Increased Battery Drain After Updating Software

We have identified a possible issue with software version 13.40 for the fenix 5 that can cause additional battery drain to take place. If you are experiencing increased battery drain on your fenix 5, update your software to version 14.20, or later. To update the fenix 5 software, see -  How to Install Software Updates to my Garmin fenix 5 Series Watch

If you have already updated to software version 14.20, or later, and you are experiencing higher battery drain than normal, refer to this article for tips on conserving battery -  How to Improve the Garmin fenix 5 and fenix 5s Battery Life