Dillon EDXtreme (Red) - Manual (Page 53)

52 EDXtreme User Instructions
3. Place the battery box on a stable surface and remove the securing screw with
a #1 phillips screwdriver.
4. Remove the batteries (with a screwdriver if necessary) and replace with new
AA batteries. Be sure to observe polarity when installing new batteries.
5. Place the cover back on the battery holder and tighten the securing screw. Do
NOT over tighten!