Why is my iPhone losing battery fast?

My iPhone 4S is losing it's battery quite rapily. Every minute or two it loses 1%, its never been like this. It takes quite a while to charge fully too, it would be on 20% and 15 minutes later it would be on 53%. I just got my cracked screen fixed at the mall, if that has anything to do with it.

I charge it overnight if it doesn't have that much battery too. I've turned down the brightness to way less than half, bluetooth is off, I get Wi-Fi from my house, and auto-brightness is off.

Whenever I read on wattpad, it loses about 1% every 5 minutes or so, but now, it's losing 1% like every 2-3 minutes! Does this mean I have to go get the battery replaced? :/ Or is there any way of making my phones battery last longer?

So 20% per hour of use? Thats not terrible, not as good as mine but its not terrible.

  • 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 5 losing battery? My iPhone is a few months old, it has been working great until a week ago the batter stopped holding. I left it in the car for a few hours and it lost 10 percent. My phone just died at 4 percent battery not one, then when I started charging it it started at 4. Just a minute or two later it went to 13 percent, and it keeps radically increasing. Is there anything I can do?
  • Why is my iPhone 5 losing battery so fast? I got it about a month ago, and the battery's been fine until yesterday. It just started losing battery really fast. This morning, when I put it in my backpack before school, it was at 50%. When I took it out at the end of the day, it was at 36% and I didn't even touch it during the day!
  • Why is my iPhone 4s running out of battery so fast? Obviously iPhones are renowned for low battery lives. But mine is normally fine, i turn my apps off, brightness is never usually high. Though starting yesterday it has been dropping ridiculously quickly, going from 100% at 9am and then within the hour it's gone to less then 30%, my battery isn't lasting longer then two hours before dying, previously it had lasted as long as 8 hours and is heating up alot, can anyone help me out?