Sharp ZQ-570 Operation Manual page 103

Provides a 12.digit calculator which performs
mathematical operations, including square root and
percentage calculations.
Changing the batteries:
When using the organizer, if the m symbol
appears at the bottom of the display, the operating
batteries should be replaced as soon as possible.
1. Turn off the Organizer.
2. Set the battery replacement switch on the
bottom of the Organizer to REPLACE
BATTERIES. (A red dot will appear.)
3. Slide off the operating batteries cover.
4. Remove the old batteries by pulling the ribbon
tab.
5. Insert the two new batteries on top of the ribbon
tab, taking care to position them correctly
according to the plus (+) and minus (-)
terminals.
6. Replace the cover.
7. Set the battery replacement switch to NORMAL
OPERATION.