Casio FX-9750GII-IH Manual De Usuario

E-6

Your calculator is equipped with a backlight for easy reading, even in the dark. You can 
conserve battery power by limiting backlight operation to only when you need it.

S To turn the backlight on or off

Press 

• Changing the Backlight On/Off Key

You can configure the calculator so the backlight turns on when any key is pressed, instead 
of requiring the 

the backlight key” (page 12-2) in the separate Software Version 2.00 User’s Guide. 

The backlight turns off automatically if you do not perform any key operation for a preset 
amount of time (30 seconds or 10 seconds).

• If you perform a key operation, the backlight duration will be extended for the applicable 

preset amount of time (30 seconds or 10 seconds).

• See “To specify the backlight duration” (page 12-2) in the Software Version 2.00 User’s Guide 

for information about how to specify 30 seconds or 10 seconds as the backlight duration 
time.

• Frequent use of the backlight will shorten battery life.

• The following are guidelines that show how battery life is affected by backlight use. It is 

based on a new set of alkaline batteries at a temperature of 25°C.

5 minutes calculation*

1

, 55 minutes display per hour; no 

backlight use

200 hours (80 hours*

2

)

5 minutes calculation*

1

, 55 minutes display, 3 minutes 

backlight operation per hour

190 hours (75 hours*

2

)

5 minutes calculation*

1

, 55 minutes display, 15 minutes 

backlight operation per hour

150 hours (70 hours*

2

)

5 minutes calculation*

1

, 55 minutes display per hour; 

continuous backlight use

  80 hours (50 hours*

2

)

  *

1

 fx-9860G

II

 SD: 5 minutes SD card access

  *

2

 fx-9860G

II

 SD only