I purchased my watch in April 2019. It worked fine until December 2019. The battery would read some percent above 50 and then all of a sudden the watch would just die. I have had numerous dealings with Apple Support including diagnostic readings remotely, a visit to an Apple store and sending it in for repair,. They say they can't see anything wrong. The issue keeps happening on a very random basis. Just last night the battery read 100% from 10 pm until 2 pm today. During that time I used the workout activity tracker for a 50 minute outdoor walk and the other activity tracker for stretching exercises for 17 minutes. The battery never went lower that 100%. During the past 3 days the watch has just died several times even through the battery shows various levels over 50%. Apple support wants me to send it in again. Has this happened to anyone else? I have Afib and I need my watch to work. Apple has not offered a replacement.