iPhone 5 battery drops to 20% from around 40% suddenly

I have the exact problem since my iPhone 4.
When I purchased my iPhone 5, I thought Apple cound finally get rid of that annoying problem.

It is quite susprising to see that Apple still brings that problem to iPhone 5.

What Apple Care Service was told me that it's nothing to do with the software.

She said that she saw the issue at my battery (hardware) and suggested me to replace my iPhone at local Apple Service Centre.

😟

Do basic trouble shooting, Restart, Reset, Reset All settings > Restore > Repair

Get a diagonsis run on your battery if it appears in the red, they'll go ahead and just service the device.

The thing is that there is no Genius Bar here in Singapore.
I can only get replacement with refurbished iPhone if something wrong with my iPhone.

I will do reset and all that. If this cannot help, I only have to get replacement. There are not many choices available.😟

I myself have the same problem ! IPhone 5 16gb IOS 7.0.4 ! Curse you apple your ******* me off

i got he same issue, it was 68% when I got face time call, cannot pick it as it show me battery drained. put tp charge and show 68% again. I had a chat with vable off and battery draint to 2% in 3 minutes. Is apple going to resolve this issue of the $700 thing turn to be a **** piece of Apple. No trust on Apple any more. Will not purchase any Apple product. I am trying restore and see if it works.

Just got my battery replaced, but the issue with drainage was still going on... The new battery drained in 7 hours in idle and later the phone didn't accept charge, took it back to a Genius Bar and I was told a piece was lose, brought it back to my place, the phone doesn't charge. I'm going back today ... Hopefully they can fix what they have done, before short lasting battery, now it doesn't work due to no charge.

Same issue just started to happen

Exactly same problem since updated to 7.0.3, now on 7.0.4, still there, really annoying

I know several friends have this problem too

I'm using iPhone 5

Mine too. How do I know if I need a new battery? I will try the restore, but I am not confident in that result. I also live a long way from any apple store. *sigh*

Hi,

I've been dealing with these issue for a little while now, i tried almost everything in this thread:

I drained my battery all the way ( even tho sometimes it shut down when it was in 10%)

I've made the charge-discharge weekly cycles where you drain the whole battery once but the other days you keep it over 50%)

Restored the iphone in itunes..

Nothing seemed to work.. i was about to go and get a new battery but then i read a post where the issue seemed to be software after the ios7 update... so i dont know why.. but i thought that maybe the jumps where ocurring because of some software fault on the numbers on the battery meter... lets say whenever your phone reached X number because of the software problem it dropped down to 20% or what not..

So just for fun i tried fully charging the fun i went to

GENERAL--> USAGE -->> Battery Percentage and turned off the battery percentage number display in the iphone .

I dont know if its mentally better.. or actually better.. but in my case, the sudden drops are over.

I wish someone would tried it and tell me if this actually helps..

Same issue with the iPhone 5...

It is good finding. I have removed battery life percentage and my battery life is very good now. I have used up only 40 %[ checked from battery app] in 24 hrs.

Thanks of the post

Yes!, It does help. A lot..

Great find 😀

Another thing I have been trying is to turn off 3G/4G untill i need it, the 4G battery consumption is just crazy, sometimes I can run out of 30-40% charge by using 4G in 15 minutes.

Hi,

I faced the same problem for my iPhone 5 running on iOS 7.0.3. Will go to the Apple store and check if some Genius can tell that my battery was in Red and give me a replacement. I have my phone under Apple's warranty. Will let all know what response i get.

gkprabhakar: "... the 4G battery consumption is just crazy, sometimes I can run out of 30-40% charge by using 4G in 15 minutes."

This is not normal if your battery is in proper working order.

My daughter had the same issues for the past month with her iPhone5. I had her try all the things I mentioned in my above post, with no luck. Went to Apple and her battery was also in the red.

I'd say if you're having these problems to try cycling the battery and do an iOS restore as the Apple support page suggests (https://getsupport.apple.com/Issues.action). If that does not work and you live close to an Apple store, just make an appointment, chances are your battery needs replacing.