54 nüvi 310/360 Owner’s ManualAPPENDIXBattery GaugeThe battery icon in the upper-right corner of the Menu page indicates the status of theinternal battery. Periodically, you might notice that the battery gauge is not completelyaccurate. To increase the accuracy of the battery gauge, fully discharge the battery andthen fully charge it without interrupting the charging. For best results, do not unplugthe nüvi until it is totally charged.Battery 3/4 fullBattery charging or connected to external powerBattery 1/4 fullBattery 1/2 fullFull batteryAbout GPS Satellite SignalsYour nüvi must acquire GPS (Global Positioning System) satellite signals to operate.If you are indoors, near tall buildings or trees, or in a parking garage, the nüvi mightnot acquire satellites. Go outside to an area free from tall obstructions to use yournüvi, or close the antenna to turn off the GPS and use it indoors.When the nüvi acquires satellite signals, the signal strength bars on the Menu page aregreen . When it loses satellite signals, the bars turn red or disappear .Touch the signals strength bars in the upper-left corner of the Menu page to view GPSinformation. Touch any where on the screen to return to the Menu page.