3 Wait 30 seconds.4 Insert the new battery with the positive side facing up.NOTE: Do not damage or lose the O-ring gasket.5 Replace the back cover and the four screws.After you replace the heart rate monitor battery, you must pair itwith the device again.Replacing the GSC 10 Battery1 Locate the circular battery cover À on the side of the GSC10.2 Use a coin to twist the cover counter-clockwise until it isloose enough to remove (the arrow points to unlocked).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 Use a coin to twist the cover clockwise back into place (thearrow points to locked).After you replace the GSC 10 battery, you must pair the GSC10 with the device again.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.1 Turn off the device.2 Place your finger on the top left corner of the touchscreen.3 While holding your finger on the touchscreen, turn on thedevice.4 Select .Maximizing Battery Life• Decrease the backlight (page 12).• Shorten the backlight timeout (page 12).• Select the Smart recording interval (page 8).• Turn on the Auto Power Down feature (page 12).• Turn off the Bluetooth wireless feature (page 9).• Select the GPS Only setting (page 10).Decreasing the Backlight1 Select to open the status page.2 Use and to adjust the brightness.Adjusting the Backlight TimeoutYou can decrease the backlight timeout to maximize the batterylife.1 Select > Backlight Timeout.2 Select an option.Using the Auto Power Down FeatureThis feature automatically turns off the device after 15 minutesof inactivity.1 Select > System > Auto Power Down.2 Select On.Calibrating the Touchscreen1 From the home screen, select > System > Display >Calibrate Screen.2 Follow the on-screen instructions.Locking the TouchscreenYou can lock the screen to prevent inadvertent screen touches.1 Select .2 Select .Unlocking the Touchscreen1 Select .2 Select .Getting More InformationYou can find more information about this product on the Garminwebsite.• 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.12 Troubleshooting