IPhone 6s dying with 30% battery remaining.

[gindygoo]

Okie dokie, here goes... my iPhone 6s has started to randomly switch off, as if out of battery (the little animation appears to prompt you to plug in the charger) whilst still having between 30/40% battery remaining. Plugging the phone in restarts it, and it'll show the same 30 odd % of battery remaining as before it shut down

. It's a real PITA as I'm having to carry a power bank with me in case my phone switches off whilst out.

I've googled this, read up on the Apple forums and it seems to be an ongoing issue with some iPhones. After going through diagnostics with Apple chat, and them looking at the software results they've said it's got to be a firmware issue.

I also followed a trouble shooting fix from the Apple community for this issue. It consists of fully charging and fully discharging the battery a few times, in the hope that it fixes the problem. It didn't make a difference in my case.

I'm booked into the Apple genius bar on Tuesday, so I'll update this thread with the outcome. I thought it might be helpful for other ppl finding themselves with this issue to document the process.

[viridis]

I did an online diagnostics the "genius" started.
Came back with "battery is showing as healthy so must be a problem your end"
So far this super praised apple support has been crap.

[MI5]

Sounds like you got one that CBA?
Surely the first question asked should have been about the phone's serial number?

[viridis]

They asked serial then said they needed to do diagnostics. So they started one through the ios system request on the phone. Once done they just said it's healthy and sent link to battery care page.

[viridis]

Alright, we've sent the diagnostic request, and you'll have about five minutes to initiate the process on your iOS device. To get the process started, navigate to Settings > Privacy > Diagnostics & Usage and tap "Start Diagnostics with Apple Support."

Please review the terms and conditions, then tap "Continue" and "Agree." If necessary, select your device and then tap "Start."

You'll see a progress bar while the diagnostic test runs. During that time, please keep your device powered on and avoid switching to other apps. After the test completes, you'll see the word "Waiting." From there, tap "Close" and "Close Diagnostics."

Let us know when the test is complete, and we'll review the results.

[viridis]

Once done...

Thank you for letting us know. We have had a chance to review the results and the battery is showing as healthy and no other issues were reported outside of the shutdowns you reported. Please take a look at the maximized battery performance page here: https://t.co/GnGx08Sr3H for tips and tricks to maximizing the battery performance. You can also look under Settings > Battery and see what has used the most of the battery in the last 24 hours and 7 days.

Bear in mind they didn't dispute the "ones I reported"