FR245 Music- Battery drain normal ?

I have recently( 1 week ago) purchased Garmin 245 Music.
While running with GPS and music on, battery loses 20 % in one hour. Is it normal ?

Or I shud get a replacement?

  • 17% is normal.
    Compare it with a normal standalone Mp3 player of this size. The values are not much different either
    GPS and MP3 combined in one device naturally causes high battery consumption.
    The Forerunner 245 has the special feature of the ULTRA GPS setting. This significantly increases the time for long runs.