Elecom M-XGS31DBSK Series User Manual page 27

The LED will light up white for a period of time.
* When the battery level is running low, the LED will blink white for a period of time.
Power-saving mode
When the mouse is left untouched for a fixed period of time while the power is ON, it
automatically shifts to power-saving mode.
The mouse returns from power-saving mode when it is moved.
* Mouse operation may be unstable for 2-3 seconds after returning from the power-
saving mode.
Replacing the battery...
1) Remove the battery cover.
2) Remove the battery.
3) Insert the battery according to the instructions on the battery compartment.