I have a not so old 7 Plus, circa 7 months old. In the last few days I have started to get quite significant battery drain. For example I went and visited my son this afternoon, when I left home I had circa 90 percent power available, I was away a couple of hours and when I returned I had 39% power. I have noted this rate of discharge over the last week or so. I have not loaded any new Apps and do not have a huge amount of Apps installed. When I checked the battery app there is no significant battery use by any App and the highest usage is being attributed to the Home/Lock screen. I have also noted that the phone is warm, not uncomfortably hot definitely a lot hotter than normal. I do not have a cover on the phone.

I am not doing anything different than usual and I have tried power cycling the phone. I have also deleted and repaired the Apple Watch. Are there hidden Apps that do not show in the Battery App that could be draining the battery? Has anyone have any suggestions? I was going to do a reset when IOS11 is released but may have to do it earlier.

Any help would be gratefully received.