The fact that oura teams tries to resolve my issue with my battery the first time when they replaced my ring and the second time to get to know the main reason for battery drain one my replaced ring .. this was great. Also, compensating me with three month paid membership.The main reason I believe was when oura introduced oxygen sensing, I have noticed a big drain but I realized later when I was analyze it after oura replies on my concern. Once I closed this feature, the battery is now surviving longer enough as needed to be. Hopefully this feature gets fixed but oura team to minimize battery drain to use this feature during my sleep.Thanks oura team