Check your background app refresh as well. It's under Settings>General underneath Usage. If your apps are constantly refreshing that can be a huge drain.
bellasocks: mine was doing that w/ a former update and I ended up just buying a new battery since when I went into the apple store they said my battery was old & worn down despite it starting after an update
lorrieu: Memphisholli: paletpc: sparkeespud: One of the websites I just found said kill all your tasks (double tap the home button then swipe them up. Then hard boot your your