Garmin Edge® 20 Owner's Manual

The LED flashes red to indicate a low battery level after two 

revolutions.

Locate the circular battery cover 

À

 on the back of the sensor.

Twist the cover counter-clockwise until the marker points to 

unlocked and the cover is loose enough to remove.

Remove the cover and the battery 

Á

.

TIP: You can use a piece of tape 

Â

 or a magnet to remove 

the battery from the cover.

Wait 30 seconds.

Insert the new battery into the cover, observing polarity.
NOTE: Do not damage or lose the O-ring gasket.

Twist the cover clockwise until the marker points to locked.
NOTE: The LED flashes red and green for a few seconds 

after battery replacement. When the LED flashes green and 

then stops flashing, the device is active and ready to send 

data.

Before you can update your device software, you must have a 

Garmin Connect account, and you must download the Garmin 

Express

™

 application.

Connect the device to your computer using the USB cable.
When new software is available, the Garmin Express 

application sends it to your device.

Follow the on-screen instructions.

Do not disconnect your device from the computer while the 

Garmin Express application downloads the software.
TIP: If you are having trouble updating the software with the 

Garmin Express application, you may need to upload your 

activity history to the Garmin Connect application and delete 

your activity history from the device. This should provide 

sufficient memory space for the update.

Garmin Express provides easy access to these services for 

Garmin devices.
• Product registration
• Product manuals
• Software updates
• Data uploads to Garmin Connect

• Go to 

• Go to 

• Go to 

, or contact your Garmin dealer 

for information about optional accessories and replacement 

parts.

• Turn off the Bluetooth wireless feature on your Edge 25 

device (

).

• Turn off GLONASS (

).

The device may need a clear view of the sky to acquire satellite 

signals. The time and date are set automatically based on the 

GPS position.

Go outdoors to an open area.
The front of the device should be oriented toward the sky.

Wait while the device locates satellites.
It may take 30–60 seconds to locate satellite signals.

If the device stops responding, you may need to reset it.
NOTE: Resetting the device may erase your data or settings.

Hold   for 15 seconds.
The device turns off.

Hold   for one second to turn on the device.

Replacement bands (O-rings) are available for the standard 

mount in two sizes:

• 1.3 × 1.5 × 0.9 in. AS568-125
• 1.7 × 1.9 × 0.9 in. AS568-131
NOTE: Use Ethylene Propylene Diene Monomer (EPDM) 

your Garmin dealer.

You can view the unit ID, software version, GPS version, and 

software information.

Select   > Settings > System > About.

Some data fields require ANT+ accessories to display data 

(Edge 25 device only).
Avg. Speed: The average speed for the current activity.
BPM: Your heart rate in beats per minute (bpm). Your device 

must be connected to a compatible heart rate monitor.

Cadence: Cycling. The number of revolutions of the crank arm. 

Your device must be connected to a cadence accessory for 

this data to appear.

Calories: The amount of total calories burned.
Distance: The distance traveled for the current track or activity.
HR Zone: The current range of your heart rate (1 to 5). The 

default zones are based on your user profile and maximum 

heart rate (220 minus your age).

Speed: The current rate of travel.
Time: The stopwatch time for the current activity.

Troubleshooting

7