Batteries - Texas Instruments TI-89 Titanium Short User Manual

Batteries

The TI-89 Titanium uses four AAA alkaline batteries and a backup silver
oxide battery (SR44SW or 303). The backup battery is already installed,
and the AAA batteries are provided with your product.
Installing the AAA Batteries
1. Remove the battery cover from the back of the calculator.
2. Unwrap the four AAA batteries provided with your product and
insert them in the battery compartment. Arrange the batteries
according to the polarity (+ and -) diagram in the battery
compartment.
3. Replace the battery cover on the calculator. The cover should snap
into place.
Replacing the AAA (alkaline) batteries
As the batteries lose power, the display begins to dim, especially during
calculations. If you find yourself increasing the contrast frequently,
replace the AAA alkaline batteries.
The status line also gives battery information.
Indicator
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.
Getting Started
Meaning
Batteries are low.
Replace batteries as soon as possible.
43