Loading ...
Loading ...
Loading ...
NOTICE
To prevent corrosion, thoroughly clean and dry the contacts and
the surrounding area before charging or connecting to a
computer. Refer to the cleaning instructions in the appendix.
1
Align the charger posts with the contacts on the back of the
device, and connect the charging clip securely to the
device.
2
Plug the USB cable into a USB charging port.
3
Charge the device completely.
4
Press to remove the charger.
Tips for Charging the Device
1
Connect the charger securely to the device to charge it using
the USB cable (Charging the Device, page 25).
You can charge the device by plugging the USB cable into a
Garmin approved AC adapter with a standard wall outlet or a
USB port on your computer. Charging a fully depleted battery
takes up to two hours.
2
Remove the charger from the device after the battery charge
level reaches 100%.
Specifications
Battery type Rechargeable, built-in lithium-ion
battery
Forerunner 645 battery life,
watch mode
Up to 7 days with activity tracking,
smartphone notifications, and wrist-
based heart rate
Forerunner 645 battery life,
activity mode
Up to 14 hr. with GPS and wrist-based
heart rate
Forerunner 645 Music battery
life, watch mode
Up to 7 days with activity tracking,
smartphone notifications, and wrist-
based heart rate
Forerunner 645 Music battery
life, watch mode with music
Up to 8 hr. with activity tracking,
smartphone notifications, wrist-based
heart rate, and music playback
Forerunner 645 Music battery
life, activity mode
Up to 14 hr. with GPS and wrist-based
heart rate
Forerunner 645 Music battery
life, activity mode with music
Up to 5 hr. with GPS, wrist-based heart
rate, and music playback
Water rating Swim, 5 ATM
1
Forerunner 645 Music media
storage
3.5 GB (approximately 500 songs)
Operating temperature range From -20º to 60ºC (from -4º to 140ºF)
Charging temperature range From 0º to 45ºC (from 32º to 113ºF)
1
The device withstands pressure equivalent to a depth of 50 m. For more
information, go to www.garmin.com/waterrating.
Forerunner 645 radio
frequency/protocol
2.4 GHz @ 9 dBm nominal
• ANT+ wireless communications
protocol
• Bluetooth 4.2 technology
• Wi‑Fi wireless technology
13.56 MHz @ -40 dBm nominal, NFC
wireless technology
Forerunner 645 Music radio
frequency/protocol
2.4 GHz @ 8 dBm nominal
• ANT+ wireless communications
protocol
• Bluetooth 4.2 technology
• Wi‑Fi wireless technology
13.56 MHz @ -40 dBm nominal, NFC
wireless technology
Device Care
NOTICE
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.
Cleaning the Device
NOTICE
Even small amounts of sweat or moisture can cause corrosion
of the electrical contacts when connected to a charger.
Corrosion can prevent charging and data transfer.
1
Wipe the device using a cloth dampened with a mild
detergent solution.
2
Wipe it dry.
After cleaning, allow the device to dry completely.
TIP: For more information, go to www.garmin.com/fitandcare.
Replacing the Bands
The device is compatible with 20 mm wide, standard, quick-
release bands. Go to buy.garmin.com, or contact your Garmin
dealer for information about optional accessories.
1
Slide the quick-release pin on the spring bar to remove the
band.
2
Insert one side of the spring bar for the new band into the
device.
3
Slide the quick-release pin, and align the spring bar with the
opposite side of the device.
4
Repeat steps 1 through 3 to replace the other band.
26 Device Information
Loading ...
Loading ...
Loading ...