Yea I did it twice since iOS 11.03 to 11.1 to 11.1.1...it’s so bad that reading and  typing this reply took 2% lol? Heartache to see how fast it drain, don’t even bother checking the phone often nowadays coz batt drop every single thing I did ie login fb 1%, switch to insta another 1%, switch to WhatsApp reply few messages 1%...worse is every night when I go to bed at 100%, next morning I’ll see 75-80%...been like that for the last 8 days...