Ios 11.2.1 is really Bad .... It Drains my battery Alot

11.2.1 is the worst yet. I’ve had my 6+ for a couple of years and have Never had to charge it other than when I go to bed. The battery life is so bad now that I had to buy a car charger today. My phone spends more time charging than working. Apple really messed up on this one. It better be fixed soon or I’m buying a new phone and it won’t have an “I” in front of it.

Since doing the "upgrade:" to 11.2.1 two days ago, my phone battery drains so quickly I can't make it through the day. My usage has not changed at all in the past 2 days - only the iOS software has changed. I took my phone to my local Apple Store Genius Bar tonight. They changed a few settings such as brightness and the auto lock timing. They also installed 11.2.1 again. Nothing has made any improvement. Now I have a $700 phone that is 2 years old and almost useless. What do you suggest now?

Hello Hanshang99,
Thanks for reaching out to the Apple Support Communities. I understand you're having some trouble with your battery performance, and I have some information that may help.
Have a look at the article below for some helpful troubleshooting steps.
​Batteries - Maximizing Performance - Apple
If you run into any trouble, or if the symptoms persist, please reach out again.
​Best Regards.

I have a 6+ and most of us with 7s or below are having the same battery drain and also a lag time. You can search the net for hours and review after review recommends not downloading 11.2.1 if you don’t have an 8 and above. Forbes trashed the download and I only wished I had read the reviews first. Most believe it is because 8’s and X’s have a newer, faster and better processor. I’m not a techie but my battery is draining as I type. I scoured the web and have tried every solution I could find, spending hours to find a fix. There is none. 11.2.1 was not designed for the older phones. No, you don’t need a new battery. It’s a canned reply from people that aren’t suffering the problem. It’s a software glitch and all any of us can do is keep posting, email Apple customer service and make them aware of what they have done to their phones and customers.

I have found the same thing. Many searches, no answers except 'replace your battery'. I have discovered that if I go into the cold weather it dies at an extraordinary rate (10-15% per minute).

When I was running IOS 10 I had no problems at all, I did not need a battery replacement. I loved the phone. Now with IOS 11 I find it very aggravating every day. Leaving it unplugged at night, it loses 30% by morning.

I leave it on "low battery mode" 100% of the time, still dies within a few hours of use.

I'm not going to jump-ship, because I have a long history of success with Apple, but this is frustrating, very frustrating.

I did read a report that shows Apple is deliberately slowing down older phones "to save the battery life and prevent over-heating". Sounds like an effort to get me to ditch my expensive phone to buy another expensive phone.

I had a new battery installed today and I’m still experiencing the battery drain. I have no choice but to upgrade considering all of electronics (iMacs, laptops, iPods, phones, even Apple TV are all connected to my cloud. I even have the iTunes music plan. I feel like Apple is holding me hostage.

Don’t drink the kool aid. A new battery won’t solve your problem.

I had a new battery installed today and I’m still experiencing rapid drainage. I have no choice but to upgrade considering all of electronics (iMacs, laptops, iPods, phones, are all connected to my cloud. I even have the iTunes music plan. I feel like Apple is holding me hostage.

Don’t drink the kool aid. A new battery won’t solve your problem.

Nothing helpful there, Hans...care to try again?

I bought an iPhone for 2 reasons:

Clean interface

Long battery life

I've gotten used to cleaning the nonsense apps off of my screen after updates, but am now finding that my phone won't hold a charge all day. I've shut down everything that I can find, disabled location services and background updates to the few apps that I use, but nothing helps. I go to bed at 100% and wake up at 84%.

If you can't fix this, I'll be shopping different brands. No sense in paying iPhone cost if there is no iPhone quality.

Yeah, followed ALL of your suggestions and NOTHING has stopped the battery drain on 6+. 11.2.1 is the worst!

I totally agree. I upgraded to IOS 11 as a new phone not bringing over my backup... to start fresh. And now my iPhone won’t last past noon without a full charge. Apple please fix!