B-2 Service and Warranty Information
The TI.80 uses two CR2032 lithium 3-volt batteries.
As you use the TI.80, the battery voltage will gradually drop,
and the display will dim. You can adjust the contrast to darken
the display when this happens. If the display is dim and
adjusting the contrast to level 9 does not make it dark enough,
you should replace the batteries. Refer to pages B-3 through
B-7 for instructions on how to change the batteries.
Follow these safety guidelines concerning batteries.
¦Do not mix new and used batteries.
¦Do not mix different types of batteries.
¦Follow polarity diagrams carefully.
¦Do not replace batteries with rechargeable batteries.
¦Do not place non-rechargeable batteries in a battery
charger.
¦Properly dispose of used batteries immediately. Do not
leave them within the reach of small children.
¦Do not incinerate used batteries.
Caution: The TI-80 retains stored data when you are
changing batteries only if you:
¦Do not remove both batteries at the same time. (At least
one battery must be installed at all times in order to
retain memory.)
¦Turn the unit off and do not turn it back on until you have
changed the batteries.
¦Do not allow the batteries to run down completely before
changing them.
Follow the steps on pages B-3 through B-7 when changing
batteries.
Battery Information
When to Replace
the Batteries
Battery
Precautions
Retaining Stored
Data