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Rapid battery drain

1570831 over 2 years ago

FR 255 battery goes from 100% to 0% in less than 8 hours. No bluetooth connection, no wifi, no sleep track, nothing.

I think the issue started after last firmware update to v13.21, but not sure.

Does someone know how to downgrade the firmware version so I can try if it works?

0 S.M.R. over 2 years ago

As far as I am aware you cannot downgrade the firmware.

Have you tried to do a long power down of the watch . Holding the power button until it shuts down itself then wait say 20 secs and restart. It is known to sometimes reset some areas and may help. You dont loose HRV etc with this.

forums.garmin.com/.../how-to-reset-watch-after-each-update

0 S.M.R. over 2 years ago

Also look here for some ideas linked to the reset methodology

forums.garmin.com/.../13-21---rapid-battery-drain