BMW Navigation Portable Plus Owner’s Manual AppendixENto > extras > Custom Pois. To change theTourGuide settings, touch Tools > Settings >Proximity Points > Tourguide.Battery InformationYour nüvi contains an internal, non-replaceable,lithium-ion battery. Do not remove or attemptto remove the battery. Doing so could result inrisk of battery fire or damage and injury.The battery icon in the corner of theMenu page indicates the status of the internalbattery. To increase the accuracy of the batterygauge, fully discharge the battery and thenfully charge it; do not unplug the nüvi until it istotally charged.Contact your local waste disposal departmentfor information on properly disposing of theunit.Maximizing the Battery LifeTurn down the backlight (Tools > Settings> Display > Brightness).Do not leave your nüvi in direct sunlight.Avoid prolonged exposure to excessive heat.••About GPS Satellite SignalsYour nüvi must acquire GPS (GlobalPositioning System) satellite signals tonavigate. If you are indoors, near tall buildingsor trees, or in a parking garage, your nüvicannot acquire satellites. Go outside to an areafree from tall obstructions to use your nüvi.When your nüvi has acquired satellite signals,the signal strength bars on the Menu page aregreen . When it loses satellite signals,the bars turn red or clear .For more information about GPS, go towww.garmin.com/aboutGPS.SpecificationsPhysical size: 121.7 mm W × 75.2 mm H ×19.5 mm D (4.79" × 2.96" × 0.77")Weight: 175 g (6.17 oz)Display: 4.3" diagonal, 480 × 272 pixels;WQVGA TFT landscape display with whitebacklight and touch screenCase: Not waterproof (IPXO)operating Temperature range: 32°F to 140°F(0°C to 60°C)Charging Temperature range: 32°F to 113°F(0°C to 45°C)Data storage: Internal memory and optionalremovable SD card. Data stored indefinitely.Computer interface: USB mass storage, plug-and-playHeadphone jack: Standard 3.5 mmCharge time: Approximately 4 hoursUsage: 10 W max.Battery life: 3 to 7 hours depending on usageBattery type: Non-replaceable lithium-ionbatterygPS receiver: High-sensitivityacquisition times*:Warm: <1 secCold: <38 secFactory Reset: <45 sec*Average acquisition times for a stationaryreceiver with a clear view of the sky.