Casio PV-S250 User Manual page 4

The following shows how backlight use affects battery life under controlled
test conditions*.
Backlight Operation
3 minutes per hour
15 minutes per hour
* Test Conditions
• "Battery Life" is the number of hours before battery failure when the
unit is left on (5 minutes of a processing operation and 55 minutes of
continuous display only (no processing operation) per hour in the
Contacts Mode, plus the backlight operation described below). The above
values assume ambient temperature of 20 C, starting with a fresh set of
new batteries.
• "Backlight Operation" is the number of minutes the backlight is turned
on per hour during the display only (no processing operation) period.
• Be sure to use alkaline batteries. Manganese batteries provide very short
battery life.
Turning On the PV Unit
You can turn on the PV Unit either by pressing the Action control on the side of
the unit. You can also set up the PV Unit so it turns on when you tap its screen
with the stylus (screen tap power on).
Note
• Use the procedure under "To turn the screen tap power on feature on and off"
on page 19 to control the screen tap power on setting.
• The screen tap power on feature is turned on when you use the PV Unit for
the first time after purchasing it.
• Even if you close the PV Unit's cover, items in your briefcase or bag that
bump against the PV Unit can cause it to turn on unintentionally, which can
cause premature rundown of the batteries.
4
Battery Life
Approximately 80 hours
Approximately 40 hours