iPhone 6 Geekbench scores still drop after brand new battery

GaryR's Avatar

GaryR

30 Dec, 2017 08:12 PM

I have a brand new, Apple-branded battery in my iPhone 6 64GB (NOT 6S), and I'm on iOS 11.2.1.

I have done several Geekbench CPU tests and I'd like to share results and get a response from Primate Labs, who can hopefully get these results out to social media and/or Apple.

My tests seem pretty conclusive at this point (at least with my phone/battery), that iOS throttling starts occurring somewhere below 90% battery-life. EVEN WITH A BRAND NEW BATTERY. Below are the CPU scores at several different battery-life levels. I set the 100% and 92% levels to zero as anything between 90-100% shows no significant slowdown. This is essentially my baseline. This shows (at least for my experience) a 20% drop somewhere below about 90%, and then levels-off until below 50% and then another dramatic 20% drop occurs.

I'd been really interested to know if any others have similar CPU scores after replacing their battery.

At this point my conclusion is, if I want to ensure top performance, even with a new battery, I will need to stay above 90% charge.

Battery % Single-Core CPU Score Multi-Core CPU Score % Single-Core CPU loss % Multi-Core CPU loss
100 1337 2285 0.0 0.0
92 1332 2293 0.0 0.0
88 1063 1789 20.5 21.7
77 1064 1804 20.4 21.1
60 1071 1800 19.9 21.2
56 1066 1802 20.3 21.1
52 1068 1795 20.1 21.4
48 830 1392 37.9 39.1
42 834 1385 37.6 39.4

  1. 1 Posted by GaryR on 30 Dec, 2017 08:21 PM

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    Re-sending table (hopefully formatted better):

    Battery % Single Score Multi Score % Single CPU loss % Multi CPU loss
    100 1337 2285 0.0 0.0
    92 1332 2293 0.0 0.0
    88 1063 1789 20.5 21.7
    77 1064 1804 20.4 21.1
    60 1071 1800 19.9 21.2
    56 1066 1802 20.3 21.1
    52 1068 1795 20.1 21.4
    48 830 1392 37.9 39.1
    42 834 1385 37.6 39.4

  2. Support Staff 2 Posted by John on 31 Dec, 2017 09:17 PM

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    That's interesting. I'm not sure what's going on here. How many times have you rebooted your phone after you got the new battery? Is the battery from Apple or from a third-party?

  3. 3 Posted by Luke on 01 Jan, 2018 12:38 AM

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    also, did you clear/flush the RAM before each test at each battery % level?

  4. 4 Posted by Gary Roberts on 01 Jan, 2018 07:08 AM

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    I just closed all open apps before each test.

    More importantly, I was so hung up on looking at Geekbench scores, I don’t believe I see any real perceptible performance degradation when battery level (and Geekbench scores) go down? I am doing the same things on the phone while at 100%, and all the way down to 38%, and don’t really notice a difference. So it seems like Geekbench scores are not really “believable” at this point. Can you folks shed some light on why this may be happening???

    Thank you

  5. 5 Posted by Gary Roberts on 01 Jan, 2018 07:13 AM

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    I did a reboot and ran a test. Battery was at 68% and single-core was 1004, so that’s consistent with all my other tests. Battery was replaced at a repair shop where they verbally said they were Apple-branded. But I would have to crack it open to verify.

    More importantly, I was so hung up on looking at Geekbench scores, I don’t believe I see any real perceptible performance degradation when battery level (and Geekbench scores) go down? I am doing the same things on the phone while at 100%, and all the way down to 38%, and don’t really notice a difference. So it seems like Geekbench scores are not really “believable” at this point. Can you folks shed some light on why this may be happening???

    Thank you

  6. 6 Posted by rowan on 01 Jan, 2018 11:31 AM

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    I too have a plain old 6. And it’s battery capacity is 85% as measured by coconutBattery. Using CPU DasherX app, I get a max speed of 1127MHz, dropping to 949, 839 and as low as 600 as my battery dishcharges.

    However I am very curious to know what metric iOS/Apple use to throttle the cpu? Because there seems to be no definite points (battery %) at which the throttling starts. I’ve had my battery at 2%, and still running at 1127MHz.

    I’m not entirely sure what the Geekbench scores mean yet...I’ve only just downloaded it and still working it out....I will say however that the “comparison results” vary between the 3 devices I’ve tested so far. Not the numbers, just what is shown in the list of devices....e.g on my SE there was a list of almost all iOS devices, on the 6 it showed a 5s and a bunch of android devices.

    FYI my cpu single score is 1279, and multi is 1799. Compute score of 4197. No idea what my battery % was at the time as I can’t see that anywhere in the results (feature request for app update?)

    Also, where do you get your “loss” readings from?

  7. 7 Posted by Gary Roberts on 01 Jan, 2018 06:51 PM

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    I think I’m about ready to abandon this testing project.

    I was so hung up on looking at Geekbench scores, I don’t believe I see any real perceptible performance degradation when battery level (and Geekbench scores) go down. I am doing the same things on the phone while at 100%, and all the way down to 38%, and don’t really notice a difference. So it seems like Geekbench scores are not really matching what I should be experiencing, performance-wise.

    With my old, original 3-year old battery, single-core scores were in the 800’s and performance was terrible. Now with new battery, scores can be in the 800’s but no longer equal poor performance. So, this seems like something wrong with the testing tool. Or I’m just doing something wrong???

    I may try to load Coconutbattery on a Mac and check those results.

    The “loss” values are just the percentage difference between highest score and score at that battery charge level.

  8. 8 Posted by Sachin on 04 Jan, 2018 08:30 PM

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    Did you see any performance improvement on iphone6 after replacing the battery ?

  9. 9 Posted by Luke Taylor on 04 Jan, 2018 08:40 PM

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    Huge. CPU score at 32% battery charge before was at 1384 multi and 837 single. After battery replacement also at 32% charge, #’s were 2703 and 1568 respectively – a 2x improvement. All else was equal – same ios level, RAM cleared, all apps closed, and all 3 radios on. Battery score using Battery Life app (not geekbench) went from 39% across all charge ranges, to 100% across all charge ranges.

    Def get your battery changed.

    Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

    ________________________________

  10. 10 Posted by GaryR on 06 Jan, 2018 07:00 PM

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    I loaded CoconutBattery. Battery shows Full Charge Capacity is 1809 mAh and Design Capacity is 1810 mAh, so...believing this...I think my new battery is good. I re-ran several tests at different battery levels, this time clearing RAM between each test. No difference. Same scores.
    Luke Taylor: Not sure how your iPhone 6 Single-Core score can be over 200 points higher than mine??
    I tried shutting off Background App Refresh and tested again. Absolutely no difference.

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