Texas Instruments TI-82 User Manual - Page 256
Battery Information - 82 batteries
UPC - 033317086337
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Battery Information The TI.82 uses two types of batteries: four AAA alkaline batteries and a lithium battery as a backup for retaining memory while you change the AAA batteries. When to Replace the Batteries As the batteries run down, the display begins to dim (especially during calculations), and you must adjust the contrast to a higher setting. If you find it necessary to set the contrast to a setting of 8 or 9, you will need to replace the batteries soon. You should change the lithium battery every three or four years. Effects of Replacing the Batteries If you do not remove both types of batteries at the same time or allow them to run down completely, you can change either type of battery without losing anything in memory. Battery Precautions Take these precautions when replacing batteries. ¦ 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 batteries. B-2 Reference Information
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