Battery Life

At this point, battery life is one of the number one priorities for a phone. While in 2013 our primary tests consisted of the web browsing test and video playback tests, we've expanded our suite to include Basemark OS II and GFXBench to simulate intensive general usage and gaming, respectively. For all of our tests in which the display is on, we calibrate the brightness of full white to be 200 nits in order to standardize and attempt to control for extraneous variables as much as possible. While this may seem arbitrary, it's important to do so to draw real conclusions about which phone has better battery life. 200 nits on a phone can be as low as 50% and as high as 90%, so setting a standardized brightness percentage would not be an effective method of controlling for display brightness. With that in mind, let's get to the battery life tests.

Web Browsing Battery Life (WiFi)

Here, we see that the OnePlus One takes the number three spot for battery life amongst phones and phablets. This is definitely a great result to start with, and is a solid 20% higher than the One (M8). However, the Huawei Ascend Mate 2 continues to hold its position with a long lead over just about anything else available in the market today.

Web Browsing Battery Life (4G LTE)

We can see a similar story in LTE web browsing battery life. However, the OnePlus One manages to close up the lead that the Ascend Mate 2 holds in WiFi browsing. It's likely that the 28nm LP process and lack of envelope tracker is responsible for closing the gap in this regard. It's interesting to see how the iPhone 6 Plus trails behind the OnePlus One here, but it's likely that this difference is due to the fact that the iPhone 6 Plus has an off-die modem compared to the OnePlus One's on-die modem.

BaseMark OS II Battery Life

BaseMark OS II Battery Score

White battery life tends to fall towards the bottom here, we can see that the reality is that the OnePlus One performs quite well, which indicates that there's relatively little throttling to speak of and that the OnePlus One is simply doing well by sustaining high levels of performance.

GFXBench 3.0 Battery Life

GFXBench 3.0 Performance Degradation

We see the same story in the GFXBench rundown. The OnePlus One manages to set a new record for final run FPS among phones and phablets, although battery life is near the bottom of the pack. It seems that if there's any one reason for the escalating display size wars, it is to increase battery life. While by no means a clear order, we can see that the larger battery more than compensates for the larger display of the OnePlus One. This makes sense, as a phone should have a fixed size circuit board. Therefore, by increasing display size the circuit boards become smaller relative to the rest of the phone, and all of the area opened up by increasing the size of the phone can be taken up by the battery. Overall, the OnePlus One is almost as good as it gets for battery life in a phone, with excellent sustained performance under load.

Charge Time

To really have a holistic understanding of battery life, we must also take a look at charge time. While battery life can be the only determinant of mobility, in cases where usage is heavy enough that the battery or multiple batteries have to be charged, charge time can become incredibly important. To this end, OnePlus includes a 5V, 2.1A charger in the box to quickly charge the rather large 11.78 WHr battery.

Charge Time

Somewhat surprisingly, the OnePlus One does a great job in this test, coming quite close to other devices with QC 2.0 fast chargers like the Galaxy Note 4 which is definitely good to see. Overall, this makes the OnePlus One one of the best phablets on the market for battery life.

Display Camera UX


View All Comments

  • wrkingclass_hero - Wednesday, November 19, 2014 - link

    Wow, I am surprised that you guys reviewed this. Thank you. Reply
  • leexgx - Saturday, November 22, 2014 - link

    not read the review yet but one note for EU buyers who want 4G it lacks band 20 4G800 support so it may not work on some networks in the EU (like UK O2, part support for EE and 3 due to some masts using 4G800), they need to make a revision EU model that supports the band 20 Reply
  • MantasPakenas - Monday, November 24, 2014 - link

    I'm surprised they didn't review some other great phones that are actually for sale. E.g. Sony Xperia Z3 (including the compact version)... Reply
  • paulstraker6 - Tuesday, November 25, 2014 - link

    I have an invitation to buy this phone If anyone want to use it.

    INVITE CODE - GLC0-VOVS-HM2M-UZDX - One - 64 GB Sandstone Black.

    Pls use the above link or inv code to buy the phone and need to use it today.
  • garretelder - Thursday, December 4, 2014 - link

    The OnePlus One will never rank among the top phones (see rankings such as Reply
  • paulstraker6 - Tuesday, November 25, 2014 - link

    I have an invitation to buy this phone If anyone want to use it.

    INVITE CODE - GLC0-VOVS-HM2M-UZDX - One - 64 GB Sandstone Black.

    Pls use the above link or inv code to buy the phone and need to use it today.
  • flyingpants1 - Wednesday, November 19, 2014 - link

    Great battery, but too big. 5.25" should do it. Reply
  • Ortanon - Wednesday, November 19, 2014 - link

    Size problems aren't just a screen thing: Reply
  • tipoo - Wednesday, November 19, 2014 - link

    Yeah, but it couldn't have accommodated such a large battery with a smaller one. It's bezels are also a bit larger than some phones with the same or larger screen size, but same thing there, it's for the battery, no space is wasted. Reply
  • dragosmp - Wednesday, November 19, 2014 - link

    They could make it thicker :) Reply

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