Battery Life

Continuing to the battery life benchmarks we should expect the Mate 8 to perform very well, thanks to the high efficiency of the Kirin 950, an LCD screen as well as the 4000mAh / 15.2Wh large battery.

Web Browsing Battery Life (WiFi)

Starting off with our WiFi web-browsing test we see the Mate 8 just get short of 13.5h of battery life. The interesting comparison is here to last year’s Mate 7 as it seems the actually last just as much. This may point out that the screen efficiency measured in our display power testing was maybe correct and the Mate 8 is less efficient. Another aspect is that the Mate 8’s overall platform power consumption hasn’t seen much improvement and thus still represents a large barrier for battery life.

Web Browsing Battery Life (4G LTE)

On the 4G LTE test we see that the Mate 8 loses out its advantage over the competition. Again I’m testing under rather mediocre signal conditions so it’s not a valid apples-to-apples comparison to devices reviewed by Joshua or Brandon, however when comparing it against for example such as the Nexus 6P which was tested under the same conditions we see that the Mate 8 faces a much larger battery life degradation going from the WiFi to the LTE test. The reason for this can only be that the Kirin 950’s modem and RF back-end just aren’t as efficient as Qualcomm or even Samsung’s.

PCMark - Work Battery Life

While the web-browsing tests didn’t represent a large improvement for the Mate 8, we see PCMark put the phablet as the current undisputed leader among high-performance devices. Here the difference to the Mate 7 is almost 4 hours, or around a 65% increase in battery life. The increase is most certainly linked to the new SoC’s power efficiency.

BaseMark OS II Battery Life

BaseMark OS II’s battery test is more of a maximum load type test that depends on the allowed maximum TDP of the phone. With a 15.2Wh battery and a runtime of 4.2h we see an average consumption of 3.6W, roughly the same amount of power that I saw that the device was able to sustain in our CPU thermal test.

GFXBench 3.0 Battery Life

Finally the GFXBench battery test shows that the Mate 8 doesn’t show very good battery life but this is a two-edged sword. As we’ve seen in the GPU section the SoC hardly throttles under heavy GPU load and thus retains its maximum performance for the duration of the test. Considering that the Mate 7 slowed  throttled down to 9-10fps and the Mate 8 does not go under 40fps, it still shows that the Mate 8 is twice as efficient as the Mate 7 even though overall battery life is almost twice as short.

At 200 nits the Mate 8 averages an idle power consumption of 989mW and we saw that system load power for the T-Rex test is 3.64W. 3 hours battery runtime averages 5W of power, near the 4.6W we theorized. The small difference may be due to the overhead of actually running the on-screen test and thus also not able to show the DDIC’s savings thanks to PSR due to continuously changing screen content.

Overall I’ve been extremely impressed by the Mate 8’s battery life. In everyday usage this is the longest-lasting device I’ve had the opportunity to use. The Kirin 950’s efficiency is outstanding and is truly able to earn its place among the top for this generation. It seems the Mate 8’s limiting factors are related to the screen and general platform base power consumption, something that Huawei may be able to improve in future devices and thus get even better value out of the Kirin 950.

All being said, if you’re looking for a long-lasting device, you can’t go wrong with the Mate 8.

Charge Time

The Mate 8 advertises fast charging out of the box so that even considering it having a large 4000mAh battery, it should still be fast to fill up when in need. The stock charger is a 9V/2A (18W) unit. I’m not sure if the charging enumeration protocol is based on Quick Charge or Adaptive Fast Charging, but it was able to enable fast-charging on Samsung phones while the Mate 8 didn’t fast-charge on Samsung’s charger, meaning the Huawei charger is likely a Quick Charge unit and the Mate 8’s PMIC and voltage negotiation IC seems to only accept Quick Charge.

Charge Time

As we see in the charge graph, the Mate 8’s battery cell gets charged at up to 11.5W during the fast-charging phase, being able to reach 80% in 68 minutes around little under 40% charge for each half hour of charging. The last 20% takes up to another 70 minutes as the device switches over to trickle-charging.

While the Mate 8 ends up with total charge time of 2.56 hours, what counts is that the initial 80% of battery capacity can be charged very fast so the Mate 8 is no slouch in this metric.

Display Measurement & Power Camera Still Picture Performance
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  • s.yu - Saturday, January 16, 2016 - link

    You're the real pathetic one. Falling for the Huawei crap. Just watch, Kirin 950 will end up among the slowest of all SoCs using a72, just watch. Reply
  • Ethos Evoss - Sunday, January 24, 2016 - link

    Jesus just go away weirdo..where am falling ? And u talking bullshit..it is fastest phone.. Reply
  • tuxRoller - Tuesday, January 5, 2016 - link

    How is the n6p's color calibration "iffy"? Just toggle srgb and it's one of the best calibrated screens available. Also, dxomark ranked the n6p camera as better than the new iPhone. Yes, post processing takes awhile BUT it's in the background and you can capture photos in the meantime. Reply
  • Ethos Evoss - Wednesday, January 6, 2016 - link

    You stupidly and naively went for ''tacky'' boring iphone JUST because it has highest bars on pictures right .. OOh man I hope you will grow up within few years and realize how naive you were yesterday .. Saying that android phones are bad is just stupidity of person.. And media and internet pushed you to buy ancient same iphone with boring icons only on home screen.. Reply
  • osxandwindows - Wednesday, January 6, 2016 - link

    If you are a nerd, its boring.
    From a normal users perspective, its just a phone.
    What if he went with an iPhone?
    Thats his own problem.
    Reply
  • phexac - Thursday, January 7, 2016 - link

    It was like 3 days before the Android police showed up. I was getting worried all of you on this site had grown up! Reply
  • ummduh - Friday, January 8, 2016 - link

    I almost went there myself. Every single 2015 phone has some kind of fairly major compromise. Not a single one did/does everything. Great phone, no OIS. Great phone, no SD card. Great phone, no nfc. Great phone, 32GB max storage and no SD. Etc, etc.. 2015 phones need to just go away already. I ended up giving the 64GB S6 a go, just because my Note 4 was getting to be too big and getting in the way. I regret that, and will be dumping it as soon as something else viable comes along that isn't making me compromise.. It may end up being apple, unfortunately. Reply
  • s.yu - Saturday, January 16, 2016 - link

    lol wrong. S6 crapware?? Blame your vendor! Or get it TOTALLY CLEAN like I did in Europe! The memory leak was fixed months ago, 3-4 firmware updates ago!
    "Samsung Edges? Looks GREAT but the edge is a useless gimmick and makes the phone harder to hold."
    ?? At least it looks great unlike any other of those on your list! And I don't think it's hard to hold at all, how it feels in the hand also has to do with what case/frame you get to go with the phone.
    Reply
  • tipoo - Tuesday, January 5, 2016 - link

    Looks like they decided to pair decent CPU performance with ho-hum GPU performance. I'm curious if this visibly affects the performance of any high end games at present, or if they're all still tailoring to the average market performance where far lower end phones can still run every game fine. Reply
  • syxbit - Tuesday, January 5, 2016 - link

    decent CPU? It's the best CPU available that isn't shipped by Apple Reply

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