The batteries of the wires DOM locks will last a long time. In your software environment you can always find the current status of the battery. It is also possible to receive an email notificaiton.
On the lock itself it is also visible if the battery is almost empty. When placing a card the lock will blink in different colours. Only when placing the card a second time the door will open.
If the lock responds this way then you will have to change the battery. The door can be opened several hundred of times when this status is visible.
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