① How to access the charging port
Remove the pommel cap and the gray screw next to it.
Once you remove each part, the D-ring part can be removed, so please charge it from the USB-TypeC port.
② Regarding how to remove the chassis
If you subsequently remove the chassis, you will need to remove the red button shown in the photo.
The chassis can be removed by removing the red button and pommel and pushing in from the blade side. When replacing the battery, be careful not to change the battery polarity.