You can replace the batteries (CR2032 button cells) in wireless components yourself.
To change the transmitter battery in a wireless magnetic contact:
Lever open the housing at the notch on the long housing side. Take out the printed circuit board and replace the battery with one of the same type (CR2032). Ensure correct polarity when inserting the battery.
To change the transmitter battery in a radio cable loop:
Open the housing by removing the screws on the bottom. Replace the battery with one of the same type (CR2032). Ensure correct polarity and correct alignment of the rubber seal when inserting the battery.
To change the transmitter battery in a wireless remote control:
Open the housing by removing the screws. Replace the battery with one of the same type (CR2032) and ensure correct polarity when inserting.
Please make sure you don’t leave any fingerprints on the button cells when you change the batteries (this can lead to a higher self-discharge rate). Please take button cells to a battery recycling centre or collection point. They can be recycled there.