Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 408

After is first displayed, you can expect the batteries to function for about one or two
Message A
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 successfully download an
Message B
application.
Effects of Replacing the Batteries
remove both types of batteries (AAA and backup) at the same time.
Do not
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.
• Do not place nonrechargeable batteries in a battery recharger.
• Properly dispose of used batteries immediately. Do not leave them within the reach of
children.
• Do not incinerate or dismantle batteries.
Disposing of used batteries safely and properly
Do not mutilate, puncture, or dispose of batteries in fire. The batteries can burst or explode,
releasing hazardous chemicals. Discard used batteries according to local regulations.
Replacing the Batteries
To replace the batteries, follow these steps.
1. Turn off the graphing calculator. Replace the slide cover over the keyboard to avoid
inadvertently turning on the graphing calculator. Turn the back of the unit toward you.
2. Hold the graphing calculator upright, push downward on the latch on the top of the battery
cover, and then pull the cover toward you.
To avoid loss of information stored in memory, you must turn off the graphing calculator.
Note:
Do not remove the AAA batteries and thebackup battery simultaneously.
3. Replace all four AAA alkaline batteries simultaneously. Or, replace the backup battery.
• To replace the AAA alkaline batteries, remove all four discharged AAA batteries and install
new ones according to the polarity (+ and N) diagram in the battery compartment.
Appendix C: Service and Warranty Information
allow the
Do not
401