Battery Life

Battery life of the OnePlus 8 Pro was a big question-mark for a lot of users given the phone’s 120Hz refresh rate. Several weeks ago I had reported on my initial power draw investigation results covering the different display modes of the screen:

Much like on the Galaxy S20 series, the OnePlus 8 Pro incurs a large static power draw penalty when switching from 60Hz to 120Hz. This is a increase in the baseline power of the phone, no matter the type of content that you’re displaying, and will even incur on a pure black screen.

OnePlus 8 Pro Baseline Power usage (Black Screen)

Whilst OnePlus does include refresh rate switching mechanisms based on scenarios such as video playback, the lack of a true variable refresh rate (VRR) mechanism that works on the per-frame basis and is implemented on the deeper OS and GPU driver levels, means that current generation high-refresh rate devices will have to suffer from a larger than usual power and battery life penalty.

Web Browsing Battery Life 2016 (WiFi)

In our web browsing test, we see the clear impact of the 120Hz refresh rate on the OnePlus 8 Pro as it reduces the battery life of the phone in the test by 22% compared to its regular 60Hz mode. As a note- we’re testing at QHD resolution here as generally there’s very little power benefit from using lower resolutions.

In terms of absolute results, the 9.71h of the 120Hz mode here are adequate but not great. The results fall in line with the S20+ at 120Hz, but short of the bigger battery capacity of the S20 Ultra. At 60Hz, the 8 Pro moves back in at 12.31h which is a great result and will get you through even the most extensive usage days.

Whilst many will have looked forward to the OnePlus 8 Pro results, the really interesting results belong to the smaller OnePlus 8. The phone here was able to showcase outstanding battery life figures. The 90Hz mode only has an 8% impact on the battery runtime in this test, and in the 60Hz mode the phone lasted for a staggering 14h which is amongst the best results we’ve ever measured on a phone.

PCMark Work 2.0 - Battery Life

In PCMark, the smaller OnePlus 8 again takes the lead in terms of longevity with its 60Hz mode. The 8 Pro also does quite well at 60Hz, and both phones lose respectively 15.4% and 16.4% of their runtime when switching over to 90Hz and 120Hz modes.

Whilst the OnePlus 8 Pro pretty much fell in line with what we’ve expected in terms of its battery life, falling in line with the 120Hz power behaviour of the S20 phones, it’s the regular OnePlus 8 which surprised a lot given that it features a slightly smaller battery, notably surpassing the efficiency of the OnePlus 8 Pro. Given its form-factor and weight, it’s easily the longest-lasting device of its class, with only other heavier, bigger battery phones being comparable in terms of battery longevity.

Display Measurement Camera Recap - Amongst The Best


View All Comments

  • golemB - Monday, July 6, 2020 - link

    Really, superflex? You had to go to racism? Reply
  • Kishoreshack - Monday, June 29, 2020 - link

    This phone is even better than the s20 line & way cheaper than them
    OnePlus is the pioneer of android os at this moment
    The only complain I would have is from One plus 7 pro
    Went from full screen to a punch hole in the screen
    I mean these people spend soo much on screen technology & then punches a hole in the screen which cuts out content
  • Kishoreshack - Monday, June 29, 2020 - link

    Very important question
    Has one plus done a very good job with 4500mah battery or
    Samsung has done a bad job with it's 5000mah battery?
  • Andrei Frumusanu - Monday, June 29, 2020 - link

    They're both falling within the same range in terms of efficiency. Reply
  • Kishoreshack - Monday, June 29, 2020 - link

    The best part of this phone is it's competitively priced in India
    It's an absolute steal for that price
    It outdoes S20 line up in majority of things & is way cheaper than it
  • Dexter101 - Monday, June 29, 2020 - link

    In the Indian market Oneplus phones are pretty good with their pricing, though I don't see how they beat the S20 line 'in a majority of things'. What things does it do better that a user notices day to day? Reply
  • flyingpants265 - Monday, June 29, 2020 - link

    No front stereo speakers = no buy. I refuse to cup my hand around a phone to try to hear it in all conditions over background noise, whether home or outside. All phones should have front stereo speakers, there's absolutely no excuse not to have them, they can be mostly hidden behind glass.

    Is that a typo in the title?
  • Andrei Frumusanu - Monday, June 29, 2020 - link

    It does have stereo speakers, albeit the bottom one is traditional bottom firing. What title? Reply
  • Maxpower2727 - Monday, June 29, 2020 - link

    Like basically all other flagship phones, this has a front-firing speaker at the top of the phone and a bottom-firing speaker at the bottom, which is a stereo configuration and sounds great (no cupping needed). There are no manufacturers making flagship phones with dual front speakers, so unless you want to keep using an old phone, you're going to be out of luck. Reply
  • flyingpants265 - Monday, June 29, 2020 - link

    No, it doesn't sound great, it sounds weird. The directionality of the sound is noticeable, it's awkward and unnecessary when I could just have loud, clear speakers facing me directly, like in landscape mode watching a movie or playing a game with a controller. The only reason we don't have front speakers on every phone is that companies want to save 2mm and $2 on a $999 phone, and you've been taught to accept it, just like the lack of a headphone jack.

    And not true, the Xiaomi Black Shark and Nubia Red Magic have front stereo speakers. They might be my only choice at this point, too bad they're missing other useful features.

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