mmmm getting worse
have connected to my Mac to back it up so I could try a wipe and restore.
:-(
Not so much - clicking on Back Up Now doesn't have any effect :-( It reports that 'Your iPhone has never been backed up to this computer' I was using Cloud Backups - but want to ensure a full backup before wipe and restore.
Having had to wipe and restore my iPhone 5S many times in the last few months (my Mac was updated building a new install of El Capitan hence no previous backup of iPhone)
Even with Airplane Mode on I am still losing 1% per minute of battery, giving my iPhone a 100 minute battery life - even with no apps running.
I can't backup - so can't do a wipe and restore.
Hard Reboots have no effect.
I do have a 22400mAH portable battery, if I keep the iPhone connected while away from mains power I can extend use of the phone to just over 6 hours.
Guess it is time to start looking at an Android phone and hope it is more reliable :-)