About 1 month ago my watch shut off. I know it had about 75% battery left so I was very confused. I changed it up and the battery read 100%. It would literally not even last an hour and I could not connect to my phone. I started trouble shooting. I reset to default settings. Turned all extras off. No back light, no WiFi, no heart rate etc. Deleted any customized watch faces. Checked for updates. Seems all current. Able to connect to phone now. It would still only last barely and hour. I gave up for a couple of weeks and then tried again. Reset to default factory setting again. Deleted all data. Turned everything off.It seemed to help a little. I can get it to last for almost 3 hours with no activity tracking. My watch is a couple years old. It use to last a weekish and that was when I was running everyday. S/N 3342406132. Any advice or solutions? Or do I have to buy another watch. My last Garmin VivoActive lasted almost 5 years before I lost it at the bottom of the river. Really feel it should last longer than a couple of years…..