@jjpprrrr Well this is interesting. After entering airplane mode before sleep. The drainage is about 5 % after 7:30 hour.Without Zepp Life the drain over night for 7 hours was 21%. That's 3% per hour. I do not have BBB log now. It's better than 4% but I wish there was a way how to find out what causing this.
The day before I tried to disable bluetooth and WiFi and it did not help. And the airplane mode disables WiFi, bluetooth and mobile data right? Could it be coming from the mobile data ? Will try next night.