IOS 9.0.2 - Poor battery life on iPhone 6

You may want to update your phone to the latest version which is 9.1

Please make sure you backup the phone to iTunes before you start the update using How to back up your devices using iCloud or iTunes - Apple Support

I updated to 9.1 yesterday (11/2/15). Didn't have a problem with battery life until last night. Overnight while I was sleeping (8 hours) and while phone was also "sleeping" but still on, my battery life went from 74% to 14% this morning. Tried to contact Apple. I know this has something to do with the new download, as this has not happened in the past. So now what?

I'm experiencing the same. The same night I upgraded to iOS 9.1, I could watch the battery drain at an insane rate; Something like 15%+ per hour. The phone is completely dead within 8 hours from a full charge. I was on iOS 9.0.x (I don't remember which), and was not having any problems, my iPhone 6 Plus would last me 1.5 to 2 Full Days of moderate use, which was reasonable. This is complete unacceptable, but from past experience Apple Support is laughable at best. Many others are reporting the same experience since the "upgrade": Iphone 5s fast battery drain with ios 9.1; Unfortunately we will continue to get the "Restart the device", or "Shut down every app" or "Don't use bluetooth" nonsense for a few weeks until someone realizes there really is an issue and properly debugs it.

Battery drain since early October. The fact that Apple won't fix what they broke with an update is just lazy.

Iphone power loss bleed

I have the same problems since i upgraded to ios 9.1. my friends told me may be I have updated the Facebook apps, that will drain the battery usage.

I have so frustrated that even I charged my phone, the battery increase only little bit. If I use my car usb charger some time it will reduce the battery percentage even charging.

Please help.

Ivy

Hi, im having the exact same issue youre describing, have u found any real solution? I have called Apple Support three times and they are not able to help me...

I have the same experience! I updated to 9.0 with no problems--even experienced improved battery life. With 9.1 my battery dies on standby and I have to recharge several times a day. I've spoken with 7 different Apple support people and been to the Genius Bar 3 times this week and it still isn't fixed. If anyone finds the solution, please share. This is intolerable and not the excellence I've come to experience and expect from Apple products.

I had the same problem with my brand new 6s running 9.1. I did a complete reset on my phone and didn't restore it but set it up as a new iPhone. (Big pain, I know) . Since then battery life has been perfect.

I am considering that, just don't want to. I use to tout apples battery life, no more. Ive reset the phone and it works for a little while. But what works best is turning off cellular data. I hate that even more because why have an "I" phone if you dont use the I. Didn't use my phone at all yesterday, it was in sleep mode in my purse. Whipped it out a few moments ago its completly dead. Guest who forgot to switch off Cellular Data....this girl. Apple needs to find and fix the issue, or roll our updates back to the one that worked:(

It is definitely a glitch with the setup of iOS 9--mine occurred when I wirelessly updated to 9.1. I had no battery issues with the 9.0 update, but the day I took the 9.1 my battery died quickly. I recharged and it died overnight. I didn't change my use of the phone, but even on standby, it would die in about 5 hours. My phone is 13 months from new and I don't have AppleCare. I called support twice and they did usual troubleshooting, including a phone reset, but no improvement in battery life. Since Saturday I've gone to the Genius Bar 4 times. One Genius Bar guy tried to tell me that although my battery life was at 95% I should expect a decrease in time the battery stays charged and plan to stay plugged in or buy a charging case. I couldn't accept that it was a battery or age problem because it was a night/day difference from when I took the update, so I kept going back. Yesterday, on my 4th visit in 6 days, I got a new phone. It is definitely a glitch, not a battery life problem. My advice is to keep talking to support patiently until you get satisfaction.

Any of you with battery problems using Wi-Fi Calling? That turned out to be my issue. See this post that includes a video showing how turning on/off Wi-Fi calling killed my CPU and therefore my battery:

Yes! I downloaded the latest software and updated both my iPad and iPhone 6S and it is a disaster. I have used every idea to save battery life such as turning off app refresh, brightening, etc., to no avail. The phone bleeds battery life like there's no tomorrow. It is ridiculous. There has to be something to fix this. My phone was able to last double the amount of time that it does now and the same with my iPad. All I'm ever doing is recharging both of them because they drain after you use them for like an hour. Nothing changed except the fact that I downloaded the latest software, I guess 9.1. The phone went from fine and the iPad to bleeding battery life the next day. It's obvious it's the software.

Yes! This is exactly what happened to me. wirelessly downloaded 9.1 on iPad and iPhone and all it does is die after a couple hours. Just happened a few days ago and overnight my phone and iPad are joke to be able to try to use.

Do you have Wi-Fi calling turned on? Are you on AT&T?

Heres a link to a video that I shot showing the impact of WiFi Calling on my phone. You can see that the act of triggering WiFi Calling pegs the CPU at 50% and in the minute that the feature is active, the battery drops 2% from 89% to 87%. There is another thread that deals with carrier settings, but it's for a European carrier and this is happening to me on AT&T.

I turned Wi-Fi calling off and battery life is back to normal now.