iPhone goes into throttling mode at 88% health

[chewbaka]

My iPhone 6s, with an only 18 month old battery, had a battery related shutdown and has now gone into peak performance management mode. The battery is at 88% health, but has had horrible life since about January and has dropped from about 95% health in that time. Battery life has been particularly atrocious the last couple weeks, but it recharges rapidly.

1: is it normal for a battery at 88% health to have a shutdown and enter throttle mode?
2: is this rapid battery health degradation normal or might it be usable as leverage for an out of warranty replacement from Apple? My original battery was still at about 85% after nearly 3 years!
3: could it be something beyond the battery? I’d hate to sink $80 into a battery if something else is causing the problem, and but I’d rather wait to get a 5G phone or preferably have a potential new employer pay for a new phone at the end of the year...

 

[Tritto]

My SE is at 87% battery health and I'm charging it twice a day. It is performance limited because it's experienced an unexpected shutdown or three (I know, I can turn off the performance limiting if I want). There are one or two apps that I use that absolutely savage my battery, and those are the ones that have caused the unexpected shutdowns. One is a forum app (Tapatalk) and the other is an online market place (gumtree). The thing each has in common is they both have lots of advertising. As soon as I paid the VIP premium for Tapatalk and got rid of the advertising it stopped killing my battery.
Either way, my 87% battery is now f%#ked.

 

[BugeyeSTI]

If Apple replaced the battery already, it's warranty is 90 days so I highly doubt you'll have much luck getting them to replace it for free. You can either pay Apple to replace it again or you can purchase a battery from a 3rd party like ifixit for $30 and do it yourself..

 

[mnsportsgeek]

1. I'd say no. 88% is still a healthy battery. That said, it may still be normal to be in throttling mode per Apple's code. I would say you could safely turn off throttling mode with 88% health though and have minimal issues.
2. 88% after 18 months sounds normal to me. The 6S had poor battery life to begin with, so I would expect a heavy user to be putting a lot of cycles on the battery. I don't think this is accelerated aging.
3. The battery is likely the issue, but you could try a restore as new if you're in for some troubleshooting. You could also look at your battery settings and see if there is an app that has been killing your battery. This would be more for your knowledge for the future though as the damage would have already been done.

 

[one more]

18 months can easily cook the battery, depending on your usage pattern.

Apple battery stats, from my experience with iPhone 7, are highly inaccurate. I had it showing the same 88% battery health, at the same time displaying a message to replace the battery. If you have a Mac, install a tiny app called CoconutBattery and you should get a much better picture. In my case, my battery’s capacity actually dropped down to 55% (nearly half), so nowhere near Apple’s reported 88%! Good luck! 🖐

coconutBattery 4 - by coconut-flavour.com

With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS devices (iPhone, iPad)

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