low-voltage cut-off, and whether the reporting interval can be changed for parked vehicles.
The backup battery inside a hardwired tracker
Many hardwired trackers also contain a small internal battery so they can report if the vehicle power is cut. That is a different job from running the tracker day to day: it keeps the unit alive long enough to send an alert, not to track for weeks.
Battery-powered trackers for trailers, plant and assets
Trailers, plant and equipment often have no power supply, so the tracker runs on its own battery. How long it lasts depends mainly on:
- Reporting frequency. Reporting every few minutes uses far more battery than a few times a day.
- Signal strength. A device that struggles to find a network works harder and uses more power.
- Temperature. Cold weather reduces what a battery can deliver.
- Battery size and how the tracker sleeps between movements.
For this kind of asset the useful question is not "how long does the battery last" but "how long does it last at the reporting interval I need". Our guide to GPS tracking for construction fleets covers choosing between powered and battery trackers, and our tracking products page lists the options.
What to ask a supplier
- Is the tracker powered by the vehicle, its own battery, or both?
- What is the expected battery life at the reporting interval I will actually use?
- What happens when the battery gets low: is there an alert before it goes quiet?
- Is the battery replaceable, and by whom?
If you are unsure which suits your vehicles or equipment, contact Trackmatic with what you operate and we will recommend an approach.
Frequently asked questions
Does a hardwired GPS tracker drain a car battery?
A hardwired tracker draws a small amount of power, and most reduce their activity when the ignition is off. The effect depends on the device and settings. It matters most for vehicles left unused for long periods, so ask your supplier how the unit behaves when parked.
How long does a GPS tracker battery last?
A battery-powered tracker can last anywhere from days to long periods, depending on how often it reports, signal strength, temperature and battery size. Ask for the expected life at the reporting interval you need rather than a single headline figure.
Do hardwired trackers have a backup battery?
Many do. A small internal battery lets the tracker send an alert if the vehicle power is disconnected. It is there for alerts, not for normal operation.
Choosing powered or battery trackers?
Tell us about the vehicles or equipment you want to track and we will recommend a suitable tracker.
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