Casio DT-810M50RC - Manual (Page 20)

E-20
Power Supply
To remove the lithium-ion battery pack
1
Slide the main battery compartment cover
lock to the FREE position and remove the
cover.
2
Slide the lithium-ion battery pack from the
main battery compartment cover.
Installing the Back-up Battery
1
Use a screwdriver to rotate the screw that
secures the backup battery holder in place
counterclockwise to loosen it.
2
Insert a screwdriver or some flat object into
the back of the backup battery holder and pull