Venu 2 Plus - Battery Drain during sleep

Do you have the pulse ox on during sleep? That drains battery. 

pulse ox - tracking mode is set at all day

full charged last night before sleep, woke up after 6hrs sleep again left with 80%

but from morning 8am until now 8pm batt only drop to 74%.

no workout, steps count about 8k

any other possible issue?

I only lose about 5% or so during sleep. 

Just a wild guess… am also not sure if it is possible but what is your screen setting for sleep mode or do you have sleep mode? I was thinking maybe your screen stays on due to the watch touching your duvet draining battery. I know that in sleep mode screen is turned off and only reacts to a push of the button. Also try to put it for one night on your other wrist and see if that makes a diiference and turn of Bluetooth on your phone off . Maybe something in the background is running and connecting to your phone It is just guessing but you write during the day reacts normal….so I assume pulse ox setting is the same for day and night