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Battery Level Indicator
The satellite status page also features a battery level
indicator, located below the status field to the left of the sky
view, which provides a graphic display of the condition of
the internal batteries.
The battery level indicator is calibrated for alkaline
batteries. Ni-Cad and lithium batteries will not
accurately display the battery level due to voltage
differences. No other receiver functions are affect-
ed by using Ni-Cad or lithium batteries.
It’s always best to store your GPS receiver with the
batteries installed to preserve the internal memory
and data. The GPS 45XL features a rechargeable
lithium battery that will maintain the internal memo-
ry for 3 months in the event that the batteries are
removed or totally discharged.
Screen Backlighting
The GPS 45XL’s automatic backlight feature illuminates
the screen display for a user-defined interval (the default is
15 seconds) after every keystroke. When backlighting is on,
a bulb icon will appear at the bottom left of the sky view.
To turn the screen backlighting on or off:
1. Press the
B
key.
2. To adjust the duration of screen backlighting, refer to the
operation setup section (page 46).
Using the screen backlighting can greatly affect
battery life. If you’re using your GPS 45XL primarily
in daylight hours, you should keep the backlight
timeout at the default 15 second setting.
Reference
Satellite
Status Page
19
A bulb icon will appear on
the status page whenever
the screen backlighting is
on. The backlight will turn
on for the time selected after
every keystroke.
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GPS 45XL Manual C 8/4/98 3:06 PM Page 19