During last 2-3 days the battery started to discharge very quickly (3-5% per hour). Updated watch to latest version, which showed no improvement in battery performance. When trying to charge again Vivoactive 4S became very hot and won't turn on since.
I have been informed that my watch will have to be replaced.
I have only had the watch for 2 years and it hasn't been exposed to any extreme conditions.
I would have expected better quality... hope the support center and replacement will go smoothly