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Well... today, coconutBattery says that the batteries design capacity is at 88.5%

How long have you had your device? 88.5% is a respectable number. Also when deciding to get a new battery, remember that a new battery is not necessarily going to last longer than the one you have. It most likely will be better in every way, but it's not out of the question that a new battery you get could develop a defect and die on you whereas the older one might have continued to decline, but stay alive.

This has happened to me before. It's not common, but batteries are unpredictable. I've had one battery in a 2009 MBP last 6 years of heavy use before becoming feeble. I've also had brand new replacement batteries blow out on me after less than 2 years of minimal use. You just never know.

I'm not trying to scare you away from replacing a battery, but just letting you know one reason why you might not want to freak out if your battery is no longer close to 100%. Change it when it's time, but don't change it before its time is up so long the battery is perfectly fine, but just slightly degraded.
 
$29 for replacement! That the cost of the battery retail and labor is free! Cannot beat this price!

I was actually surprised to learn that the regular price was only $59. I enjoy servicing my own electronics so I'd likely opt for doing it myself with a $29 DIY kit if I need a new battery when the replacement promotion ends after 2018, but I don't consider $59 to have it done for me by an authorized tech to be expensive. I thought it'd be more.
 
You need to update.

Not that i'm aware of. Just update to ios 12 and be happy. Or just get your battery replaced. It's cheap. Those are your options.

id update to ios12. its faster than other software even on older devices.

I disagree with updating, at least without thinking about the ramifications.

The OP is on iOS9. Once he upgrades, he can never go back. If he has some important apps that haven't updated to 64-bit, then he'll never be able to use that app again. It would suck for the OP to lose an app/data just to update for the sake of updating.

Also, iOS9 on an iPhone 6 is blazing fast. While iOS12 is faster than iOS11, I wonder if anyone would be happy going from a blazing fast iPhone6 to whatever the iPhone6 feels like on iOS12. Can't imagine it would be anywhere near the speed as iOS9.

Lastly, to the OP. I wouldn't worry about getting a new battery at this point. If Coconut Battery's reading is accurate, you're fine. If you haven't experienced any random shutdowns, you don't really need the new battery.

However, if you do decide to take advantage of the discounted battery pricing at Apple, make sure you tell them not to update iOS, if you don't want to. They may tell you that for them to run their diagnostic, they have to update ... at which point you'll have a decision to make.

Also, there are trade-offs by not updating. Running iOS9, you run the risk of security issues that have not been patched. Only you can decide if that's worth it to update. If you're ever in the US, an iPhone on iOS9 will be pretty easy for the CIA/NSA/FBI to break into. Heck, it might be easy for hackers to break into as well if they get a hold of it physically. But what are the odds?

ft
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I was actually surprised to learn that the regular price was only $59. I enjoy servicing my own electronics so I'd likely opt for doing it myself with a $29 DIY kit if I need a new battery when the replacement promotion ends after 2018, but I don't consider $59 to have it done for me by an authorized tech to be expensive. I thought it'd be more.
The only problem with the DIY kits are that the quality of the batteries are hit/miss. I've gotten good ones for an iPhone5 from ifixit. I've gotten a good Yontex for another iPhone5. The Yontex for my iPhone6 was good for about 3 months, but it's garbage now. Thank goodness I saved my OEM battery, which I'll put back in at some point because it's better than the Yontex.
 
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So this battery lasting performance is not the issue that Apple resolves with the battery replacement... correct? Im experiencing battery degrade, not iPhone performance... maybe replacing the battery will solve the battery degrade issue only until the aging reaches the 2 year time that the battery is in now... do you understand what im talking about? :(

uh yeah if you have a 2 year battery its not going to have 100% max capacity so replacing that battery with one that does have 100% max you are going to have better battery performance
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I was actually surprised to learn that the regular price was only $59. I enjoy servicing my own electronics so I'd likely opt for doing it myself with a $29 DIY kit if I need a new battery when the replacement promotion ends after 2018, but I don't consider $59 to have it done for me by an authorized tech to be expensive. I thought it'd be more.

if you're cool with having to do all of your repairs yourself from now on, go for it. because Apple won't even swap a phone with a 3rd party battery.
 
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if you're cool with having to do all of your repairs yourself from now on, go for it. because Apple won't even swap a phone with a 3rd party battery.

Good point. I guess I'll let Apple take care of it unless it's a couple more years from now and I'm not that worried about making my iPhone 7 exempt from getting service.
 
Has anyone done the $29 battery replacement with Apple?

Do they force an iOS update when replacing your battery?

I have 10.3.3 on my 6S Plus and want to keep it that way.
 
Has anyone done the $29 battery replacement with Apple?

Do they force an iOS update when replacing your battery?

I have 10.3.3 on my 6S Plus and want to keep it that way.
Not sure, but I think they insist that the diagnostic be done prior to swapping the battery. I had a Genius tell me that the iPhone needs to be on the latest system for the diagnostic to work, but I don't believe that.

The cynic in me feels that it's a sneaky way to get everyone on the latest OS.

If I were you, I'd make sure you tell the genius several times that you do not want them to update the OS under any circumstances. They may decline to swap the battery, but then you'll have a decision to make. If they ask why you don't want to update, you can say that you have apps that won't work on 64-bit.
 
They may decline to swap the battery, but then you'll have a decision to make. If they ask why you don't want to update, you can say that you have apps that won't work on 64-bit.
And then i guess they'll surely ask "what apps do you have that wont work on 64bit?"
 
Has anyone done the $29 battery replacement with Apple?

Do they force an iOS update when replacing your battery?

I have 10.3.3 on my 6S Plus and want to keep it that way.
I just had my iPhone 6s Plus battery replaced at the Apple store, and it's still running iOS 10 as I left it. Was not asked to update, and the diagnostic seemed to work just fine on 10.
 
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And then i guess they'll surely ask "what apps do you have that wont work on 64bit?"
It would really be none of their business, but if you choose to provide an answer, Google could probably tell you a few apps that haven't updated to 64-bit.

Alternatively, you could just tell them that you like the phone on iOS 9 and don't want to update.

Anyway in one of your other posts, you mentioned that you updated to iOS 11 already so it's moot point.
 
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I just had my iPhone 6s Plus battery replaced at the Apple store, and it's still running iOS 10 as I left it. Was not asked to update, and the diagnostic seemed to work just fine on 10.
Thanks for sharing, I am going to backup my 6S Plus and schedule a battery replacement. How long does it take to get it done?

I discovered that I can update my apps on iOS 10.3.3, and most run fine. A few will quit unexpectedly but relaunching they'll works.
 
Where have I said that? I'm still on iOS9
In this post.

10BE3FAA-F084-4437-B4A1-F69F9BBFFC7B.png
 
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