My iPhone battery is draining too fast?

My iPhone 5c on IOS 9.1 has started decreasing very fast. It has nothing to do with the update as it started just before I updated my phone. It was fully charged when I went to bed and when I woke up it was dead. I have searched online and done some of the ways to help it but nothing is working, it is continuing to decrease rapidly. Has anyone got any solutions.

You have far too many things running in the background, as automatic updates, etc. Shut down EVERYTHING that does not have to be running in that mode - it only takes a swipe of your finger to update them WHEN you need them. When I travel, there are VERY few things I need to run on AU - and that is different list from when I'm home. You clearly do not WANT to let go of some of the things that are constantly running, and do not understand the difference. RTFM - again.

  • Why is the battery on my iPhone 4S suddenly draining so fast? It used to use a reasonable amount for a smart phone, but starting this week, I can lose 50% of the charge in one day with minimal use.
  • Why is my iPhone 4S battery draining so fast? I have an iPhone 4S that's less the 6 months old and the battery is draining super quick even when it's not being used, for example when it's locked and in my desk draw at work not being used its loosing about 10% in 10 minutes! What should I do?
  • My iphone 5 battery is draining too fast? So i want to know if you think it was my mistake cause i bought it on friday and i was marveled because the battery life was so excellent. Today i went to school and forgot to unplug my phone from the charger and i used it 20 minutes and battery was down by 20 percent, Was it my fault? I always left plugged my iphone 4s and battery was way better than my 5? Any person experiencing this problem?
  • My iphone 5 battery is draining fast? My iphone battery is draining really fast i have every setting possible that could drain battery off i have my brightness on the absolute lowest possible and i have auto brightness off and it drains 1 percent every 2 mintutes and 1 percent every 8 to 10 minutes on standby what's going on? Oh i forgot to add that i only charge it when it is dead or at like 5 percent battery