Hello guys, since updating to ios 9 last week i got heavy battery drain on my iPhone 6 Plus. I normally have everything turned off, so that I get the most out of my battery. Under ios 8.4 I had at least 9-10 hours battery life, with moderate usage about 12-13 hours. Since updating to ios 9.0 (and 9.0.1) my battery lasts about 7 hours (usage time). I did everything I could (reset all settings, clean install via itunes). still no change. I want my battery life back, and I dont want to use LowPower Mode all day long. What should I do? Downgrade to ios 8.4? (I really like Ios 9).