Generalmusic 271221 Owner's Manual page 123

BATT&R, (Battery level and release number)
This button opens a window which contains two important piec-
es of information.
At the top of the screen, you will see the release date of the
operating system version which your Equinox is currently using.
This information is important to know, especially when seeking
technical support in case of problems.
The lower part of this window tells you the charge level of the
Equinox's internal battery. This battery is used to retain informa-
tion in the instrument's memory after the unit has been switched
off. If you leave the unit off for a long period of time, the battery
will discharge completely and the information stored in memory
will be lost.
System 9•9