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164 Appendix B: General Information
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.
Replacing the Batteries
To replace the batteries, follow these steps.
1. Turn off the graphing handheld. Replace the slide cover over the
keyboard to avoid inadvertently turning on the graphing handheld.
Turn the back of the unit toward you.
2. Hold the graphing handheld upright, push downward on the latch
on the top of the battery cover, and then pull the cover toward you.
Note: To avoid loss of information stored in memory, you must turn
off the graphing handheld. Do not remove the AAA batteries and
the silver oxide battery simultaneously.
3. Replace all four AAA alkaline batteries simultaneously. Or, replace
the silver oxide 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.
• To replace the silver oxide battery, remove the screw from the
silver oxide battery cover, and then remove the cover. Install the