Konica Minolta Q-M100 - Manual (Page 11)

5. After confirming that all batteries are set right, firmly close the battery
cover by sliding it in the direction of the arrow until it clicks.
* When the battery's remaining energy indicator indicates the half level,
the batteries need replacement. When replacing the battery, prepare
four new batteries of the same type to replace all at the same time.
When going out with the camera, it is recommended to have four new
batteries always ready.