Texas Instruments TI-89 Titanium User Manual page 925

Replacing the
Alkaline Batteries in
the TI-89 Titanium
Replacing the
Lithium Battery in
the TI-89 Titanium
Appendix B: Technical Reference
1. If the TI-89 Titanium is on, turn it off (press
information stored in memory.
2. Slide the protective cover over the keyboard and place the device face
down.
3. Push down on the battery cover latch, and then pull up to remove the
cover.
4. Remove all four discharged AAA batteries.
5. Install four new AAA alkaline batteries, arranged according to the
polarity (+ and -) diagram inside the battery compartment.
6. Replace the battery cover by inserting the two prongs into the two slots
at the bottom of the battery compartment, and then push the cover until
the latch snaps closed.
To replace the lithium backup battery, remove the battery cover and
unscrew the tiny screw holding the BACK UP BATTERY cover in place.
Remove the old battery and install a new WR44SW or 303 battery, positive
(+) side up. Replace the cover and the screw.
Lithium battery cover
2 ®
) to avoid loss of
AAA alkaline
batteries
922