Hello,
I had my 910XT for about 2 weeks and noticed the watch shuts itself quite often. It always happens when I'm in the range of the ant stick in my computer. It may be related to this thread:
https://forums.garmin.com/showthread.php?86684-910XT-occasionally-shuts-off-during-data-transfer/page3
I'm worried because I may still bring it back to where I got it if it's a defect.
Thanks.