iPhone 4s Battery Life?

2 hours and 50 minutes of just laying standby. Drained 20% of my battery. In the usage screen i see that it says

Usage: 2 Hours, 50 Minutes

Stanby: 2 Hours, 50 Minutes

It would be nice to have some type of "Task Manager" so i can see whats running. =)

@killhippie: you are right, they are diagnostic data rather than crash-reports.

What remains is that usage time goes up at a rate of roughly 50% of the time the phone is in standby. That is with *everything* in the Multitasking bar killed and with wlan & mobile data disabled.

I will do some experiments with (again) deleting my Mail-Accounts as the ActivityMonitor still shows the MobileMail as running despite having killed that thing vom the Multitasking bar...

@bjournfot: there are some activtyMonitors in the AppStore - your data is interessting, as my UsageTime goes up as half the rate of elapsed time (vs yours at the same rate) and my battery-drain is half of yours. Perhaps in your case are both cpus enaged in silly things an only one in my case?

By the way, my 3GS with iOS 5 ist not showing this behaviour, i.e. usage time is not going up in standby and no battery drain.

Message was edited by: jensfromploen: typos + comment

There is iStat in die AppStore. Maybe more...

Just chucking my 2 pence, (or 5 cents if you are a yank) into the pot.

The iPhone 4s I got had atrocious battery life but what I noticed was that the Settings, Location Services, System Services, Setting Time Zone was constantly accessing my location, and therefore constantly pinging GPS. I have since turned that off, along with Diagnostics & Usage and Location-Based iAds, and also turned off Settings, General, About, Diagnostics & Usage.

I ran the phone down till it turned itself off, then gave it a full charge over night and now battery life seems fine.

Under Settings, Location Services, System Services turn on Status Bar Icon so you can check if something is constantly accessing the GPS.

Remember, as with any smart phone, running any O/S, you are never going to get more than a working day out of it, if you use it with any kind of zeal, before you have to charge it.

This is purely anecdotal, but it has worked for me

@Morituri: as I wrote - these are the obvious things that I already switched off & tried. It does not seem to be the solution for every case of battery drain.

I used iPhones for the last almost 4 Years - never experienced anything like this. Even a Smartphone in standby lasts several days.

I installed istat and i got kinda scared! My phone has an average load over the last 5 minutes for 80% Load and 15 min is 50%....it seems to be constant over 30%

To bad i cant see what task is doing what. =(

The posting from NC Kishore on Page 20 worked for me. I had restored from my previous 4 settings which I think may contribute to the drain.

I conditioned the battery with 3 or 4 complete drains and then deleted anything that could be restored manually.

I deleted all my apps to save time inthe backup.

I then backed up to iCloud and did a complete wipe of my phone and then restored from the cloud back up.

It is worth initially restoring from your previous phone because this enabled me to keep my text conversations from my previous phone but you then have to backup to iCloud and do a full wipe and reset then restore from the cloud.

My battery life has gone from lasting about 8 hours tops to what I would call a normal expectancy.

I unplugged it at 8:00pm last night and went down the pub. Took a few vids, did a few texts and checked Facebook etc... I came home about 2ish forgot to plug my phone in but when I woke up at 9:00 this morning, I still had approx 65% which is far better than I was getting.

Hopefully that's it solved for me.

Thanks to NC Kishore, cheers mate...

My all new iPhone 4S also suffers from massive battery drain. I have an app called iSystem Info to see the CPU load. My iPhone often gets very ⚠ hot and when I start iSystem Info I can see a CPU load between 75% and 85% all the time. The load even stays at that level when I clos all the apps.

Another problem I noticed is permanent GPS logging. When I use an app like facebook, the GPS symbol stays active even after switching to an other app or closing this app. I disabled the localization now completely - but this can not be the solution for this problem. 😠

My iPhone 4 lasted at least two days befor I had to recharge it. My iPhone 4S lasts sometimes only a couple of hours. So Apple: What is the solution? When will we see an iOS update to fix this?

Stefan

Apple needs to do something about this problem. I just bought a 4s today and will be returning it tomorrow. I think they released a nonJobs release. I hate to say it, but I think they took advantage of his death to promote a product. What we have is an innovative product, but no where near revolutionary. If Siri could handle more, maybe. If the battery life was extended..maybe(instead reduced significantly), if thinner, maybe. What we have is the same phone with a guessing issue to the upgrade. No one is impressed by it when I bring it out including myself. This is apple's Windows ME and I am returning tomorrow to wait for the real next revolution in phones.

I know it has an improved camera and a A5 processor, but it needs to be asked at what sacrifice. Sure, I could have an incredible 1080p recorder and 1 billion core processor that told god whats up, but it would only run for one second.

Lets face it, apple early released this. Siri can run on the 2g as it is all server bound. we are being forced to buy an overexpensive camera that can run games(however arent run well due to lack of controls on an iphone). It is obvious to me, and to most consumers. I am sad to think no one will really care now that jobs died.

With Jobs went the vision and direction. Impress me? 4S, this was your chance and you failed miserabily. The 4S reminds me of what I could think of and/or worse. Apple, you converted me for a minute.

Also, lets admit it...Siri can not do all that much. There are much more times that Siri fails than gets it right. Yes, Siri is beta, but it does not feel like a jobs product at all. It feels more like what apple used to produce when jobs was gone....rushed, incomplete (beta) versions of things we hope will get better but never do. I am never anti mac, but honestly let us check out battery life and see how we feel...apple fed us on this on. Yeah brah, you NEED that better camera, and man are HIGH DEF games fun on the huge iphone screen, so upgrade!!

As I said, it's just anecdotal!

I just downloaded this app called isystem tells you the processes ongoing on the phone whilst im typing this on my computer

in a matter of mins my iphone 4s went from 90% to 85%. i have wifi on, Radio off push notifications off except texts.

ID Name

0 Kernel_task

1 Launchd

12 UserEventAgent

13 notifyd

14 configd

15 Springboard

16 syslogd

17 CommCenter

22 lockdownd

28 locationd

29 wifid

31 ubd

45 mediaseverd

46 mediaremoted

47 mDNSresoinder

49 imagent

50 iapd

52 fseventsd

53 fairplayd.N94

59 apsd

60 aggregated

65 BTServer

66 aosnotifyd

72 networkd

79 MobilePhone ( Phone)

108 MobileMail (Mail)

150 creativeCar

158 Preferences

170 Appstore

179 iSysteminfoFree (it's open so its in the process list =) )

I hope someone can explain all these =p CHEERS!!!!

Well after 3 complete drains and full charges my 4S battery life is now excellent. This device is awesome and love it!! Everything is working perfectly for me now. This phone is a winner once you get the battery calibrated properly..

I SECOND THIS!! TURN OFF THE LOCATION SERVICES YOU DON'T NEED INCLUDING TIME ZONE STUFF THEN DO CHARGES AND DISCHARGES TO CALIBRATE. LEFT IT ON STANDBY OVERNIGHT AND LOST 4% :) BATTERY IS SO MUCH BETTER NOW!!