KGI: iPhone 8 will squeeze a Plus-sized battery into a smaller form factor

By , Feb 13, 2017

KGI Securities analyst Ming-Chi Kuo issued a note to clients this morning, obtained by MacRumors, in which he predicted that Apple’s upcoming iPhone 8 would manage to squeeze a Plus-sized battery into a smaller 4.7-inch form factor, possibly having even better battery life than a 5.5-inch LCD iPhone.

This will be achieved by utilizing a pricier stacked logic board design—also known as a substrate-like PCB (SLP) mainboard—that would create additional space inside the device to accommodate a significantly larger battery.

The design should permit Apple’s engineers to squeeze a Plus-sized battery inside a device with a power-sipping, edge-to-edge OLED display and having similar dimensions to a 4.7-inch iPhone.

Here’s a passage from Kuo’s report:

As battery material tech isn’t likely to see major breakthroughs in the next 3-5 years, mainboard area can only be reduced via stacked SLP, which makes space for larger battery and extended usage time.

Thanks to stacked SLP, we expect the OLED iPhone to have similar dimensions to a 4.7-inch LCD iPhone, and have comparable battery capacity (equipped with around 2,700 mAh L-shaped 2-cell battery pack) to a 5.5-inch LCD iPhone.

Were iPhone 8 to use a battery similar to that inside 5.5-inch iPhones, that’d be a 50 percent power boost versus a 4.7-inch device. In fact, iPhone 8 could have even better battery life compared to the 2,900 mAh battery inside 5.5-inch iPhone 7 Plus models.

That’s because the phone will switch to an OLED display which is significantly more energy efficient than its LCD counterpart as it doesn’t need a backlight. The stacked mainboard design could result in up to 80 percent higher manufacturing costs for the component, supporting thesis that iPhone 8 will have a premium price tag of $1,000+.

The analyst speculated that the iterative LCD-based iPhone 7s and iPhone 7s Plus upgrades may not use stacked mainboard design, meaning their battery life could be comparable to the current iPhone 7 family.

Assuming Kuo knows what he’s talking about, his note could serve as yet another indication that iPhone 8 will indeed feature an all-new design with an edge-to-edge display and no or minimal “chin,” a relatively large area below the display.

KGI’s report comes just as Apple has officially joined the Wireless Power Consortium amid rumors that iPhone 8 would include wireless inductive charging, based upon the Qi standard overseen by the consortium.

Source: MacRumors

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  • CAIO MARIZ®

    5.2″ OLED, 2700 mAh in the same dimensions of iphone 7…
    This is a dream

    • nova12

      no kidding. put me down for $1000 if these rumors continue in the direction they’re going.

    • Siri Tim Cook Holness

      I refuse to believe they’d make the premium device smaller than the plus it’ll be at least as big or bigger

      • Gaius Marius

        I think
        iphone 8 5,2″
        iPhone 8 Plus 5,8″

      • Siri Tim Cook Holness

        But no mention has been made of 8 plus and it’s just kind of weird if there’s no 8 plus I’ll buy the lower end model

      • Gaius Marius

        There was a mention about iphone 8 5.8 inch

      • Siri Tim Cook Holness

        Then again there’s rarely ever been any leaks of the larger devices

      • Hussain Alsanona

        Me too. I think iPhone 8 will come in two sizes

    • Sohail Wahab

      This was my dream, don’t steal it

  • Hussain Alsanona

    Is it possible to fit 5.8″ display in a 4.7″ iPhone model? In my opinion that won’t be possible but it may be smaller in form factor to the 5.5″ iPhone, but still larger than the 4.7″ iPhones and yet visually similar.

    • Siri Tim Cook Holness

      People are saying it’ll be 5.2 inch or something I refuse to believe they’d go back to their premium device being a smartphone it’s been a phablet since 2014 so I won’t believe it til I see it I think it’ll be at least the screen size of the current plus if not bigger

      • Juschan

        Hopefully not a 5.0- 5.2 inch screen is still the perfekt size in my opinion… its still good in the pocket and possible to use one handed

      • Siri Tim Cook Holness

        I don’t use it 1 handed and 5.0-5.2 is way too small I’m used to using a phablet now and phablets are just way better for my use case I play a lot of games and watch a lot of videos bigger is better for that u gotta see it from both sides perspective they should stick to 2 premium devices and giving the larger one more gimmicks

      • Juschan

        Yea definetly two sizes would be gorgeous but if you watch videos a lot why dont u use an iPad ? And if the bigger one would get festures i use on daily basis like wireless charging i’d probably be getting that two

      • Siri Tim Cook Holness

        Bc I prefer 1 device to do everything and iPads don’t fit in your pocket

      • Siri Tim Cook Holness

        I’d get the bigger one regardless of whether it gets additional features bc I’m used to 5.5″ now but I’m assuming it will get additional features the larger one of the last 3 generations did

    • nova12

      from corner to corner, my ip7 is about 5.75″. if the whole face was a screen, that’s pretty close to 5.8″. Videos would obv be smaller because of proportions, but home screen display would still be 5.8″-ish.

      not saying that’s the plan, just noting the current screen size.

  • Siri Tim Cook Holness

    Seriously I refuse to believe they’d make the premium device smaller than the plus

    • Steve Jobs

      Or they could stick to two premium devices. Now you know how us 4.7 inch users felt about the 8 being exclusive to the larger size.

      • Siri Tim Cook Holness

        There’s been no mention of a plus sized iPhone 8 tho which sucks for plus users we don’t wanna go back to using a smartphone and it’s really not its form factor is supposedly closer to the 4.7 but I refuse to believe it

      • Steve Jobs

        And all original reports said that the iPhone 8 would be exclusive to a 5.8 inch screen, which us regular sized iPhone users can’t use comfortably. Just like Plus sized don’t want to deal with something that’s small to them, others don’t want to deal with something that seems like a mini tablet to them. Either way, an entire group loses, which is why it’s idiotic to defend only one size for the iPhone 8. I’ve seen so many defending Plus sized exclusive because /they/ have a plus, and for the most recent rumor I’ve seen people defending regular sized exclusive iPhone 8 because /they/ have a regular sized phone.

      • Siri Tim Cook Holness

        I’m not defending a single model it just doesn’t look like there will be 2 models and I don’t see them making their premium device a smartphone again bc it’s been a phablet for the last 3 generations

  • Hussain Alsanona

    My prediction for this year iPhones,
    Two lower models iPhone 7s and 7s Plus.
    Two new design iPhone 8 with 5.0″-5.2″ and iPhone 8 Plus or Pro (whatever they end up calling it) 5.8″OLED display.

  • Steve Harold

    If the whole thing is screen that would be stupid how am I supposed to put a case on that?

    • mickey

      Most cases don’t cover the screen?

      • Steve Harold

        Cases at least have to go a hair over the bezel.

      • mickey

        I don’t believe it will be an issue once case makers get specifications. There are plenty of cases for the Samsung galaxy edge that work fine. And if you look at an actual bezel-less phone like the xiaomi mi mix, there is still a sliver of bezel.

  • Agneev Mukherjee

    Even sweeter, make it 4000mAh!