When To Replace Batteries - Texas Instruments TI-89 Titanium User Manual

When to Replace Batteries

As the batteries get low, the display begins to dim (especially during calculations) and
you must increase the contrast. If you have to increase the contrast frequently, replace
the four alkaline batteries.
The display may be very dark after you change batteries. Use 8 | to lighten the
Note:
display.
The status line along the bottom of the display also gives battery information.
Indicator in status line
The TI-89 Titanium Keyboard
Most keys can perform two or more functions, depending on whether you first press a
modifier key.
Operating the Calculator
Description
Batteries are low.
Replace batteries as soon as possible.
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