How to Disassemble the Keychron M3 Mouse
If everything works fine with your mouse, it is not recommended to try this at home as it can risk injuries and damage caused by disassembling. Disassembling the M3 will void its returns and warranty.
Step 1: Please peel off the films on the back of the mouse and unscrew the four screws. (Screw type: PWA1.5*4.0 mm)
Step 2: Gently lift the top case and pull back to open the top and the bottom cases. There is a ribbon cable connecting them, be careful not to tear it apart.
Step 3: There is a small buckle where the ribbon is connected, push the small black buckle up to release the ribbon.
Step 4: After separating the top and the bottom cases, remove the battery (Note: the battery is glued to the black standoff) and unscrew the four screws on the PCB. (Screw type: PWA1.5*4.0 mm）