Q: iPhone 4s Battery Life?

my cpu load is 51.16% with nothing running in the background

same as me.

I don't know what to think about that. Same test on iphone4 gives only 6% cpu load.

In the other hand, some app like "systemView" doesn't confirm that.

Managed to increase usage by turning off clock auto update and disabling unwanted notifications.

Today after 6 hrs of being turned on I am now running at 71% of battery.  I am satisfied at that.

Btw, I have an article up at BYTE discussing the state of iPhone battery life, how to improve it, and how to tell if there are problems.Similar to some of the content here but probably faster to read! http://www.informationweek.com/byte/howto/personal-tech/smart-phones/231902163

I'm of the KISS mentality.   I refuse to turn off features that I bought the iPhone for.   What I have done is install Battery Doctor Pro and use that when charging every night.   I have found that my 64gb 4s has become better and better with every charge cycle.   I have EVERYTHING on, except SIRI lift to activate.   All notifications, all location services, Push email for exchange and yahoo mail, etc., etc.....    I now have no problems getting through an entire day, with moderate usage.   I typically make it to bed time with 40%+ left and simply charge it overnight.

I'm certainly looking forward to even better battery life with the next suftware update, but am not at the end of my rope with the current situation.

Has anyone else tried letting things settle out over a week or two without wiping and restoring every other day?   Or am I the only patient one out here????   ;-)

Since Apple thinks that few people are having battery life problems...  If I turn off bluetooth, wi-fi, system location services, etc., I can get about 26 hours of light usage.  With the same settings, I used to get almost 3 days on my iPhone 4.  PLEASE release your bug fixes for the 4S.  I'm ready to become a developer to get better battery life.

I had my phone plugged in over night and unplugged it at 630am this morning.  I had 3g and location finder off and date and time 'set automatically' off.  I listened to music for about 45 minutes from music stored on my phone and at 815am today my battery is already down to 85%.  Thats 15% in less than 2 hours with minimal use!

I have a White iPhone 4s 32g that also has the battery issue.  I made the suggested changes and still have battery issues.  My iPhone 4 32g was great on the battery life.  After updating to ios 5 I noticed a slight battery decrease but for some reason after a week or so it was ok.  Hope there is a fix soon.

What are you complaining about Jasoncable? You're phone is working marvelously. My phone on the other hand only allows for < 6 hours of light usage w/ everything turned off.

I am seriously frustrated and done with appel products. It's been a month now and they have'nt released anything and my new swapped phone gets warm at the back case and I am concerned about the battery life. This phone is way low than my infact everyone's expectations. i am too dissappointed. As much as I love this phone i think its over now. They can't help me and telling me to wait for teh update and by that time I am pretty sure my phone is gonna suffer some sort of physical damage. or may be just fry somthign inside or melt. And what if the new update fixes the battery drainage issue but my phone will still eb in damged situation and apple will say then "oh the problem is fixed now and we can't do anything".

I am done and just gonna pretend that I just lost my $450 plus a hefty bill every month for next three years.

And I've been reading comments here from hundreds of people. Just stop complaining. This was a test phone and we all are screwed up. And i bet you the update will only fix the standby battery life. As soon as I (in this case start using my phone, it starts drinkin battery that just finished a marathon and thirsty as ****).

Angry and frustrated!

I also turned off all iCloud options and also used the account deletion option to plink my iCloud account.  After doing that, I rebooted and my standby time is significantly better.  I was using the iCloud to keep my contacts and boomarks in sync between my iPad and iPhone (found that to be very handy) and I also had "Find my iPhone" turned on.  So, it looks like, in my case, iCloud is also contributing to the significant drain (which I would expect, but not at a depletion rate as signficant as I was seeing).  Seems like it is always chatting with the server because if I delete a bookmark from one device is almost instantly is removed from the other.  Also thought about trying  fetch instead of push for iCloud, but am going to wait on trying that until after Apple puts out the iOS update. 

Took the phone off charge at 6am and it seems to be behaving itself

Siri is on, Location services are on, Emails set to fetch and push.

I would strongly recomment full drain and full charge (18hrs) followed by complete restore as stated previously.

     OK, I've been dealing with the substandard battery life since launch day with my 64GB AT&T 4s.  Of course I've turned on and off every feature imaginable numerous times, I've reset network setings, I've rebooted, I've drained fully and charged fully a dozen times,  I've restored from backup, I've set up as a new phone from DFU mode...You name it, I've done it.

     First observation, My battery life is substantially worse over 3G.  This of course is to be expected.  Apple estimates 6 hours of internet use over 3G and 9 hours over wifi.  My usage looks more like 4 hours and 6 hours respectively.  This is of course mixed usage not strictly internet use so that makes my usage numbers even lower then Apple's estimates. 

     Second observation, and this is kind of a biggie,  the battery life gets progressively worse the longer the phone goes without a reboot.  When I restore the phone I get between 2 and 3 days of absolutely phenominal battery life, after that the life starts going down the tubes.  This tells me that there is a process somewhere within iOS that is getting hung or just not behaving as it should and is quickly cleared up by a restore only to return a few days later.  This also explains why some folks are claiming a cured iPhone after a restore only to see their battery woes return a few days later.  Additionaly, after a restore, my phone's diagnostics will be clear and empty for a couple of days and then it starts throwing error logs like crazy.  I know that apple has always had the ability to download error logs from the earlier iPhones but I can't help but wonder if the new feature in iOS5 for the user to be able to see these logs isn't somehow screwing with the battery life.  My standby time is ok, not great but acceptable.  The usage however is pretty bad.  I realize Apple presents their best case numbers for battery life but I find it hard to believe that they could miss the real world usage mark by that much.  Here's hoping the new 5.0.1 is a good solid fix.  I'm not an expert, I'm not a developer, just a user of apple products who still believes they are the best choice out there for folks who don't want to beat their heads against a wall over their tech.

That system monitor with battery max doesn't show an accurate reading on the 4s, iAssistant does and shows both cores, try that, I had the same high constant CPU reading and it's wrong with the app you mentioned. The other one shows between 1.5 and 8 while I watched it on mine

rogerfromfrance wrote:

 

But one thing bothers me: without installing any application or email account, i noticed that

used time is always the half of standby time!  even by doing nothing. 4 hours later used time is 2 hours!

 

Of course i did all settings about time zone, norifications etc...

 

Also , another point:  i installed an application from the appstore called "System monitor with battery max"

from Tekton technologies.

Running this app on my 4S , the cpu load is shown very high (53.6 %) while doing nothing else.

Same test on my iphone4 gives only 6%!

Someone could report cpu load using same app.?

1. Your usage and standby time indicates that something is causing the CPU to be active half of the time.

2. Even if you turn of the notifications, etc. some of them won't actually take effect until you reboot (power-cycle) your phone.

3. Is your system monitor updated for iOS 5? In the past I used SystemLite and it has crashed too often for me to keep around.