Elecom M-XGS31BBSK Series User Manual page 51

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.
Ensure that the battery is inserted with the positive (+) and negative (-) terminals
oriented correctly.
4) Put the battery cover back on.