Why is my iPhone battery draining faster than usual?

I have it on for an hour and my iPhone 4s has already lost 20% battery I have turned it on and off in hopes of fixing it but it gets worse and worse and no it isn't abnormally hot

Turn off your notifications lower the brightness all that stuff will increase battery life.

How long have you had the phone? These batteries really start to lose power/life after about 2 years.

  • 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 battery draining so low? So I bought an iPhone 4 two weeks ago and for a week the battery was GREAT. But now everytime I use it for something the battery drains super fast. Only when it's on standby is it still good, any tips?
  • 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?
  • Why is my Internet slower than usual? I use xfinity Internet and out of the blue my phone gets a tad bit slower is it the modem or my phone? I tried disconnecting reconnecting unplugging Internet and plugging back in I'm on 3G iPhone 4