Garmin Forerunner 405CX - Heart Rate Monitor Battery

36 Forerunner 405CX Owner’s Manual
Using Accessories
zones can prevent you from
overtraining and decrease your
risk of injury.
Heart Rate Monitor Battery
The heart rate monitor contains a
user-replaceable CR2032 battery.
NOTE: Contact your local waste
disposal department to properly
dispose of batteries.
To replace the battery:
1. Locate the circular battery cover
on the back of the heart rate
monitor.
2. Use a coin to twist the cover
counter-clockwise so the arrow on
the cover points to OPEN.
3. Remove the cover and battery.
Wait 30 seconds. Insert the new
battery with the positive side
facing up.
NOTE: Be careful not to damage
or lose the O-ring gasket on the
cover.
4. Use a coin to twist the cover
clockwise so the arrow on the
cover points to CLOSE.