Garmin GPS II Plus - Manual (Page 30)

Battery Level Indicator
The Satellite Page also features a battery level indicator, located to the left of the sky view, which
displays the strength of the unit’s batteries (Fig. 24). The battery indicator will not appear if the
receiver is operating off external power.
The battery level indicator is calibrated for alkaline batteries. Ni-Cad and lithium batteries
will display the battery level differently due to voltage differences. No other receiver
functions are affected.
The GPS II + features an internal 10-year lithium battery that will maintain the unit’s memory
when the receiver is not running off batteries or external power.
24
Reference
Fig. 24
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