Getting Started 65
Before replacing the batteries, turn off the TI-89 Titanium by pressing 2® to avoid
losing information stored in memory. Do not remove both the back-up battery and the
AAA alkaline batteries at the same time.
Replacing the backup (silver oxide) battery
1. To replace the silver oxide backup battery, remove the battery cover and unscrew
the tiny screw holding the BACK UP BATTERY cover in place.
2. Remove the old battery and install a new SR44SW or 303 battery, positive (+) side
up. Replace the cover and the screw.
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