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Well I guess I spoke to soon when I said yesterday that my battery seemed ok. I could chalk it up to playing with the phone all weekend. But today, I was at work and did not use the phone much (certainly no more than normal). My phone died at 11:15 this evening. I have not had an iPhone die on me after a single day of normal use since my iPhone 3G. In fact, most of my use today was simply clicking the screen on to see how much the battery had dropped. On my iPhone 4, I would have had at least 40-50% left at the end of the day with my usage today. I'm fine with trading a little battery life for extra performance. But the battery should still be able to get me through the day before it dies (and should have at least a little to spare if I've not be using the phone excessively). The current situation is unacceptable.

I'm going to let my phone recharge undistrbed to see one last time if it's just the battery calibration (unlikely at this point). If the battery is dying before the end of the day tomorrow, I will be headed to the Apple store for sure.
I'm in the exact same boat as you, on my iPhone 4 I would end the day at around 50% and now my 4S hardly makes it through the day. Will getting a replacement unit even change anything? I doubt it would, this is a software issue from the looks of it. That said, the issue seems to be quite random for many, so a replacement unit might just fix whatever is wrong with the software by chance.
 
Just curious: Did you load your phone from a backup or as a new iPhone?

As a new phone. Today's usage has been about 20 minutes of loud music through low impedance headphones on the bus to work. 1 phone call, about 5 minutes. much dicking around with Siri to entertain the natives (colleagues) quite a number of emails and messages. I don't have percentage displaying but it looks to be at about 80% to me.
 
As a new phone. Today's usage has been about 20 minutes of loud music through low impedance headphones on the bus to work. 1 phone call, about 5 minutes. much dicking around with Siri to entertain the natives (colleagues) quite a number of emails and messages. I don't have percentage displaying but it looks to be at about 80% to me.


This is quality info, much obliged.
 
Tell me about it.

I ventured to use Siri for about 2 minutes within the 56 minutes i've been using my iPhone (i've just been texting and browsing the App Store), and i'm already at 86%

That is unacceptable. I'd prefer to get an iPhone 4 if this is how the 4S runs.

If it's Verizon, I'll trade.

----------

As a new phone. Today's usage has been about 20 minutes of loud music through low impedance headphones on the bus to work. 1 phone call, about 5 minutes. much dicking around with Siri to entertain the natives (colleagues) quite a number of emails and messages. I don't have percentage displaying but it looks to be at about 80% to me.

Sounds normal.
 
I am trying to calibrate my battery right now. If that doesn't work I will restore it and set it up as a new phone. It looks like people who did that are having better luck :/
 
What I did to fix my battery drain

So when I first updated all my devices to ios5 I had horrendous battery life. This is with an iPad 2, iPhone 4, and iPhone 4S

After trawling the Internet, I ended up turning OFF wifi sync
This has dramatically increased battery life on all these devices.

The iPhone 4 used to not be able to get through a whole day, now it finishes with approx 40% at the end of the day

The 4S is in a similar situation, but with a little less battery at the end of the day. I also had to re add all my exchange accounts on the 4S

This is coming from the 4S lasting about half a day after I first got it and had wifi sync on.

So YMMV but I reckon be sure to turn off wifi sync!
 
I had a 3GS and decided to not use my previous sync/backups, and just saved my music/pictures and apps through itunes and set it up as new. I am thoroughly using my phone, prob about 500 texts a day (about half dictated, love that feature), phone calls up to 30-40 min a few times a day, leaving wifi on at home and at work, and I am using about 60 percent of my battery each day.

I was able to go fri to sun before first charge died, and now I am currently waiting for the final 1 percent to fall so I can do the 2nd and final caliberation til next month.

I find the battery life to be quite better than my 3GS and although I have no iphone 4 to compare it to, I think my battery life is quite fine. I am averaging under moderate use a day and a half of use, whereas heavy use like today and i went 1 day, which is all I want, to make it from wall socket charge through the day to another charge...

I do have wifi sync turned off, I was noticing it was trying to sync every now and then even though it wasn't plugged it, and I have location services turned off for apps that don't need it.

The notification center has location services for weather, so every check activates that location GPS icon, can drain the battery...i turned it off, and added the 5 cities I am always in, and if I need to check another cities weather, I ask Siri or I can open my Weather Channel or Accuweather App...
 
I've taken screenshots of my battery life throughout the day and if I didn't charge it twice (from 73%-78%) and from (29%-99%) I obviously would not have made it through the day, as it was at 55% before I began to calibrate it about 30 minutes ago.

Pretty ridiculous as I really have done nothing on the iPhone except:

1. 30 minutes of iMessage
2. 20 minutes of Twitter
3. 30 minutes of Safari
4. 2 hours of Pandora
5. 20 minutes of browsing the App Store

Nothing else. Settings are pretty normal (location based Reminders is off, bluetooth off, almost all apps closed, default brightness, etc.), so I'm obviously getting MUCH worse battery life than my iPhone 4 on any beta of iOS 5.

So far in about half an hour I've managed to get it from 55% to 37%. I turned everything on that I had off above, downloading Navigon (around 1GB), maxed brightness, no locking/dimming, playing a 24 hour YouTube video with max sound output from headphones. Hopefully it doesn't take too long to die.
 
Honestly, the iPhone battery has always been poor.

I never go more than a day without a nightly charge.
 
Any body tried Battery Boost Magic App or Battery Doctor Pro , from the app store... alot of good reviews , maybe worth a shot.
 
My battery life was simply amazing on my iPhone 4. On the 4S, its only so so. Still great compared to other smart phones, but disappointing versus the 4.
 
Software updates will make the battery of the 4s much much better, its a wait and see game, remember apple reads and understands all these issues, updates are really important when big release like 3.0, 4.0 , 5.0 come out, all these issues early owners are having will get fix sooner or later... hopefully apple comes thru again.
 
For all you guys with battery life issues
Is wifi sync turned off in iTunes?

WiFi sync only works when you are plugged into power, it's a non issue.

Anyway, my battery goes down about 3% every 20 minutes while it's in sleep mode. I'm going to try and restore it, first using an iCloud backup so no apps get restored, if that doesn't work I'll restore to factory default. But I will be pissed cause I'll loose my Peggle and PvZ saves.
 
WiFi sync only works when you are plugged into power, it's a non issue.

Anyway, my battery goes down about 3% every 20 minutes while it's in sleep mode. I'm going to try and restore it, first using an iCloud backup so no apps get restored, if that doesn't work I'll restore to factory default. But I will be pissed cause I'll loose my Peggle and PvZ saves.

When I had my wifi sync on and my computer with itunes was open then the iphone would always appear in itunes and if I let the phone sleep for a few minutes then unslept it it would still be connected to wifi. I then turned wifi sync off and after a few minutes of sleep when I unslept it it wouldn't be connected to wifi. This told me that as long as wifi sync was on my phone would always stay connected to wifi.
 
I slept with a 100% battery at 12am,
and I just woke up today with a 65% with no-app left opened at all.

I was right to get a battery case :p.
I guess this might answer why Apple told us to plug the iPhone to the power source/dock to be able to sync wirelessly with the iTunes/iCloud. :D
 
What makes you believe this is true?

The description of WiFi sync in general settings says. "Automatically sync with iTunes on your computer when your iPhone is plugged in to power and connected to Wi-Fi." So your iPhone will not use Wifi sync when it's not plugged in.
 
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