1 Press 1A(OFF) to turn off the
calculator.
ScrewScrew
2 On the back of the calculator, remove the screws and the back cover.
3 Remove the old battery.
4Load a new battery into the calculator
with its positive kand negative l ends facing correctly.
5 Replace the back cover and secure it in place with its screws.
6Perform the following key operation:
O19(CLR)3(All)=(Yes).
• Make sure you perform the above key operation. Do not skip it.
Auto Power Off
Your calculator will turn off automatically if you do not perform any operation for about six minutes. If this happens, press the Okey to turn the calculator back on.