iPhone 3GS Battery Issue (iOS 5)

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almost same problem here, but it's rebooting and shutting down on 80%.. =S

before iOS 5 it was working like a charm.. =[

This happens to me at 39 - 35% on my 3GS as well. I noticed that the battery indicated does not show a proper reading.....staying at 100% after full charge for over an hour and with normal use.

My difference is this started happening to me about 1.5 weeks BEFORE the iOS 5 release. I was hoping that it would be corrected with the new OS but no. I've restored to factory settings and it shut off again at the 39 - 35% range.

Similar issue ... My 3GS was running flawlessly until the iOS 5 update. Now it will randomly shut off and will not restart even after plugging it in. After several hours, it will come back on and show that the battery is dead and needs to be charged. It will shut off with as much as 90% battery within only hours of being "fully" charged. Has anyone actually received any help from Apple anywhere in the forum? None oh the posts I have read have had any response. I paid top dollar for this thing and had been very pleased until this. All I expect is for it to operate correctly... Is that too much to ask?

Same with my 3GS and IOS 5 . And I replaced the battery two months ago with a completely new one.

Same here.

I upgraded my 3GS to ios5 to keep up to date, not realising I was being sent back to the stone age. A perfectly fine working phone turned into a useless piece of &()*$&£*()". I am extremely annoyed by this.

Why don't they offer the option to downgrade to ios4? APPLE GIVE ME MY PHONE BACK!!!!!

A couple of days after upgrading to IOS5 on my 3GS started with battery problems, where the phone gets hot and will drain the battery in 3 or so hours. I've also experienced delays in response time and the phone locking up. As suggested on the internet, I've turned off everything that accesses outside data except mail, calendar, reminders and contacts. Basically the phone is now unreliable and all the features that make it useful are now disabled. I don't know if I can downgrade, but need to. If someone knows how to do this, I would appreciate advise. Also is someone from Apple wants to talk to me about the issues, let me know.

It's horrible after upgrading to iOS5..My phone is a piece of crap now..Is there any way to downgrade it?

In my case, the problems started when I activated mobile data and 3G. Turning these two off, mitigated the issue in my opinion. However, turning mobile data off is probably no option for many people.

Same here.

After upgrading my 3GS to iOS5 my phone will drain a fully charged battery empty over night with out anything switched on. Another problem that came with iOS5 upgrade is that everything is much "slower". Just to open Contacts or phonebook can take 4-5 seconds

I am having exactly the same issues being reported here. After upgrading to IOS 5, my 3GS will randomly shut off with 30-50+% battery left and will only turn on when plugged into a battery source. I have been on with Apple and because the phone is still under warranty, I am requesting anew phone. I am sooooo frustrated because I had no issues before the upgrade. Now, the phone is totally unreliable.

Just adding to the chorus--my 3GS shuts off suddenly, and the battery drains VERY quickly, and I have to plug it into my computer to get my phone back (and then I have to let it charge for a long time).

Help! Can I downgrade OS?

When the 3Gs suddenly shuts off I noticed that basically the display background light is shutting off. On the screen one still can see the original image (but its very dark without background light).It seems a bit like the device is not getting sufficient power from the battery.

Yesterday, I turned off all Location services in addition to mobile data, 3G, bluetooth and iCloud services keeping only WIFI activated. This way my iphone "survived" the night and battery charge is still above 90%.

Could the issues have to do with the location services as it is rumored to be the case with the 4S? If so IOS 5.0.1 that will be released within weeks could solve the issues also for the 3Gs.

After replacing the battery my 3GS came back to normal..

Maybe iOS 5 messed up with energy management on degraded batteries.