Apple watch battery loss charge immediately after removing from charger

My apple watch after charging immediately loses charge and dies after removing from charging dock.

Things i've tried or worked with:

-extended period of charging (6-8 hours)

-fresh restart and pairing to iphone

-plugged in charger to wall, 2 computers, other chargers

-tried pairing to another iphone.

This began happening almost over night and previously held charge and worked without issue.

I do get the green snake of death if i take it off the charger and takes an extremely long time to get it back up and functioning again.

When taking it off the charger i can load the initial dial screen, slide options and turn things on and off and within 20-45 seconds its dead again.

searching online this seems to be a problem with updates and corrects itself through some of the above actions or waiting. its been roughly 2 weeks now and still no resolution

*off warranty, appx 1.5 years old.