Qolsys Motion Detector
1. Press bottom button then remove motion from backplate
2. Remove and replace 2 AAA Alkaline batteries then mount motion on back-plate
Interlogix Motion Detector
Press top button then remove motion from backplate
2. Press top tabs and bottom tab then pull motion from faceplate
3. Replace 1 or 2 AA Alkaline batteries then remount motion to backplate