AW 4 battery went from 100% to 0% overnight - any ideas?

[JWGold]

I wear my Apple Watch to bed for purposes of sleep tracking. I use the Autosleep app and have never had an issue. Usually by morning, I am at around 80% to 85%. Last night, I charged my watch to 100% as usual and went to sleep. When I woke up this morning, my AW was completely dead with no battery life left. This has not happened before and wondered if anyone had any similar experiences with an unusual battery drain?

 

[deeddawg]

Reboot the watch. Could be a stuck app holding something open that's drawing power (GPS, phone, etc)

 

[xraydoc]

Could also have been sleeping in a funny way that kept activating the display.

 

[44267547]

Hard reset. Hold down the power button and digital crown until you see the Apple logo, should clear any type of glitches. But still, that’s pretty drastic to go from 100% to zero in that timeframe. Also, Apple can conduct A free battery test to determine the overall health of the battery.