Battery dying at odd percentages

[kjmff5]

Hi I recently purchased an iPhone 5 in great condition off eBay. Since I bought it it will die at random percentages. Sometimes it'll be 20, sometimes 5, 7, or 15. I have never gone below 5 so far. I did do a reset via iTunes and reinstalled everything and that didn't do anything. Any ideas what's going on? I asked Dr. Google and the two options I saw were either one I have a faulty battery or it's because of iOS 7.1. I get about 9-12 hrs of battery life a day(spend a good portion of the day without signal so it's searching) even when dying at 15 percent. When it dies I get a 'plug in with red battery sign'.

What's going on?

 

[T5BRICK]

You probably need a new battery.

 

[iKaushal]

Hi I recently purchased an iPhone 5 in great condition off eBay. Since I bought it it will die at random percentages. Sometimes it'll be 20, sometimes 5, 7, or 15. I have never gone below 5 so far. I did do a reset via iTunes and reinstalled everything and that didn't do anything. Any ideas what's going on? I asked Dr. Google and the two options I saw were either one I have a faulty battery or it's because of iOS 7.1. I get about 9-12 hrs of battery life a day(spend a good portion of the day without signal so it's searching) even when dying at 15 percent. When it dies I get a 'plug in with red battery sign'.

What's going on?

My mom's iphone 3gs had similar issue. It used to die at about 20 or sometimes 30%.

So I wiped it clean via iTunes and installed only bare minimum apps she needed. It's working fine now.

So what I presume is some rouge app is working on ur iphone.

I couldn't pin point the rogue app on her phone as it was my old phone with over 200 apps..now she has about 40 apps only.

 

[Frizers]

This has been happening occasionally (like 4 times) with my 4S since 7.1. Could be the battery but I've certainly never noticed it before 7.1

 

[mlmwalt]

I've been having this issue since my 4s got soaked in a Florida downpour last spring.

It's a cr**shoot once the indicator gets below 30%.

I'm just hoping I can hold out for the iP6 this fall.

 

[ValerieDurden]

It's most likely the battery, I know my 5 used to do similar things right before it was stolen (October), and I was just about to bring it into Apple and have them look at it but thieves don't wait. As soon as I get it back (it was recovered) I am heading straight to Apple to plead my case as my warranty is no longer valid because it expired in January and I am just now getting it back.

 

[eneisch]

I had the same issue with my 1-1/2 year old iPhone 5. Took it to Apple and they ran a battery diagnostic and told me the battery was out of spec. Since I have AppleCare+ they replaced it for free.

There is a big thread about this in Apple discussions. Most say replacing the battery fixes the issue. They also recommend buying a battery replacement kit from Amazon.com if you are out of warranty since it costs less than $10 and is supposedly easy to install.

 

[shawndc1]

i had the same problem with my 5, itll cut off at 27%,15%,20% , all i did was have tmobile switch it for a new 1 since i pay insurance

 

[jonnysods]

Happened to my wife's phone. Apple ran a diagnostic and it turned out that the phone had a battery needed replacing as it was unhealthy.