Battery Operating Time; Low Battery Notifications - Polar Electro M450 User Manual

1. Lift the rubber cover off the USB port. Plug the micro USB connector into the USB port in the M450,
and plug the other end of the cable into your PC.
2. Charging appears on the display.
3. When M450 is fully charged,
Don't leave the battery fully discharged for a long period of time or keep it fully charged all the time, because it
might affect the battery life time. Keep the USB port cover closed when not in use.
Do not charge the battery when the M450 is wet.
Do not charge the battery in temperatures under 0 °C / 32°F or over +50 °C / 122 °F. Charging your M450
in an environment where temperature is not within this temperature range may permanently damage the bat-
tery capacity - especially if the temperature is higher.

BATTERY OPERATING TIME

The battery operating time is up to 16 hours with GPS and heart rate sensor. The operating time depends on
many factors, such as the temperature of the environment in which you use your M450, the features you
select and use (e.g. the use of the front light reduces the operating time), and battery aging. The operating time
is significantly reduced in temperatures well below freezing.

LOW BATTERY NOTIFICATIONS

Battery low. Charge
The battery charge is low. It is recommended to charge M450.
Charge before training
The charge is too low for recording a training session.
Charging completed
13
is displayed.