Hello. I have a Forerunner 265 and my watch has been working great - Love the watch. I have had it for 2.5 years. Battery would last over a week on a charge... this includes some GPS activities and other things such as Weightlifting. I don't know if it happened right after updating to firmware 27.09 as I can't remember when that happened but I would say in the last week or 2 the drain has been crazy fast.... Just yesterday it went from 50% in the morning down to 25% in the afternoon and then all of a sudden dropped to 1% and asked to be put into powersave mode. I contacted Garmin and they said they don't know of any other instances of this happening with the 265 and said they offer the exchange as I am 1.5 years past warranty. Anyone else out there in the same boat as me?