Battery Life

We find a monstrous 4100mAH battery inside of the Mate 7 which should theoretically provide it excellent runtimes. Let's see if that is the case.

Web Browsing Battery Life (WiFi)

The Wifi web-browsing test ends up at 13.5 hours for the Mate 7. While this is a enormous lifetime for usual Android devices, it's pretty disappointing in conjunction with the size of the battery. The iPhone 6 performs almost equally with a 1200mAh smaller battery. Even the Note 4 with its AMOLED screen which is usual unfavourable to our web-browsing test isn't too far behind with its 3200mAH battery. Of course the Mate 7 has a slightly bigger screen, but it's still only 1080p compared to the Note 4's. I would have expected the Mate 7 to be in the range of its predecessor, the Mate 2, but that device remains very lonely among the top of our battery charts.

I did not do a objective run on 4G to be able to test the new Balong modem inside the Kirin. This is mostly due to a very different test environment than what we've ran our previous devices, mostly by Josh and Brian under 700MHz on AT&T. Here in Luxembourg we still only have access to 1600MHz LTE while 800MHz EUDD is still being freed for commercial use. As such, I prefer to avoid publishing any misleading numbers until I get a good portfolio of devices which I can all run under the same test conditions.

I can however give my subjective opinion on the matter: I haven't been impressed at all by Huawei's new modem. In daily usage under a mobile connection the device gets quite hot and drains the battery more than other devices sporting Qualcomm modems. I'm very skeptical of Huawei's modem and RF back-end, and hope that in the future they'll be able to improve power consumption.

BaseMark OS II Battery Life

You might be wondering where the Mate 7 is on the BaseMark OS II graph. The truth is rather ugly.

I've tried several times to complete the battery test on BaseMark OS II and failed each time. After 25 minutes the device would shut off due to overheating and reach scorching hot temperatures. This is the hottest I have ever seen any mobile device be, and I could not comfortably hold the device after it crashed on the test. The phone discharged at a rate of 0.7% per minute during those 20 minutes, meaning it should have reached about 2.3 hours of lifetime, again one of the worst scores we've ever seen, short of the Honor 6. This projects a sustained TDP of about 6.5W, much above what a phone factor is able to dissipate.

I've already criticized the lack of any power arbitration mechanism back in the Honor 6 review and saw that the thermal policies were behaving weirdly. To see this continue on the Mate 7 is disheartening. The fact that Huawei's thermal policies catastrophically failed to maintain the device running and avoid a critical shutdown at mere 21°C indoor room temperature is basically inexcusable. All I can say is that I'm left baffled by this discovery, as the Mate 7 marks the first device to fail this test.

GFXBench 3.0 Battery Life

The GFXBench 3.0 battery run is much improved over the Honor 6, again due to more aggressive thermal throttling on the GPU. Here the Mate 7 manages to reach 5.6 hours lifetime, but with a great performance sacrifice.

Overall, I deem the Mate 7 battery life to be bad, and a step back in terms of efficiency. For users who just browse a lot with their device or frequently use social media applications, the Mate 7 performs quite well. If you are a frequent gamer, I'd strictly recommend against the Mate 7.

Charge Time

The Mate 7 uses a what has now become a standard 5V 2A charger. The charger IC sets up a 1750mA input power rate which ends up at around 7W charge power in the fast-charge phase of the battery before it slows down to three slower phases of trickle-charging.

Charge Time

We see a similar charge curve as on the Honor 6; the power decreases a lot after reaching 85% at the 100 minute mark and it takes another 85 minutes to fill the last 15% for a total of a little over 3 hours. This is neither bad considering the 4100mAh battery, but nothing to write home about either, especially since we've seen in the introduction of chargers at increased voltage operation. 

 

 

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  • Andrei Frumusanu - Monday, December 8, 2014 - link

    Here at AnandTech we post objective and reproducible benchmarks, this includes the battery test.

    Of course the phone will last 3-4 days if you use it lightly, but this all depends on your personal usage, your environment, the brightness of the screen and a plethora of other variables.
  • Bondurant - Friday, December 5, 2014 - link

    Interesting to note also that phonearena's battery test results puts Mate 7 to be better than Note 4

    HUAWEI ASCEND MATE7 9h 3 min (Excellent)

    SAMSUNG GALAXY NOTE 4 8h 43 min (Excellent)
    SONY XPERIA Z3 9h 29 min (Excellent)
    HUAWEI ASCEND MATE 2 4G 11h 26 min (Excellent)
  • Andrei Frumusanu - Monday, December 8, 2014 - link

    The Mate 7 also leads the Note 4 in our tests, but only by 12%. Considering the Note 4 powers a QHD screen and has 900mAh higher battery capacity, means that the Mate 7 is much less efficient.
  • Ethos Evoss - Wednesday, December 24, 2014 - link

    because they like slagging chhinese mobiles and they ar isheeps so they dont want look bad bcos they own all iphones..
  • Bondurant - Wednesday, December 3, 2014 - link

    With regards to the UI, you mentioned the theme also customized the buit in apps, but if you notice carefully even by a basic change of the wallpaper, the whole UI and in built apps cleverly adapts to the color of the wallpaper in an elegant way. I love that aspect on the Emui3.0 and is way advanced then the amateurish theme implementation to come on Samsung.

    There are a plenty of other aspects you UI you didn't mention, like swiping down from anywhere in homescreen you get a indepth search option, or the double click vol down on screen off for 0.6 second quick shot photo or the pretty gallery interface and other minor aspects like the addition of a button on navigation bar to bring down notification panel, their one hand UI unique implementation of moving keypad to a side by motion gesture, long press of multitask navigation button to switch quick between last two used apps (they have also added split screen functionality in their latest update of Emui3.0 in China).
  • Andrei Frumusanu - Wednesday, December 3, 2014 - link

    EmUI 3.0 has a huge amount of features like the one you mentioned, but I can't allocate several pages just to mention every small feature found in the phone. Things like the configurable navigation buttons are for example visible on my screenshots, and much more if you look at the UI gallery.
  • Hrel - Wednesday, December 3, 2014 - link

    "5.9” Stopped reading.

    Stupid phablets, can I get a 5" phone again? PLEASE?!
  • Ethos Evoss - Saturday, December 6, 2014 - link

    yeah get honor 6
  • Arbie - Thursday, December 4, 2014 - link

    Especially on a big-ticket item like this, I see a non-replaceable battery as a major negative. I don't mean non-swappable; I mean not user-replaceable at all.

    There are years of experience with such things by now, especially among the folks on this forum. What are people doing when their tablets or high-end phones won't charge anymore and they can't replace the battery themselves? Send it in to the manufacturer? Throw away a $500 item? Are there reliable US third-parties that do it quickly and cheaply?
  • spixel - Saturday, December 6, 2014 - link

    So did you actually do a real gaming test on this phone, or just basemark? Because I don't play basemark and neither does anyone else.

    You should put more emphasis on the real life performance of the phone and not results from benchmarks.

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