Paxar Monarch 9401 - Manual (Page 13)

Battery
The memory card uses a 3-volt lithium battery, type BR2325.
Battery shelf life is approximately five years, with an active life
of six months. The battery cover is located on the edge of the
card.
CAUTION
If you remove the battery cover from a memory card the
formats will be erased.
NOTE: To avoid losing formats, it is a good idea to keep
copies of your memory cards. Refer to "Copying
a Memory Card."
Removing the Insulating Tab
New memory cards have an insulating tab to prevent drain on
the battery before you use the card. You must remove this tab
before using the card.
Figure 3
Tab
Using the Memory Card
9