On 10 screen curtain may save battery for the first time in iPhone history.
Take care > Den 26. sep. 2017 kl. 15.30 skrev Mary Otten <[email protected]>: > > > Comment: Why the iPhone X appears to be power-hungry despite more efficient > OLED screen > 9to5Mac / Ben Lovejoy > > > We noted earlier a Chinese regulatory filing that appears to confirm an > earlier report that the iPhone X will come equipped with 3GB RAM. That same > filing also contains another interesting number: the apparent battery > capacity. > > Serial leaker Steve Hemmerstoffer tweeted the image showing a battery > capacity of 2716mAh – even higher than the 2691mAh battery found in the > iPhone 8 Plus, with its far less power-efficient LCD screen … > > > LCD screens use a backlight to light up the entire display area. Even an area > of the screen that is solid black gets the same amount of light, it is simply > blocked by the black LCD pixels. OLED, in contrast, lights individual pixels, > without any backlight required. A black area of the screen therefore uses no > power. > > It’s difficult to find true like-for-like comparisons, as manufacturers > typically take advantage of the power efficiency of OLED by making their > displays brighter. But a little Googling suggests that an OLED screen ought > to use around two-thirds the power of an equivalent LCD one. > > The iPhone X does, of course, have a somewhat larger display than the iPhone > 8 Plus, at 5.8 inches rather than 5.5 inches, but 5% more display area is > relatively trivial compared to the power savings of OLED. > > This suggests, then, that there’s other technology in the iPhone which > requires significantly more power than less advanced models. > > One obvious candidate is the optical image stabilization system. While the > iPhone 8 and iPhone 8 Plus have OIS on one camera, the iPhone X has it on > both cameras. OIS has motors that physically move the lens to counteract hand > movements, and this requires significant amounts of power. > > A second likely suspect is the TrueDepth camera system. This is used not just > for face recognition for unlocking the phone and authorizing Apple Pay > transactions, but also for the new Animoji feature and the Portrait Mode when > used with the front-facing camera. > > The TrueDepth camera requires an infrared ‘flood illuminator.’ Although it > doesn’t use visible light, this will use power levels not massively > dissimilar to a visible-light flash, but will be operating for much longer > periods. > > So even with a larger battery and much more power-efficient display, Apple > clearly finds that the extra features on the iPhone X eat significant amounts > of power. It cites 12 hours of Internet use and 13 hours of video playback > against an hour more of each for the iPhone 8 Plus. > > When it comes to recharging your iPhone X or iPhone 8 battery, you’ll have > the choice of fast-charging via wire or wireless charging with a pad, > wireless charging without a pad or using furniture. Manufacturers of Qi > chargers have wasted in no time in adding iPhone compatibility to their > product descriptions. > > Check out 9to5Mac on YouTube for more Apple news: > > > > Original Article: https://9to5mac.com/2017/09/26/iphone-x-battery-capacity/ > > > Sent from my iPhone > -- > The following information is important for all members of the V iPhone list. > > If you have any questions or concerns about the running of this list, or if > you feel that a member's post is inappropriate, please contact the owners or > moderators directly rather than posting on the list itself. > > Your V iPhone list moderator is Mark Taylor. 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