Take the Hue motion sensor from its magnetic bracket and remove the back plate with a Phillips screwdriver. Remove both batteries and replace them with fresh new ones (2 AAA-batteries, LR03 Alkaline, non-rechargeable). Please place the batteries with the polarity (+) as indicated in picture below.
Close the cover and place the Hue motion sensor back on its magnetic bracket.
In case the Hue motion sensor is not working instantly, please wait outside of sensor detection range for at least 2 minutes. In case sensor still does not work after the waiting time mentioned above, press the setup button for 1 second.
Note: Dispose of the empty batteries complying with local regulations.
Note: Rechargeable batteries generate a voltage that is too low for reliable operation.