Hold the PowerShot electric stapler up away from your face. Aim the staple head away from any individuals also to make sure you do not accidentally discharge a staple while reloading the device.
Pull down on the staple chamber on the bottom of the stapler (directly under where the staples are discharged from). This opens up the staple chamber.
Slide in the new row of staples with the points facing in the direction the staple gun is pointing.
Push up on the staple chamber to close the stapler and lock the new staples into place. You are now ready to go back to your stapling.