About The El Backlight - Casio PV-750 Plus User Manual

About the EL backlight

• The PV Unit is equipped with an EL backlight that allows easy viewing
of display contents in a theater, or anywhere else where lighting is dim.
• Note, however, that frequent or extended use of the EL backlight shortens
battery life.
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.
4
Battery Life
Approximately 80 hours
Approximately 40 hours