iPhone 6 shut off unexpected

I have tried all of the fixes. I have calibrated the battery. I have deleted apps. I have restored it completely. This started just after I upgraded to 10.2. Prior to this, I would get at least a day and a half without charging. My phone shuts down anytime the battery gets to between 40% and 30%. No warning, just black screen. I plug it in and it shows no battery at all. I rely on my phone to do my work. This is totally unacceptable! Please, Apple, help!

iOS 10.2 iPhone 6

Firmware 5.32.00

I'm having the same problem with an iPhone 6, gets to anywhere in between 20% and 30% battery life and any number of functions makes it shut down completely and after plugging in for 30 seconds then shows 25% or more battery life. And the battery life in general has degraded significantly since the last upgrade, to the point the phone will not even last 8 hours with very light use. Apple, are you there? Seems like they are replacing 6s batteries that have the same problem but unfortunately I had to buy a 6 (work change) about 2 weeks before the 6s came out. Seems like a phone that is 1 year and 3 months old shouldn't be failing like this without any offer of support.

Same issye, tried everything(reset deleted all apps) and removed sim, then also restarting again and again.

before 10.2.1 ios it was working like a charm but now returning to previous ios version is also not working.

it *****

If your iOS device restarts or displays the Apple logo unexpectedly - Apple Support

You may need to calibrate your iPhone's battery.

Use your iPhone until it's completely dead then charge it to 100% (do not use your iPhone while its charging). The hold the home button and power button. Your phone will appear off however you must keep holding the buttons down until you see an Apple logo appear.

It is recommended that you do a full charge cycle each week. You should use the iPhone until its battery indicator shows that the battery charge level is below 20%, then charge the iPhone fully (do not use your iPhone while its charging.

Did this and still have the same problem. My phone will say I have anywhere from 20-37% battery life left, If I go to use Siri the phone will shut off and not turn back on until I plug it into a power source. It will then take 5-10 minutes for the white apple screen to appear and the battery life will then say 50%. If I try again to use Siri the same thing happens.

this is BS

Have this problem, particularly when I use the camera. Has happened a number of times and latest time with over 60% battery remaining. I often run the battery down to less than 20% so I don't think it's a battery use issue. I've noticed lately since this has been happening my battery seems to drain quicker over the day than it used to and checking battery use there is no unexpected (or new) app using much battery.

I have the same questions, and its gutting worse

I should note in this thread that I was running 10.0.1 beta but have now returned to 10.1.1 normal release. If I see the problem again I will post again, to verify it wasn't an issue running the beta release.

Did you ever find a solution to this issue? My phone does exactly as yours and I cannot figure out how to fix it.

Well since I got off the beta track and installed 10.1.1, I haven't seen the issue. I _have_ still noticed much reduced battery life, so I wonder if it's an issue with faulty batteries and the OS getting a signal that the battery is more dead than it actually is...

I'd do a full backup, a full device reset, and restore the backup if you haven't already. Otherwise, head into an Apple Store with a low battery and try to show them it happening. That was my plan if it continued, but haven't seen it happen again since getting off the beta.

My iPhone 6s had the same problem since I purchased it two years ago. Unexpected shutdown's and Inaccurate battery life indicator's.

It's very frustrating when you plug in your iPhone after it shutsdito recharge it and it tells you you have 30 or 40% remaining.

I have this problem with the iPhone 5c since the iOS 10.2. I was surfing the net using Safari. The battery was at 44% and it just turnes off. Then I saw the plug symbol indicating it was dead. I plugged it in for 1 sec and then it was back to 40%. Anyone else with this?

I have the same problem. I'm so frustrated I'm not sure what to do. I have tried all the fixes.