Texas Instruments TI-73VSC Guidebook - Page 347

Appendix C: Service and Warranty Information 341 Replacing the Batteries 1. Turn off the calculator. Replace the slide cover over the keyboard to avoid inadvertently turning on the calculator. Turn the back of the calculator toward you. 2. Hold the calculator upright, push downward on the latch on the top of the battery cover with your finger, and then pull the cover toward you. Note: To avoid loss of information stored in memory, you must turn off the calculator. Do not remove the AAA batteries and the lithium battery simultaneously. 3. Replace all four AAA alkaline batteries simultaneously. Or, replace the lithium battery. • To replace the AAA alkaline batteries, remove all four discharged AAA batteries and install new ones according to the polarity (+ and -) diagram in the battery compartment. • To replace the lithium battery, remove the screw from the lithium-battery cover, and then remove the cover. Install the new battery, + side up. Replace the cover and secure it with the screw. Use a CR1616 or CR1620 (or equivalent) lithium battery. 4. Replace the battery compartment cover. Turn the calculator on and adjust the display contrast (- $ or - #), as necessary. Battery Precautions Take these precautions when replacing batteries: • Do not mix new and used batteries. Do not mix brands or type within brands of batteries. • Do not mix rechargeable and non-rechargeable batteries. • Install batteries according to polarity (+ and -) diagrams. • Do not place non-rechargeable batteries in a battery recharger. • Do not incinerate batteries.