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iPhone 5 battery life is way worse than iPhone 4

I just got an iphone 5 and I restored a backup from my iPhone 4 so I have the same settings. But the iphone 5 drains way faster than my two year old very well used iPhone 4 which is running 5.1.1. Is it because of IOS 6? Just leaving it sitting overnight lost about half the battery. My iPhone 4 hardly uses any battery while it sits overnight.


Or do I have a bad battery on my new phone?

Posted on Sep 22, 2012 1:41 AM

Reply
3,614 replies

Sep 26, 2012 9:43 AM in response to holdrege

I've been watching this thread as I too have experienced very poor battery life on my new iPhone 5. Compared to my 2-1/2 year old iPhone 4, the new 5 performed well below what the 4 was giving me.


I did perform a regular restore via iTunes (new phone set-up) and gave it a day of use. I would get about an hour or 2 of stand-by with the battery indicator staying at 100%. I thought: appears like the restore did it! It didn't. After using it the indicator would drop way too fast. This while just browsing, texting on Wi-Fi.


So this morning I performed a DFU restore. Let the battery charge up to 100% and have been using since I disconnected it from iTunes. I've spend the past 40 minutes modifying settings, tweaking apps and performing all my log-ins. 40 minutes of constant use has resulted in NO battery loss. Still sitting at 100%. Very similar to how my iPhone 4 performed.


Will run this charge cycle out today and fully charge over night. Will post any changes, but it appears the DFU restoration may well be the remedy.

Sep 26, 2012 9:57 AM in response to sjsutton

I said the same thing! However at this point in the day now it's dropped faster, i've played some music made a few phone calls and done some text messaging and i'm down to 85% now phone i showing i've used it for over 2 hours today but in total i've calculated i've only used it for about 1 hour and 20 minutes. Not sure what's going on, only app on phone is facebook, twitter and pandora and not one of them is running, no email even setup right now. I made an appointment for friday for the genius bar just to be sure it's not the phone.

Sep 26, 2012 10:23 AM in response to areo11706

I have 1-hour and 15 minutes of use (and standby) on the phone now - this use included watching about 15 minutes of Rise of the Planet of the Apes (locally) and about 10 minutes of SiriusXM streaming. My indicator is at 93%.

Going to let it sleep for the next hour and see if I lose any of that 93%. If DFU remedied the problem, in one hour it should still be at 93% or 92%. If it's under 90, safe in assuming the issue persists.

Sep 26, 2012 10:26 AM in response to t.katz

>do you have WiFi sync enabled? (not necessarily using it, just checked in iTunes).


No. After seeing that usage stat I wonder if ios 6 is not shutting down background apps (like it used to). I'm going to kill all apps before bed time tonight and see if there's a difference.


And FWIW I only have one mail account set to push and it's an Exchange account.

Sep 26, 2012 10:32 AM in response to areo11706

OK. As posted yesterday, doing the DFU restore (then loading everything through a backup restore--not setting up as new phone) and conditioning the battery really did help. However, throughout the afternoon it was worse than I had anticipated in the moring, losing about 10% per hour (better than my original 2-3% every 5 min, but still), so I went to the Apple Store and I swapped it out for a new one.


The guy ran diagnostics on my phone ad couldn't see anything wrong with the battery. BUT, he did notice the weird jump in usage time while the phone was idle that some of us were/are experiencing. He said the possibility was a faulty processor that was continuing to run, thus causing the battery to drain to quickly. He said he wasn't convinced that was it, because the phone would have also been running hot (note to all of you with this issue).


So my new phone--not any better on battery life at this point. He recommended I NOT restore from backup (confirming what so many of you are saying) and set up as a new phone. Yuck, but OK. I wanted to drain the battery, so I didn't want to plug in and sync at this point. I also wanted to monitor battery life, so I only downloaded the few apps I wanted for the evening, then went ahead with my normal light usage (a few texts, a few games, reading, checking email). Phone had about 80% out of the box at 7:00 last night. By 9:00 this morning, I was at 38%. Doesn't seem great. Back to square one...

Sep 26, 2012 11:42 AM in response to Evil Timmy

Just went and visited my local Genius Bar and they said, "definitely not normal" but as far as their diagnostics were concerned everything seemed fine. They replaced the phone and I'm in the process of re-syncing everything and restoring the phone. I will update on my findings in a day or so once I have time to take it for a decent test run. FINGERS CROSSED!

Sep 26, 2012 12:15 PM in response to holdrege

I've been reading this post for a bit, and I too am having these battery issues!!! Here is what I have done to date:

  • originally set up my device from a backup from my iphone 4
  • have completed 3 full charges (including trickle charge beyond 100%) and drain to 0% until phone shuts off - this did not work
  • I have wiped the phone and set up as new, and downloaded my contacts and calendar from the cloud
  • I have wifi turned off
  • location services mostly all off
  • maps, traffic, all off
  • i have 3 email accounts set up and all of the push notifications and push email are off


The only draining utilities I have on are location services for Find My Phone, Siri, and Bluetooth because I use this in my car a lot. I just don't get it...my iphone 4 had the same types of things running (even more) and i did not have to futz around with it...looking for running processes, etc. The iphone is supposed to be EASY...i should not have these kinds of issues because i backed up from a restore of my iphone 4. I am currently sitting at 11% with 3hours, 29 min of usage and 16 hours, 17 minutes of standby. My co-worker's iphone 4s is sitting at about the same usage and standby, and they are at 77%!!!


I have called apple support and they said to wipe my phone and set up as new, which i did, and it did not work.


I have a genius bar appointment in 2 hours, but i feel that they are going to test the battery...it will be fine...and then offer me a new phone. What is the point of taking a new phone if this is an ios issue?


I guess my question is...what next? Like i said before...iphone SHOULD be easy...i should not have to be looking for hidden running processes...this is NOT MY JOB!! This is apple's job, and the reason we paid $800 for the phone. Do you all feel this is an ios issue that will be fixed in the next update? When do you think an update will be out if so? Do you think it is a defective battery? I have seen some posts where techs have contacted people with the issue asking if they can monitor the phone to see what is going on.


Sorry for the rant...just not sure what to do and tired of carrying around my charger because my phone won't last the day on a charge. Any suggestions?

iPhone 5 battery life is way worse than iPhone 4

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