Battery Information - Texas Instruments TI-84 Plus Manual Book

Battery Information

When to Replace the Batteries
The TI-84 Plus uses five batteries: four AAA alkaline batteries and one
SR44SW or 303 silver oxide backup battery. The silver oxide battery
provides auxiliary power to retain memory while you replace the AAA
batteries.
When the battery voltage level drops below a usable level, the TI-84 Plus:
Displays this message when
you turn on the unit.
Message A
After
Message A
function for about one or two weeks, depending on usage. (This one-
week to two-week period is based on tests with alkaline batteries; the
performance of other types of batteries may vary.)
If is displayed, you must replace the batteries immediately to
Message B
successfully download an application.
Replace the silver oxide battery every three or four years.
Effects of Replacing the Batteries
Do not remove both types of batteries (AAA and silver oxide) at the
same time. Do not allow the batteries to lose power completely. If you
follow these guidelines and the steps for replacing batteries, you can
replace either type of battery without losing any information in memory.
Battery Precautions
Take these precautions when replacing batteries.
• Do not leave batteries within reach of children
• Do not mix new and used batteries. Do not mix brands (or types
within brands) of batteries.
• Do not mix rechargeable and nonrechargeable batteries.
Install batteries according to polarity (+ and N) diagrams.
•
202
attempt to download an application.
is first displayed, you can expect the batteries to
Appendix C: Service and Warranty Information
Displays this message when you
Message B