Home Forums Apple Help Is iOS 11.3.1 is also draining your battery? Forum Rules | Contact Forum Editor | Report a Post Is iOS 11.3.1 is also draining your battery? techblogger911 20:29 09 May 2018 Locked I have iPhone 6S and I updated to iOS new update 11.3.1. But the problem after installing the update is, it is draining battery quickly. Like I have a battery about 70% and after 15 minutes it reduced to 25% without doing anything. Anyone facing same? john bunyan 08:48 10 May 2018 I have same phone. Battery does seem to drain quicker but in the last day or two I have been using the phone a lot more on its PC mode as it is difficult to get to my PC. Will top up and see how long it lasts. john bunyan 17:28 10 May 2018 100 % to 96 % in 5 hours, light use. bremner 07:07 05 Jun 2018 Many have experienced this battery drain including myself. I had the batetery replaced by Apple, it only took 20 minutes and was done at the Apple Store. Have a read of the Apple press release Re this replacement scheme. Apple This thread is now locked and can not be replied to.