Garmin Edge® 20 Owner's Manual

GLONASS: Turns GLONASS on or off. By default, the device 

uses GPS to locate satellites. For increased performance in 

challenging environments and faster GPS position location, 

you can enable GPS and GLONASS. Using GPS and 

GLONASS reduces battery life more quickly than using only 

GPS.

Software Update: Allows you to check for software updates.
About: Displays the software version and unit ID.

Select   > Settings > System > Time.
Time Format: Sets the device to show time in a 12-hour or a 

24-hour format.

Set Time: Allows you to set the time manually or automatically 

based on your GPS position.

Battery type

Rechargeable, built-in lithium-ion battery

Battery life

Up to 8 hr.

Operating 
temperature range

From -15º to 60ºC (from 5º to 140ºF)

Charging temperature 
range

From 0º to 45ºC (from 32º to 113ºF)

Radio frequency/
protocol

2.4 GHz ANT+ wireless communications 
protocol (Edge 25 device only)
Bluetooth Smart wireless technology (Edge 25 
device only)

Water rating

IEC 60529 IPX7*

*The device withstands incidental exposure to water of up to 1 m 

for up to 30 min. For more information, go to 

.

Battery type

User-replaceable CR2032, 3 volts

Battery life

Approximately 3 years (1 hour per day)

Operating temperature 
range

From -10° to 50°C (from 14° to 122°F)

Radio frequency/
protocol

2.4 GHz ANT+ wireless communications 
protocol

Water rating

1 ATM*
NOTE: This product does not transmit heart 
rate data while swimming.

*The device withstands pressure equivalent to a depth of 10 m. 

.

Battery type

User-replaceable CR2032, 3 volts

Battery life

Approximately 12 months (1 hour per day)

Operating temperature 
range

From -20º to 60ºC (from -4º to 140ºF)

Radio frequency/protocol 2.4 GHz ANT+ wireless communications 

protocol

Water rating

1 ATM*

*The device withstands pressure equivalent to a depth of 10 m. 

.

Avoid extreme shock and harsh treatment, because it can 

degrade the life of the product.

Avoid pressing the keys under water.
Do not use a sharp object to clean the device.
Avoid chemical cleaners, solvents, and insect repellents that can 

damage plastic components and finishes.
Thoroughly rinse the device with fresh water after exposure to 

chlorine, salt water, sunscreen, cosmetics, alcohol, or other 

harsh chemicals. Prolonged exposure to these substances can 

damage the case.
Do not store the device where prolonged exposure to extreme 

temperatures can occur, because it can cause permanent 

damage.

Wipe the device using a cloth dampened with a mild 

detergent solution.

Wipe it dry.

A build up of sweat and salt on the strap can decrease the ability 

of the heart rate monitor to report accurate data.

• Rinse the strap after every use.
• Hand wash the strap occasionally, using a tiny amount of 

mild detergent, such as dishwashing liquid.
NOTE: Using too much detergent may damage the strap.

• Do not put the strap in a dryer.
• When drying the strap, hang it up or lay it flat.

Do not use a sharp object to remove batteries.
Keep the battery away from children.
Never put batteries in mouth. If swallowed, contact your 

physician or local poison control center.
Replaceable coin cell batteries may contain perchlorate 

material. Special handling may apply. See 

Contact your local waste disposal department to properly 

recycle the batteries.

Locate the circular battery cover on the back of the heart rate 

monitor.

Use a coin to twist the cover counter-clockwise until it is 

loose enough to remove (the arrow points to OPEN).

Remove the cover and the battery.

Wait 30 seconds.

Insert the new battery with the positive side facing up.
NOTE: Do not damage or lose the O-ring gasket.

Use a coin to twist the cover clockwise back into place (the 

arrow points to CLOSE).

After you replace the heart rate monitor battery, you may need 

to pair the heart rate monitor with the device again.

6

Device Information