Apple iPhone 8 goes through our battery life test: encouraging result

Our Apple iPhone 8 review is out and in it you can find our detailed impressions with the new iPhone, but one thing we want to highlight here is the iPhone 8 battery life.

After all, we already know that the iPhone 8 has a smaller battery than the iPhone 7

This is a 7% decline in battery capacity that Apple has to somehow make up for.

So how did it do and does the iPhone 8 last as much as the iPhone 7 in real life?

First, let's make one thing clear: the new iPhone 8 ships with the Apple A11 Bionic chip, which is now built on a more efficient, 10nm process that allows the chip to consume less energy while delivering the same or even higher performance. Also, the iPhone 8 has a glass back and supports wireless charging, both factors for the smaller battery size.

Before sharing our real-world experience with the iPhone 8, we had to run our battery test. This is a synthetic test that tests typical performance of a phone, with the screen set at 200 nits of brightness, a level comfortable for indoor use. Interestingly enough, even with its smaller battery, the iPhone 8 actually outscored the iPhone 7: it got 8 hours and 37 minutes on our test, while the iPhone 7 scored 7 hours and 46 minutes. Here is how this results compares to other phones out there.

Battery life (hours) Higher is better
Apple iPhone 8 8h 37 min (Good)
Apple iPhone 7 7h 46 min (Average)
Samsung Galaxy S8 8h 22 min (Average)
LG G6 6h 9 min (Poor)
Apple iPhone 6s 8h 15 min (Average)
Samsung Galaxy Note 8 7h 50 min (Average)
LG V30 9h 34 min (Good)
HTC U11 9h 3 min (Good)
Google Pixel 7h 45 min (Average)

Our test shows that the iPhone 8 also outdoes many Android phones in terms of battery life: with the HTC U11 being the clear exception and the top-ranking flagship phone for battery life at the moment.

And in real life, the iPhone 8 will last a full day, but not much more than that and we've noticed that stand-by time is excellent.

There is one more aspect to the battery experience on a phone and that is how long it takes to charge it. The iPhone 8 supports fast charging, but it does not ship with a fast charger in the box. That is a bummer for an already expensive phone. Using the stock charger, you still get depressingly slow charging speeds. Here are the results:

Charging time (minutes) Lower is better
Apple iPhone 8 148
Apple iPhone 7 141
Samsung Galaxy S8 100
LG G6 97
Apple iPhone 6s 150
Samsung Galaxy Note 8 102
LG V30 108
HTC U11 98
Google Pixel 119

We will test wireless charging times and fast charging the iPhone 8 in the near future and we will update this post as those results become available.

Related phones

iPhone 8
  • Display 4.7" 750 x 1334 pixels
  • Camera 12 MP / 7 MP front
  • Processor Apple A11 Bionic, Hexa-core, 2390 MHz
  • Storage 256 GB
  • Battery 1821 mAh(14h talk time)



1. ibend2

Posts: 159; Member since: Mar 16, 2016

2. ibend2

Posts: 159; Member since: Mar 16, 2016

tl;dw iPhone8 last slightly longer than iPhone7, but still far behind note7 and S8+ (even iPhone8+ still far behind note8, lol..)

5. nctx77

Posts: 2540; Member since: Sep 03, 2013

Where are the numbers to back up your claim that the iph8 plus is “far” behind the Note 8?

8. ibend2

Posts: 159; Member since: Mar 16, 2016

Not sure why I bother to reply this when the answer is obviously in that video i8+ 5H:35M note8 7H+

18. You_Dont_Say

Posts: 431; Member since: Jan 26, 2015


31. sissy246

Posts: 7129; Member since: Mar 04, 2015

Not at all. I unplugged my note 8 at about 7am yesterday and at 9:30pm I still had like 46% battery left. That was using it moderately all day.

49. darkkjedii

Posts: 31757; Member since: Feb 05, 2011

I'm at 80% right now, and unplugged at 3 this morning, decently heavy use. This phone is a beast.

69. Crispin_Gatieza

Posts: 3186; Member since: Jan 23, 2014

Talk to me Darkk. Just picked up the 8 this morning instead of a KEYone. Am I going to regret it? My typical day consists of 50-60 phone calls, 80-100 emails and 10-15 texts per day. I unplug at 5:00 AM and leave the office around 5:00 PM. I figure if a 6S+ could do it (barely), this should also without breaking a sweat. I had a Samsung S8+ earlier this year and it could hold its own, I just didn't like the phone for a multitude of reasons.

70. darkkjedii

Posts: 31757; Member since: Feb 05, 2011

That won't even be an issue. If you don't need the high accuracy features, turn off Bluetooth and WIFI always scanning in the location settings.

54. ecmedic4

Posts: 520; Member since: May 02, 2013

Yes and ibend2 failed to post this link in the drop test article. It shows the iPhone 8 doing better than the S8. Its done by the same youtuber that he posted a link to, but that video showed the note 8 fairing better, but of course he didn't post this one since it didn't fit his trolling. If he wants to troll, I'm gonna call him out on it. Hate trolls and immature idiots that can't simply talk about tech and let ppl like what they want to like, even if its different from their preferred brand/phone. If someone likes something else, it shouldn't be that big of a deal.

71. NoToFanboys

Posts: 3231; Member since: Oct 03, 2015

You look more furious than anyone here, and retarded at the same time.

78. Kibzara

Posts: 125; Member since: Feb 24, 2016

ofc we are, since this site worships iPhone in the dirtiest way ever, and bashing all other companies, giving them mediocre ratings by no reason, but all other reviewers say completely opposite... but, hey, who am i to judge, right?! scammers will continue to exist. without them, the world would be a boring place...

33. nctx77

Posts: 2540; Member since: Sep 03, 2013

Random YouTube videos are hardly scientific dude. You can search that app all day and get several different outcomes. The bottom line is that it’s a myth that iPhones have bad battery life compared to Android flagships. It only seems that way when you look at the battery capacity. It’s about real world use dude!

36. Finalflash

Posts: 4063; Member since: Jul 23, 2013

Yea, you do get several different outcomes but one thing is always consistent....bad battery life on iPhones. Real world usage is what is being tested and unfortunately, iPhones have, for the past decade, been the worst in them. Now if you do find a video of an iPhone winning anything battery life related, please go ahead and post it. Otherwise, like iPA, posting random numbers that one of their authors pulled out of their backside is not going to convince anyone.

55. ecmedic4

Posts: 520; Member since: May 02, 2013

I get excellent battery life from my iPhone 7 Plus, I don't consider myself a heavy user, more a moderate user but I've never had any complaint about my battery life. I easily make it thru the day. Measuring battery life is difficult because usage is so different person to person. Its really not that big of a deal either, as your not gonna buy an iPhone so it shouldn't matter so much to you or any other Apple hater. Just use what you like best and let others use what they like best, even if it is an iPhone. It was their money to spend. Ppl take this stuff WAY too serious. Also if you all think phone arena is so biased and fake, go to a different website. You are in no position to whine and complain when you continue to come here and read the articles about Apple/iphones when you can simply avoid them. You just don't want to do that, because you all want to act immature.

37. tedkord

Posts: 17509; Member since: Jun 17, 2009

Those tests were real world use.

46. AxelFoley unregistered

"YouTube videos are hardly scientific dude. You can search that app all day and get several different outcomes." And yet, you've posted Youtube videos. You guys are something else.

3. Victor.H

Posts: 1104; Member since: May 27, 2011

My favorite part in the first video is when he says that he set all phones "to a roughly equal level of brightness, as close as I could get it." So yeah, "as close as I could get it" is definitely not good enough. If you mess up brightness and don't use a tool to specifically set the screens to have equal brightness, then your test results carry no significance. Imagine if we set brightness on one phone at 150 nits, and on another to 250 nits. That could mean a HUGE difference. We use specialized equipment to set all screens to 200 nits and we have a standardized test that we run on all phones. It's up to you what results to accept, let's just clarify that we follow a scientific method, unlike those videos that you shared.

9. Sammy_DEVIL737

Posts: 1529; Member since: Nov 28, 2016

& what about your Note 8 brightness test fiasco which you carried out by your specialized tools??

74. Victor.H

Posts: 1104; Member since: May 27, 2011

Again, you need to understand how is brightness measured. The absurd 1,200 nit number that many people are throwing around is obviously measured at 1% white. We don't think that 1% white on the screen is a valid test for anything but pure curiosity, hence that absurd 1,200 nit number is merely for entertainment but has no real value as a real-life brightness measurement. And just to make it clear: we measure screen brightness at 100% white for all phones in the past 4 years or so.

81. trojan_horse

Posts: 5868; Member since: May 06, 2016

The 1,200 nit number is for entertainment purposes? What about offscreen benchmark which you guys also report on? I suppose you should say the same, since it isn't a real-life test - who uses a handset with the screen off? I see the 1% white measurement as a way to depict how bright can a display go, and there's nothing absurd about that. And I also doubt the 100% white test realistic either. In fact, with display manually set to max, the Note8 hits. 570 nits, according to Displaymate. That's still higher than the absurd 518 nits you guys say when writing Note8 articles.

83. Sammy_DEVIL737

Posts: 1529; Member since: Nov 28, 2016

Yup yup.... Lol you took so long to sugarcoat the things.

93. ecmedic4

Posts: 520; Member since: May 02, 2013

Your not gonna appease them no matter what you say. All they want to do is whine and complain about how biased toward Apple this site and all the authors are and how your all paid by Apple. Yet they continue to come here and click the Apple articles for the sole purpose of whining and being immature. Apparently ppl aren't allowed to like or use another brand other than samsung. I say if a person is gonna click an article for the sole purpose of trolling, they need to find another site to go to, otherwise they need to stop whining. Its a tech website, lets talk about tech like mature adults and realize not everyone is gonna like the same thing.

12. nikhil23

Posts: 505; Member since: Dec 07, 2016

How about a real world use case like setting brightness at maximum

75. Victor.H

Posts: 1104; Member since: May 27, 2011

Come on guys, are you kidding me. Those tests are a joke. Every screen has different maximum brightness, which obviously gives a clear advantage to the one with the lowest maximum brightness. Geez.

86. MrShazam

Posts: 987; Member since: Jun 22, 2017

"which obviously gives a clear advantage to the one with the lowest maximum brightness" Which is the iPhone as can be seen in the video, and as backed up by credible sources like Display Mate, yet it still lost miserably. Only joke here is your battery test that never matches any other credible reviews in the real world...but keep trying, maybe you'll fool some gullible readers with your BS.

14. PhoneInQuestion

Posts: 496; Member since: Aug 20, 2017

But you are obligated to positively headline the article... I said this before and I'll say it again, amateur tech bloggers are not your everyday iPhone owner. They don't get a review unit and are not spending more than an hour talking about a phone they will hand down in just a year when its battery life gets spectacularly worse than it already is.

20. ColinW

Posts: 413; Member since: Jun 04, 2014

Your observation about battery life is correct, brightness should be the same, as should be the resolution. They say in the video that they are set to the maximum brightness, so actually the Samsungs last significantly longer, even with higher resolution screens and much brighter screens. On a similar point, if you want to be consistent you should use the correct maximum brightness in your tests in this important area, as readability in bright light is important.

21. Jimrod

Posts: 1605; Member since: Sep 22, 2014

Why should resolution be set the same? Brightness makes sense (and not max because they will all have a different max) but resolution is what it is - if a manufacturer wants to power more pixels for higher resolution that's their choice, if it affects battery it's their design decision. Lower resolution may be a design choice to extend battery life by the same token.

22. xfire99

Posts: 1207; Member since: Mar 14, 2012

Funny, when there are negative about Android and u authors guys at iPhonearena never shows up and defend the real facts. But as fast there are negative about iPhone and directly U guys shows up and defend Apple. I'm sure everyone knows by know how biased some authors are.

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