Sharp EL-9900 operation manual Procedures for, Replacing unit, Operation

Appendix

Procedures for	When battery power becomes
replacing unit	low, a message will show
operation	indicating that a new set of
batteries	batteries are needed.
	1.	Turn off the calculator’s
		power (@o).
	2.	Turn over the calculator.
		Locate the battery compart-
		ment cover, and open the
		cover as illustrated.
	3.	Replace all four AAA
		batteries as illustrated.
	4.	Replace the battery com-
		partment cover.
	5.	Press O.
		The following message will
		appear.
		If the message does not
		appear, repeat the proce-
		dures from step 2.
	6.	Press O.

Replacing the memory backup battery

Note:

Do not press C. This will clear all the data.

Once every 5 years, the lithium battery will need to be replaced.

The lithium battery is used to maintain the memory of the calculator.

Do not remove the lithium battery while the unit operation batteries are removed; otherwise all the calculator’s stored memory will be lost.

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