The iPhone 6 Review
by Joshua Ho, Brandon Chester, Chris Heinonen & Ryan Smith on September 30, 2014 8:01 AM EST- Posted in
- Smartphones
- Apple
- Mobile
- iPhone 6
Battery Life
Battery life is undoubtedly one of the most important aspects of any smartphone. However, battery life is an enormous subject, and while it may seem simple on the surface there’s a great deal of underlying complexity. In order to try and cover the full breadth of use cases, we start with our baseline test, which is now the web browsing battery life test. In order to try and control for extraneous variables and get a good relative comparison, we standardize all displays to 200 nits on a full white display.
Our first test is in WiFi web browsing. As we can see, the iPhone 6 puts up a surprising showing for a phone with such a small battery. If anything, it seems that Apple leaned towards the conservative side in their advertised numbers as we managed to get higher than expected battery life. It may seem strange that the iPhone 6 achieves such a strong showing despite the small battery, but this is because the test is designed to avoid penalizing a phone for having a faster SoC or data connection.
In LTE web browsing, we see the same story. The iPhone 6 is about equal to or better than the competition, which is in line with what we would expect given the cellular architecture. In the case of the iPhone 6 and most other flagship smartphones this year, components such as Qualcomm’s QFE1100 envelope tracker, WTR1625 transceiver, and MDM9x25 modem have managed to make LTE power consumption approximately equal to WiFi power consumption. With the deployment of category 6 LTE and next generation RF components we could see LTE battery life exceed WiFi battery life.
While the web browsing test gives us a good picture of battery life in display-bound tasks, intensive use tends to be more SoC-bound. In order to see how phones compare in SoC-bound workloads, we turn to GFXBench, which has an infinite looping test. This test also provides a good idea of nominal performance. Unfortunately, for now we cannot report an accurate Basemark OS II battery life score as the test will stop when low battery notifications pop up on the screen. We are currently investigating methods to bypass this issue and report a final score in the near future.
In the GFXBench test, at first it seems that the iPhone 6 is one of the worst for battery life under sustained load. However, once we look at the performance degradation over time it makes a lot more sense. This seems to be the type of workload that Apple referenced in their presentations, because this is the first phone I’ve seen that successfully does a full rundown without actually throttling. Of course, this does come with high skin temperatures. The phone definitely gets hot, but not uncomfortable. Using a FLIR camera, I saw peak temperatures of around 43 degrees Celcius, so it definitely doesn't exceed 50C in most conditions.
Normally, I would expect a 4.7” class smartphone to need a battery around the size of the HTC One (M7) or Motorola Moto X (2013) to keep pace with phones like the One (M8) and Galaxy S5, but Apple has pulled it off with a battery that is much smaller. There are two key factors that we can point to in this case. The first is the display, which can avoid pushing the LED backlight towards the higher current region that is much less efficient. This is because the amount of light-blocking circuitry is reduced and the active area of the display can be higher. The second aspect is the SoC, which is on a lower power 20nm process node. While TSMC’s 20nm process doesn’t have FinFET, improved silicon straining and high K metal gate make it possible to drive down active power and leakage when compared to 28nm processes. It’s also likely that the A8’s architecture is more efficient than other SoCs we’ve seen this year. However, it's important to note that without a capacitance and voltage table or something similarly concrete we can't really prove this statement.
Charge Time
While battery life determines the time spent away from a charger, the time spent attached to a charger is just as important. Even if most people charge their phones at night, there are plenty of cases where people don't have at least five hours to spend charging their phone. For example, forgetting to plug the phone into a charger before going to sleep or charging a phone between connecting flights are all times when charge time becomes crucial. In order to properly test for charge time, charge time is measured as the time from when the phone is connected to the charger to the time when the A/C adapter reaches its lowest power state with the phone still connected.
As you can see, the iPhone 6 performs reasonably well, and ends up in the same range as the iPhone 5s. The iPhone 6 Plus ends up on the high side because it ships with the same power adapter as the iPhone 6, which can provide a maximum of one amp at five volts.
Fortunately, based on the USB device information for the phones, both the iPhone 6 and 6 Plus support charging with power adapters like the iPad charging block that can provide up to 2.1 amps at five volts. Using one of these chargers will dramatically reduce charge time on the new iPhones, and it's a very worthwhile investment (assuming you don't already have an iPad) for the iPhone 6 Plus in particular.
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Samus - Tuesday, September 30, 2014 - link
Too many people define "good LCD" as having high resolution. In the real world, that just isn't true. There are so many terrible 1920x1080 panels on the market, and I'm not just talking mobile devices.Look at desktop LCD's. To get one properly calibrated you need to spend $500+ for a 24" HP Dreamcolor or NEC Multisync PA Spectraview. Some Dell's with Samsung LCD's are pretty good out of the box but almost nothing is 100% RGB until expensive calibration.
So back to Apple. They're all about balance. They don't push the envelope in any direction like Samsung (and others.) What bothers me lately about Apple is they are "too" safe with their design language and technology that their products are actually becoming boring. As the company that pioneered mainstream unibody mobile devices and multitouch\gesture driven interfaces, it's interesting the competition has essentially been perfecting it for them to just copy back.
At least Apple isn't suing everybody anymore...seems like Steve's thermonuclear crusade is finally dying along with him.
Omega215D - Tuesday, September 30, 2014 - link
I do have a problem with people constantly trying to push AMOLED as the ultimate display tech due it being featured on DisplayMate with the Galaxy S5. People forget that you lose the efficiency of OLED once you start using something that displays a lot of white like web browsing. Also, turning down the brightness still has the tendency to give it a "soggy" look to it, though it is much less on the Galaxy S5.The burn in effect can be easily avoided unless the clock/ dock locks up for whatever reason and leaves the display static.
darkich - Tuesday, September 30, 2014 - link
The burn in can be easily prevented also.Download an utterly simple burn in tool app, and leave it working for couple of hours, every few weeks or so.
nevertell - Wednesday, October 1, 2014 - link
This is exactly the kind of thing that people DO NOT WANT TO DO.It's a phone, it must just work, I shouldn't worry about any specific technical part of the phone, let alone do maintenance work on it to keep it functional.
elajt_1 - Friday, October 3, 2014 - link
Nah, thats for bad image retention. If you already got a burn-in you can't do anything about that as of now.Toss3 - Wednesday, October 8, 2014 - link
In my experience AMOLED displays look a lot better than their LCD counterparts with the brightness turned down. They also give you the option of having even lower screen brightness which is ideal if you want to use it in bed at night (night mode on android looks great on the S4, but not so much on my Nexus 5).hoelee - Thursday, December 4, 2014 - link
IPhone white balance not accurate, how you proven your point said iPhone had good display? At least I saw on mine eye compare between mine z3 with the so call iPhone... Besides, you calculate by yourself, iPhone 6 latest phone less 1x pixels to push compare to android FHD screen. Benchmark alway unfair in mine point of view...braveit - Friday, December 12, 2014 - link
Apple hasn't really done much on it's new iPhone 6 release. Source: http://berichinfo.com/reasons-iphone-6-sucks/Caliko - Tuesday, October 6, 2015 - link
Who else is innovating in design?All phones today are iKnockoffs.
Steve's thermonuclear attack has juat started buddy!! Droid is making manufacture lose billions. Can't wait to see who goes bankrupt first!!
akdj - Thursday, October 2, 2014 - link
The 'little SD expansion slot' that reads and writes at about 6-8Mb/second vs, the onboard NAND speed tested within the review should be enough to tell you why samsung and ....hmmm ....are offering the micro SD slot. Android is moving 'away' from accessibility to and from the 'off board' storage. I've got a Note 3 and with each update I've been able to do less and lessApparently you didn't bother to read the review ...at all. You also mention 'good LCD ...at least as good as the competitors.'
Then you quite DisplayMate. The S5. And the single point difference between it and it's LCD runner up. From Apple. If you'd have bothered to have read this review ...or the S5 review on Anand's site when it dropped you'd know A) how impressed the author was with the evolution of AMOLED, it's continued refinement and accuracy, brightness and viewing angles. B) you'd notice in EVERY possible measurement. Each one in the review are 'objective measurements'. It (6) tops the display's characteristics in each area someone that knows what a 'great display' entails. At 400+ PPI, you nor any of your freneds will distinguish the difference between it and the new Note 4 or any other 2540 display. It's silly, it's a waste of energy and its detrimental to fluency of the UI (with today's SoC GPU and that many pixels) and the ever important 'battery life'
To be fair, NO OTHER vendor offers 128GB, & 64 is extremely rare. I waited six weeks for a Note 3 w/64GB to show up at AT&T. Never happened and I settled for 32. At the same price as the 64GB iPhone 6.
And from what I've read the 2014 model will have the same. 32GB with a caveat. Buy a micro SD card. Hope Google allows support in the future and keep your fingers crossed. 1080p on my Note chews up space. 4K is quadruple. And it will NOT shoot to the fastest SD or microSD card on the market.
As an ambidextrous owner and user since their inception, I enjoy both Android and iOS. But silly comments like yours shows your ignorance. It was IN THE review! The actual (& damn near identical testing method used by DisplayMate's team will use) 'proof' it's 'LCD ....(IS) @ least as good as its competitors.