Hello,
I had a issue with my first 5x battery draining faster after a software update. So I returned my original 5x for a new one at REI. I purposely did not update the software for 3 weeks to get a baseline of the battery life. I was going through about 8% a day with about 30 minutes of gps daily so I was able to squeeze about nine days per charge. This was on software 3.40 the stock software out of the box. I have no garmin faces or any widgets from the IQ store it was straight stock. So today I updated my watch to version 5.40 hoping that it was just a faulty watch the first time and have already went through 6% in 11 hours. I tried a soft reset already any ideas or have some of you experienced the same thing. Thanks!