Texas-instruments TI-73 EXPLORER User Manual download pdf (Page 346)

340

Appendix C: Service and Warranty Information

99APPX-C.DOC Appx C:Battery/Service and Warranty Information, English Julie Hewlett Revised: 02/27/01 4:35

PM Printed: 02/28/01 11:29 AM Page 340 of 6

Battery Information

The TI

73 uses four AAA alkaline batteries and has a user-

replaceable backup lithium battery (CR1616 or CR1620).

When to Replace Batteries

When the battery voltage level drops below a usable level, the

73 displays the following message when you turn on the

unit.

Generally, the calculator continues to operate for one week

after the low-battery message is first displayed. After this

period, the TI

73 will turn off automatically and the unit will

not operate. Batteries must be replaced. All memory is

retained.

Note

: The operating period following the first low-battery

message could be longer if you use the calculator infrequently

or shorter if you use the calculator frequently.

Replace the lithium battery every three to four years.

The calculator does not let you install new software or

application programming if the batteries are too low.

Effects of Replacing the Batteries

Do not

remove both types of batteries (AAA and lithium

auxiliary) at the same time. Do not allow the batteries to lose

power completely. If you follow these guidelines and the steps

for replacing batteries on the next page, then you can replace

either type of battery without losing any information in

memory.

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Texas-instruments TI-73 EXPLORER User Manual Page 346