After updating my iPhone 7 128GB to iOS 15 I noticed that the battery drains too fast in standby. I loose 10% every hour when the screen is off. Moreover, I even tried to completely turn the phone off and see what happens. The result was bad. It lost almost the entire battery during the night. After such disappointing results I decided to replace battery but this didn’t help. Standby drain was still the same and now I don’t know what to do. It seems to me that there is a software issue which Apple either hasn’t fixed yet or integrated deliberately in order to make me buy a new iPhone. Anyway, I’m not going to buy apple products anymore because of this attitude to customers.
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