iOS 6.1 Battery Life

Here are the posted Apple specs for iPhone 5. I assume thats what device you are referring to

• Talk time: Up to 8 hours on 3G
• Standby time: Up to 225 hours
• Internet use: Up to 8 hours on 3G, up to 8 hours on LTE, up to 10 hours on Wi-Fi
• Video playback: Up to 10 hours
• Audio playback: Up to 40 hours

You can do some math and see where you stand.

stby/225= x% for standby

wifi usage/10 =y% for wifi

talk/8=z% for talk

then 100-(x+y+z)=% remaining that should be close to the battery meter

Someone back when determined that a good figure to use for y if you use wifi and cell data combined is the average so 10+8/2 =9. So use 9 as the factor if combined wifi and cellular data.

this is all a good estimate but not exact science. You need to keep track how you are using your phone and use those numbers. So if only using music and stdby 40 and 225. Hope this makes since. Again it will give you an estimate of where you stand based on Apples MAX specs. (note the "up to " statement in their specs)

zta1989 wrote:

I was wondering what the standard battery drain should be for the following conditions:

• Using the phone
• Browsing the web (for mostly text pages, such as articles with minimal graphics)

Thanks! I've only been using internet and phone since the restore and haven't used my wi-fi.

Question: When calculating the standby time, should I subtract the usage from that? When I looked at my usage after the restore last night, I noted that it seemed that the standby time includes usage. My stats were 1 hour 12 min of usage and 1 hour and 34 min of standby.

Assuming that I should subtract the usage from the standby, I have the following:

Standby:

16 hours 13 min less 2 hours 35 minutes of usage: 13.64 hours/225 hours = .06

Usage:

2 hours 35 min : 2.58 hours/8 hours = .32

WiFi: NONE

100- (6+32) = 62

current meter percentage: 82 (above standard when compared to calculation)

My standby seems to be stable in comparison to what I'm reading from others. My main issue seems to be when I'm online with my cellular connection. I'm wondering if some other posters may be on to something with the LTE/4G causing the drain.

I feel that sbailey4's answers and suggestions are accurate and very helpful. Step 3 is actually what helped me. I believe that if there was a "bug" as Don Louv

seems to think it is, that many more people, or all would be affected. I had no problems after updating any of our devices until I hit the iPhone 4S. The OTA upgrade would not even download. I tried resetting the phone but that did not work. Next, I tried iTunes and the upgrade downloaded over the wired connection and installed on the phone, with a few more steps than the other iPhones and iPads required. It did not erase the messages, email or photos. The phone is working just fine. We are getting great battery life on all of the devices, great wi-fi and cellular connectivity/reception. I didn't have to try step 4 or 5 because after step 3 the iPhone 4S was fine and is running smoothly. It does not suffer from any battery or wi-fi problems.

Here is an example for a 4s and the expected per hr usage breakdown:

• Talk time: Up to 8 hours on 3G, up to 14 hours on 2G (GSM) (100/8hrs=12.5% per hr)
• Standby time: Up to 200 hours (100/220=.5% per hr)
• Internet use: Up to 6 hours on 3G, up to 9 hours on Wi-Fi (100/6hr=16.65% per hr, 100/9hr=11.1% per hr)
• Video playback: Up to 10 hours (100/10hr=10% per hr)
• Audio playback: Up to 40 hours (100/40hr=2.5% per hr)

55%

Usage - 2hrs 32min

Standby - 1day 12h

per spec 36/200 -> 18% for standby , 2.5/7.5 for wifi/3g mix usage -> 33% usage, so spec says 18+33 would approx 51% should be used or you should have 49% remaining. (100-51=49) in this particular example. You get the idea. And if iPhone 5 you have to substitute those specs (like 225 instead of 200 for standby) Anyway hope this gives you an idea.

Yes, silly me. A bug is only a bug if 100% of the vast and disparate user community is affected. What was I thinking? I hereby resign from my career.

You say it's a but that Apple needs to fix. Many of us are not experiencing problems, so of course we don't think that it's a bug that Apple needs to fix. A users post helped me with the one of 6 devices that we had a problem with. That is just my experience. Good Luck with yours sincerely.

That was not done in the past but it may make it a little more close. Its only 1% difference in this situation 38 instead of 39. The standby time is total time since it was taken off the charger so yes you are correct it does includes usage. Unfortunately the battery meter is not linear (ie you may see 100% for 5 hrs then drop verses seeing 1 percent drop ever 3 hrs ) so not totally accurate but again this should get you close to seeing where you stand verses their published spec to get some idea. Probably if you take several samples it may be closer.

zta1989 wrote:

Thanks! I've only been using internet and phone since the restore and haven't used my wi-fi.

Question: When calculating the standby time, should I subtract the usage from that? When I looked at my usage after the restore last night, I noted that it seemed that the standby time includes usage. My stats were 1 hour 12 min of usage and 1 hour and 34 min of standby.

Assuming that I should subtract the usage from the standby, I have the following:

Standby:

16 hours 13 min less 2 hours 35 minutes of usage: 13.64 hours/225 hours = .06

Usage:

2 hours 35 min : 2.58 hours/8 hours = .32

WiFi: NONE

100- (6+32) = 62

current meter percentage: 82 (above standard when compared to calculation)

My standby seems to be stable in comparison to what I'm reading from others. My main issue seems to be when I'm online with my cellular connection. I'm wondering if some other posters may be on to something with the LTE/4G causing the drain.

Yeah the point that's being ignored here (over and over) is that there could be an issue with a particular update on a particular device. If that is addressed by resetting or redownloading and applying the firmware and it goes away then it would prove that the issue were caused by another entity and not necessarily by the actual operating system itself. If it were the OS itself then how would a reset fix it? Maybe Apple is secretly sending an updated version of iOS without the bug whenever you do the restore and thats why it fixes it. (not) More examples (again that have been ignored over and over) is the whole exchange bug issue that causes the email to hang up for whatever reason during the upgrade process from one firmware version to the next and runs the cpu constantly generating heat and battery drain. When the email account is removed, device rebooted and acct added back the problem goes away. BTW that has been a known issue WAY before iOS 6.1 and is exchange issue not necessarily iOS. There are countless reports of this resolving peoples battery drain issues (even in this thread) but still its ignored as a solution. Anyway I am glad some of this resolved any issues you were having with the one device that misbehaved during the update process!

blue5ft3 wrote:

You say it's a but that Apple needs to fix. Many of us are not experiencing problems, so of course we don't think that it's a bug that Apple needs to fix. A users post helped me with the one of 6 devices that we had a problem with. That is just my experience. Good Luck with yours sincerely.

Thanks. I thought it was the device not the OS when the problem showed up. For whatever reason the download basically hung up. Then it was all screwed up. I was happy to get it to a point where I could reset it! I think it it had downloaded it properly the first time as it did on the other 5 devices, I might not have had a problem. I set all 6 devices to upgrade at the same time and the 4S was the only one that had a glitch. I was happy to find some suggestions that worked!

iPhone 5 64gb, iOs 6.01, with moderate to heavy usage could get a full day and recharge over night, 15-25% battery left at end of day. Mild usage could get 2 days, 2nd night battery at 15-25%.

Upgraded to iOs 6.1, shut phone down, resynced for good measure, no changes to the settings, shut phone off and back on, charged over night, this early afternoon after very little usage phone is down to 40% already, typically would only be down to 80-90% at this time, 70% on heavy usage. Mid day when it hit 30% I put it back on the charger. This is the first time since I got my iPhone when it was released that I have had to re charge mid day especially after only mild usage. Even on my heaviest day of usage it would a full day, mild usage and battery is gone in half day?!?!

Does those steps help an Ipod Touch 4th generation too?

I would suspect so since its basically iphone with no cellular. Uses the same iOS. It certainly would be worth a try. The same scenarios would apply as far as corruption of settings or code duiring the update process. However I will say I have not participated in itouch forums so cant say for 100% as I have not followed those forums and results. But the typical response from Apple support for most issues on Apple iOS devices is to do a restore to refresh the software (iOS)

So by restore you mean, to plug it into computer,Itunes, and restore and delete everything off it?

Well sorta, it backs up your data first then restores the iOS then puts your data back. But the posts on page 3 is a different process. That is simply resetting the settings. Sometimes during an update corruption appears or settings or network settings etc from the old version are slightly different. Resetting puts them to the current iOS defaults and has helped many users get back to a working device. would recommend following that process 1st. If it doesnt help try restoring and finally performing whats called a DFU restore (you can search for that for the process) as a last resort if the other options dont help. Either way I would recommend you get a backup either in iCloud, iTunes or both before doing anything.

My Iphone 5 is not working as wonderfully previous to this 6.1 update. The battery is draining very fast using LTE and even Wifi or doing nothing by night with airplane mode. I also suspect that usage statistics doesn't work as before that it really showed my use. It is impossible that I have 17h 48 minutes of standby and 13h 30 minutes of usage in 19 hours!!! My battery is now at 1%. Previously to this update I was really at standby for more than 2 days... I want to recover my Iphone before this awful update!