iPhone 6S slow and low benchmark scores.

My 6s had the battery at 81% of its original capacity and had very low geekbench 3 scores (I use geekbench 3 cause it s faster). Below 30%, the clock speed would go to even 900 mhz. I changed the battery and now my 6s scores 4500 in multiscore with 5%.

I had sent a fairly comprehensive reply but it seems to have disappeared!

Anyway here is a summary:

1. Apple will not touch an iPhone that has a third party battery fitted.

2. If you want an Apple Store to replace the battery you had better make sure that your iPhone has a genuine Apple battery, so put your old battery back in before you visit the shop.

3. The only guaranteed way to get the CPU back up to speed (1400 MHz) is to have a genuine Apple battery fitted. You might get lucky with a third party unit, but it’s not worth the risk, now that you can get it done for £25.

Hope this helps.

DodgyTactics wrote:

I had sent a fairly comprehensive reply but it seems to have disappeared!

Anyway here is a summary:

1. Apple will not touch an iPhone that has a third party battery fitted.

2. If you want an Apple Store to replace the battery you had better make sure that your iPhone has a genuine Apple battery, so put your old battery back in before you visit the shop.

3. The only guaranteed way to get the CPU back up to speed (1400 MHz) is to have a genuine Apple battery fitted. You might get lucky with a third party unit, but it’s not worth the risk, now that you can get it done for £25.

Hope this helps.

I'm not sure why you're replying to me. I would never have had a third party replace my battery even if I did have this issue. I also pointed out, in the post you're replying to that opening the phone would most likely render the phone unserviceable by Apple. However, I would still suggest asking.

tried to connect another battery (AAA copy)

that's not helped, I opened cpu dasherX and there was 400hz ...

Hi, guys. I have the same problem on my 6S with samsung processor. Antutu shows near 50k... Sometimes animations get stuck and this is really annoying me. I've read this topic and see that problem must be in battery. But battery life is fine and I can use my phone all day without any problems. This must be rare problem and I don't know what to do now.

There is no point in battery replacing if problem will not go away. I've download CPU DasherX and thats what I see.

600 mhz.

I'm waiting for an answer, because the problem get me toxic toxic

laye65 wrote:

OK, I bought the battery from Amazon (where else would you get it from? :-) ) so does it mean that I got a poor quality battery?

Probably but there's no way to tell. As for where else you'd get a battery: Apple. However, now that you've opened your phone yourself, Apple may not consider you eligible for their battery replacement program. I'd still ask, though.

My post was intended to be a general observation to anyone who was thinking about fitting a non-Apple battery to their iPhone. This includes either replacing the battery yourself or by an independent repair shop.

In other words, the only 100% guaranteed way to get a result is to use an Apple Store.

Anperis wrote:

So, last chance, i am waiting for 10.3.3 and i hope they will solve this. Apple please, hear me...

Not here they won't. If you want Apple to know how you feel about something, use the feedback page:

http://www.apple.com/feedback

And for those people who will, almost inevitably say, "Yes, Apple IS reading here; they removed my post!!!!", the people who moderate these forums are not Apple engineers or developers. In fact, most of them work in a different state.

DodgyTactics wrote:

My post was intended to be a general observation

I believe the generally accepted etiquette would then be to reply to the original post.

Apologies - I’m new to this forum and not quite got to grips with way way it works.😊

DodgyTactics wrote:

Apologies - I’m new to this forum and not quite got to grips with way way it works.😊

And, quite honestly, the forum software leaves a bit to be desired. 😉

Sorry, I cannot help you, but my iPhone 6 (not 6S) has the exact same problem. I get about half the benchmark score as I did with iOS 10.1. There is no difference when I enable low power mode. Everything seems to run and start slower. I believe the problem is caused by Apple's battery "fix" that came in iOS 10.2.1.

How it works is that it somehow detects that I have a questionable battery, either via serial number or measurements. Then it throttles down the processor speed to avoid power spikes that would otherwise have caused drops in battery voltage. It is these voltage drops that can cause unexpected shutdowns.

So for me, iOS 10.2.1 works better in that there are less shutdowns, but I have to accept that everything now runs at about half the speed, compared to iOS 10.1. This has been confirmed via benchmarks, which now run at about 40-60% of the speed from November last year. The lower the battery, the slower the phone becomes. It can also be seen from how enabling power save mode, no longer changes the benchmark scores. The phone always runs in power saving mode (the processor speed part of power save mode). I am not sure how I feel about this solution.

What can be seen from the public benchmark database for Geekbench, is that there now seems to be two categories of iPhone 6: 1) those that run as before, 2) those that run at about half the speed. I think that those that run at half the speed are being down-throttled to prevent unexpected shutdowns. If anyone can explain these benchmark differences otherwise, please do so. I would have liked my phone to run as it used to when it was new, I can always charge it before it gets to 35% or so, when shutdowns start(ed) to occur. And yes, I have tried a clean iOS install as New Phone, and run all benchmarks with Background App Refresh off and in Airplane mode.

Indeed. I experienced the same problems on iPhone 6 on iOS 10.3.1 even 10.3.2 beta 2. It drove me nuts. But I believe you are right. It's logical and the shutdowns don't occur anymore. But it leaves me with a bitter feeling that the phone isn't at it's peak performance anymore.

Massive drops in Antutu and Geekbench. Always changing. Lowest was - 50% perf. drop.

Even on full charge or with power connected the performance won't go to 100%. Maybe 80% max.

And yes, it depends of the battery charge. Lower the battery - lower the scores.

My battery life is estimated to be at somewhere of 83%. Shutdowns we're present on 10.2.

I'm seeing the performance drop using the phone too. First I thought it was the OS. Now, I know.

I understand the idea. It's kind of an elegant solution to resolve the shutdown problem. But it bugs me.

Now my question is ... If I replace the battery, would the CPU continues to throttle like this or will it be normal again ?

I agree, I am really annoyed my iPhone is forced to run in this low power CPU mode. I (almost) always charge the phone before it gets to 30% where the shutdowns sometimes happened, and would have gladly had back its original performance. Sadly, the iPhone 6 is far long out of the limelight, and no one care what Apple does to it to avoid having to replace batteries en masse. If Apple had done this to a newer model, it would have caused quite the furore. As it is, it does not appear to affect all iPhone 6's still in circulation, and for those affected, only a very small minority notices the problem, and if anyone does, they write it off as "normal old cell phone, new OS slowness". I was surprised to see your reply to my post..

You raise a very good question - I have also considered paying for a battery replacement, but since I don't know if it will bring it back to original performance, I put it off for now.

Hi, same issue I had with my iPhone 6 (age 2yrs, iOS 6.2.1). Battery charging cyles 560+ out of 600 - as per Apple Store Support Tool.

Performance was half of the speed before and battery got drained withing few hours with sudden shutdowns.

They have replaced the battery and the performance issue vanished. Speed is back to normal.

Hope this information helps someone.

Bedt Regards,

Marcel