2 Twist the cover counter-clockwise until the marker points tounlocked and the cover is loose enough to remove.3 Remove the cover and the battery Á.4 Wait 30 seconds.5 Insert the new battery with the positive side facing up.NOTE: Do not damage or lose the O-ring gasket.6 Twist the cover clockwise until the marker points to locked.NOTE: The LED flashes red and green for a few secondsafter battery replacement. When the LED flashes green andthen stops flashing, the device is active and ready to senddata.TroubleshootingResetting the DeviceIf the device stops responding, you may need to reset it. Thisdoes not erase any of your data or settings.Hold for 10 seconds.The device resets and turns on.Clearing User DataYou can restore all of the device settings to the factory defaultvalues.NOTE: This deletes all user-entered information, but it does notdelete your history.Select > System > Device Reset > Factory Reset > .Maximizing Battery Life• Decrease the backlight or shorten the backlight timeout(Using the Backlight).• Select the Smart recording interval (Data RecordingSettings).• Turn on the Auto Sleep feature (Using Auto Sleep).• Turn off the Bluetooth wireless feature (Bluetooth Settings).• Turn off wireless connectivity (Wi‑Fi Settings).Using Auto SleepYou can use auto sleep to automatically enter sleep mode after5 minutes of inactivity. During sleep mode, the screen is turnedoff and the ANT+ sensors, Bluetooth, and GPS aredisconnected. Wi‑Fi continues to run while the device is asleep.1 From the home screen, select > Activity Profiles.2 Select a profile.3 Select Auto Features > Auto Sleep.Improving GPS Satellite Reception• Connect your device to a wireless network.Satellite information is wirelessly downloaded to your device,allowing it to quickly locate satellite signals.• Pair your device with a Bluetooth enabled smartphone.Satellite information is sent to your device, allowing it toquickly locate satellite signals.• Take your device outside to an open area away from tallbuildings and trees.• Remain stationary for several minutes.Getting More Information• Go to www.garmin.com/intosports.• Go to www.garmin.com/learningcenter.• Go to http://buy.garmin.com, or contact your Garmin dealerfor information about optional accessories and replacementparts.Temperature ReadingsThe device may display temperature readings that are higherthan the actual air temperature if the device is placed in directsunlight, held in your hand, or is charging with an externalbattery pack. Also, the device will take some time to adjust tosignificant changes in temperature.Viewing Device InformationYou can view the unit ID, software version, and licenseagreement.From the home screen, select > System > About.Replacement O-ringsReplacement bands (O-rings) are available for the standardmount in two sizes:• 1.3 × 1.5 × 0.9 in. AS568-125• 1.7 × 1.9 × 0.9 in. AS568-131NOTE: Use Ethylene Propylene Diene Monomer (EPDM)replacement bands only. Go to http://buy.garmin.com, orcontact your Garmin dealer.Updating the SoftwareBefore you can update your device software, you must have aGarmin Connect account, and you must download the GarminExpress application.1 Connect the device to your computer using the USB cable.When new software is available, Garmin Express sends it toyour device.2 Follow the on-screen instructions.3 Do not disconnect your device from the computer during theupdate process.NOTE: If you have already used Garmin Express to set upyour device with Wi‑Fi connectivity, Garmin Connect canautomatically download available software updates to yourdevice when it connects using Wi‑Fi.AppendixRegistering Your DeviceHelp us better support you by completing our online registrationtoday.• Go to http://my.garmin.com.• Keep the original sales receipt, or a photocopy, in a safeplace.Data FieldsSome data fields require ANT+ accessories to display data.Balance: The current left/right power balance.Balance - 10s Avg.: The 10-second moving average of the left/right power balance.Balance - 30s Avg.: The 30-second moving average of the left/right power balance.Balance - 3s Avg.: The three-second moving average of theleft/right power balance.Troubleshooting 15