A battery-powered siren is generally the type known as a backup siren.

Because the siren unit itself contains a battery, it can still sound an alarm even if the vehicle’s power supply is cut off.
For example, even when the vehicle battery is removed or when power to the security unit is stopped, the system is designed to detect an abnormality and trigger the siren.

This type is effective as a preparation for situations where someone tries to disable the alarm by turning off the power.
As a result, it is one of the important pieces of equipment for enhancing peace of mind with your security system.

However, the built-in battery is a consumable, so it will deteriorate over time.
In many cases, it is not just the battery that is replaced; rather, the siren unit itself needs to be replaced.

The actual replacement method varies depending on the mounting position and surrounding structure, but there are also many cases where it is installed so that it can’t be easily removed.
At Logon, after checking the condition—including that point—we generally guide you toward replacing the siren unit itself.

If you notice any concerning changes, such as the siren sounding weak or not sounding at times, we recommend checking it as soon as possible.