Sleep pulse Ox and battery drain

I have recently tried sleep pulse Ox and not sure what use I have of the info i get. Discover any kind of sleep disorder?

However, it looks like I'm having really heavy battery drain if this function is activated. 14% down last day/night. Normal is 5-6% including 1-2 hour of workout with ext. hr and music player. (indoor cycling, no gps)

What is yours experience?