iOS 5.0.1 - Made my iPhone 4S battery performance worse!

There have been other posts indicating that battery use had improved with 5.0.1. I guess it all depends on all your settings (there are a lot that affect battery usage, as has been mentioned in many of the "battery" threads).

You can get a new phone, then. It's still under warranty.

Fun Fact of the Day:
One of Android's many lies is claiming 4G speeds.

Yes, much worse.

I have noticed the same issue too

AUS iPhone 4S, 32Gig Black, upgraded to iOS5.0.1, via OTA (55.6mb download)

Within 6 hours since last charge, and only using twitter/facebook 3 times on it (less then 15mins usage) no phone call nor sms, 45% of battery has gone... Its worse then my iPhone 3G!

Before update it would of been at 95%

Mine is actually much better. Seems to be on par with the 4 I just upgraded from.

I have an iphone 4 and after the update to 5.1 my battery life is awful. 😠

I have an iPhone 4s, and yes, the upgrade to 5.01 has made it worse. Losing 10-15% battery power every hour. This is unacceptable Apple. Why would you release a new product which clearly is not fit for the purpose it was made? If there is no response from Apple as to a real fix, I'll be returning my phone in 7 days. Please fix this issue!

I don't know why so many people are having issues. I have a 4S and I never had battery issues before or after the update. That doesn't make sense at all, why would some people experience battery issues when others don't?

Battery saving tip of the day:

When your phone is charging, be sure to unplug it as soon as it reaches 100%

same here..battery life much worse since updating to 5.1

same here. i am terribly disappointed as i was a Blackberry devotee for 20 years. I waited for this phone. I love it but the battery problem is such that i am inclined to go back to Blackberry. Apple is a great company and they need to figure this out or lose out on millions of other unsatisfied Blackberry users

Hmmm. It actually worked for me. My phone was loosing 5%/hr on standby in iOS 5.0 with everything enabled, location services, etc. 5.0.1 decreased that to 1%/hr.

Background Processes:

I also killed all the background procs. All the procs that are running in the backgraound are restarted in the background even after a reboot. Is this a feature? It seems to me a reboot of the iPhone should kill all background procs and they should only be restarted again opon manually selecting the application. When I first checked the background procs by double clicking the home button, there were 50 or so running. Everything that I had started since buying the iPhone was a background process. This is possibly the difference between users. If some users have procs running in the background that aren't actuallly sleeping, but are chewing up cpu cycles and battery... there ya go. It all depends on the app, who wrote it, and how well it behaves. I for one obtained better battery life by killing these procs.

Just one of the many - I too am having issues with battery life after the update. Drains much faster than 5.0.

I was also in the category of people having an issue prior to the update.

guess i have to join this club.

didn't seem to have battery issues before 5.0.1 (iPhone 4s), but now - wow. full charge last night. picked up the phone and unplugged it when i got up at 630 this morning. it's now just after 2pm and i'm down to ~30%. no calls. connected to wifi all day. haven't played any games or videos. phone's pretty much just sat on the desk and a few web pages when i watched some news this morning.