Hey all. I just wanted to post my results after the FW version 21 update on a 5X. Usually we only see negative battery results posted. I for one, have held off on updating due to the bad battery results posted here. I was still on version 14 and decided to take the plunge and grab 21. First I deleted the custom watch face and started fresh. So far since updating to 21 I have actually seen a little bit better battery usage than before. I would say that it could have been the custom watch face, (Gearmin) but I have noticed over the last 6 months or so that the battery has been depleting faster than when I first put the watch face on over a year ago. Usually I complete a 4.25 mile run and use 6-7%. It is now 5%. Also overnight it would drain 3-4% and it is now 2%. Additionally the overall drain during a non GPS day is lower.
So my thoughts are:
Definitely uninstall any custom watch face prior to updating the FW. If you still want it after the fact, get the latest version.
Reboot the watch after the FW update.
Hope this helps someone that is worried about updating. I will will installing the SC8 watch face next and report back my battery usage after a period of time.
