Elecom M-XGS50MBSK Series User Manual page 25

Ensure that the connector is correctly oriented to the port.
If there is strong resistance when inserting, check the shape and orientation of the connector.
Forcibly inserting the connector may damage the connector, and there is a risk of injury.
Do not touch the terminal portion of the USB connector.
3) Turn on the power of the PC, if it has not been already switched on.
The LED light will flash slowly when charging begins. It turns off when charging is
complete.
It will take approximately 5 hours until full charge.
If the LED light does not stop blinking even after the prescribed charging time,
remove the charging USB cable and stop charging for the moment. Otherwise,
this can cause overheating, rupturing or fires.
2.
Turn the power ON
1) Slide the power switch on the underside of the product to the ON position.
The LED light will light up for a period of time.
* When the battery level is running low, the LED light will blink for a period of time.
Power-saving mode