(Fig. 1)

(Fig. 2)

(Fig. 3)

(Fig. 4)

(Fig. 5)

“MEMORY SAFE GUARD” function — The contents of the memory are retained even when the calculator is turned off. A value stored in memory will thus remain until it is changed or until the backup battery runs out.

Automatic Power-Off function (A.P.O.):

This calculator is automatically turned off approximately 7 minutes after the last key operation to save the battery.

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Sharp QS-2130 operation manual Automatic Power-Off function A.P.O