Battery Life

Battery life of the new iPhone 12 series has been quite controversial. This is due to a couple of reasons, but primarily due to the fact that Apple has reduced the actual capacities of the batteries this generation. The new iPhone 12 and 12 Pro come with a very conservative 2815mAh unit, which is less than the 11 Pro’s 3046mAh or the 11’s 3110mAh capacity. It’s extremely unusual to see battery capacities regress like this, particularly in a time where the Android competition routinely use +4000mAh batteries. Apple does have a huge SoC efficiency advantage, but that only goes so far to bridge the battery capacity deficiency for the new iPhones.

Another controversial aspect is the 5G connectivity of the new devices. This generation, Apple made the move back to using Qualcomm modems as Intel seemingly wasn’t able to supply them with a satisfactory 5G option. Last year, Apple had purchased Intel’s modem division for $1B, but it’s likely we’ll have to wait a bit more to see the vertical integration of that acquisition.

iPhones in the US are the only models which also feature mmWave connectivity, as the rest of the world “only” gets sub-6GHz variants. Unfortunately the models I have for review here are European and mmWave isn’t an option, and I also don’t yet have any sub-6GHz 5G coverage in my area yet, and as such, I can’t really comment much on the cellular battery life of the new phones.

Web Browsing Battery Life 2016 (WiFi)

That being said, in our regular Wi-Fi web browser test, we’re seeing very good results for both the iPhone 12 and 12 Pro. Although the 12 Pro has a 7.5% smaller battery and a larger screen than the 11 Pro, it lasted only 3% less than its predecessor, meaning that the SoC and display power efficiency gains this generations were enough to mostly counteract the smaller battery.

The iPhone 12 lasted 11% less than the iPhone 11, but that was quite expected given the 10% smaller battery and also the move from a low-resolution LCD to a higher resolution OLED panel. At 12.53h it’s still an absolute excellent result.

Apple’s decision to stick with 60Hz panels this generation, while not great in terms of fluidity of animations compared to other competitor devices, at least made a lot of sense for the battery life of the phones. 120Hz really only makes sense on the newer Note20 Ultra with its new “HOP” panel, but even that has some quirks here and there. I expect the iPhone 13 generation to finally embrace higher refresh-rate displays, once all the power efficiency concerns have been fully resolved.

Overall, the new iPhone 12’s battery longevity looks to be in line with last generation’s devices, especially comparing 11 Pro vs the new 12 Pro. While 5G remains a wildcard, especially for US users which are on mmWave carriers, it’s always something you can disable, even though that’s a suboptimal option to resort to.

Display Measurement Camera - Daylight Evaluation
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  • iphonebestgamephone - Tuesday, December 1, 2020 - link

    Ah the realme x, the gold standard of all budget phones with a flagship soc.
  • RSAUser - Tuesday, December 1, 2020 - link

    That mini is making me quite tempted to move over, been looking for a good small phone to upgrade to since Samsung dropped continuing the S10e line.
  • eastcoast_pete - Tuesday, December 1, 2020 - link

    Just out of curiosity: can you record in 4K60p with Dolby until the storage or the battery runs out, or does the iPhone 12 go into thermal shutdown like so many "action cams"? I know this is a niche question, but maybe you, Andrei, or someone else here has tried it?
  • Bob Todd - Tuesday, December 1, 2020 - link

    I just did a quick test for you, 30 minutes of 4k60 with Dolby Vision on. No thermal issues here on a 12 Mini.
  • HalideRadar - Monday, January 4, 2021 - link

    iPhone 12 mini doesn’t support Dolby Vision at 4K60, only up to 4K30
  • zepi - Tuesday, December 1, 2020 - link

    Any hope for 12 pro max camera test?
  • radoslavp - Tuesday, December 1, 2020 - link

    I'm really puzzled by what is happening.
    All reviews on the Internet say how great the battery life of Iphone 12 series is, however in the mean time there are thousands of owners who complain about ridiculously bad battery - drain, 5G battery issues all over the place, yet no one is publicly speaking about it.

    I will share just one link: https://discussions.apple.com/thread/251956914

    If you type "iphone 12 battery" in google you will end up with countless complains ........ yet not a single line with all reviewers.

    Strange isn't it?
  • Bob Todd - Tuesday, December 1, 2020 - link

    Basically every smart phone released since forever has quite a few threads about battery drain problems from some users. You also need to take into account the population size here. I'm sure Apple has sold more than a million units across the range already. My anecdotal rebuttal to anecdotal accounts of problems is that my 12 Mini with the smallest battery has surprised me with how good the battery life is. I skipped charging it a few nights ago and went to sleep with 62%. In the morning it was down to 56%. No low power mode, no turning off any radios, and it was losing less than 1%/hour at idle with all the usual suspects like multiple Gmail accounts, an Exchange account, Facebook etc. setup. Just before midnight the next night it was down to 10%. TL;DR: I think they can all make it through a day of "average" use easily.
  • PickUrPoison - Saturday, December 12, 2020 - link

    There are definitely some 5G issues with this switch to a new modem/radio. I’d think that between Apple and Qualcomm they have enough engineering resources to dial it in.
  • theblitz707 - Tuesday, December 1, 2020 - link

    its a shame you guys dont test minimum brightness anymore :( Im very interested in black clipping

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