Actually Richard on your 13 Pro which has an OLED screen, screen brightness should have no or little effect since there is no backlighting. Turning on the screen curtain on a phone with POLED screen simply means that all pixels turn black whereas on a phone with LCD screen which requires backlighting so you can read it in bright light turning on the screen curtain turns the backlighting way down and this will in fact make more of a difference. I think I read once that there are certain colours which take less energy on OLED screens so really your screen should not be black but whatever colour it is which requires the least amount of energy. I'm just saying that this is the technology explanation. I still have an iPhone 11 which according to Apple has the most advanced LCD screen ever used, but of course it still requires backlighting and while I do often have screen curtain on I must say I don't actually notice that much of a difference with battery. If you do than I don't want to argue, but I honestly can't see how you might get even 15 or 20 minutes more battery life with screen curtain turned on on an OLED screen phone.
One thing I have noticed is that Voiceover itself seems to take up quite a lot of battery. We went for a walk with friends the other day and both my wife and I as well as my friend have the Apple Watch with Cellular connectivity and with cellular also enabled and turned on. I realized that when we left that I only had 22% of battery remaining and I started the outdoor walk workout. My friend had 21% remaining and also started the outdoor walk workout. We were out for a bit over an hour and my watch died after about 1 hour, my friend still had 10% battery remaining on his watch when we came home and I thought this was pretty significant. I also always notice when we travel how my wife who has an iPhone 11 Pro always seems to have a lot more battery left than me with my iPhone 11, both phones are the same age and she also uses her phone a lot and in fact a lot more with the screen on whereas I would let's say listen to a book with the screen turned off and only sometimes do something else and I am convinced it is because I have Voiceover running and she doesn't or my friend didn't on his Apple Watch. From: viphone@googlegroups.com <viphone@googlegroups.com> On Behalf Of Richard Turner Sent: Sunday, August 28, 2022 12:29 PM To: viphone@googlegroups.com Subject: RE: iPhone question. Screen brightness only impacts what someone sees on your physical phone, it doesn’t have any impact on anything you send. I know Apple and others do not agree with me, but I simply set screen brightness to auto, turn on the screen curtain, which means the brightness will be at 0 very shortly. Then, if someone sighted needs to see my phone, I either toggle the screen curtain off, or toggle VoiceOver off and the screen brightness adjusts to the room lighting so they can see it fine. I do this all the time with my wife so she can see my screen when needed. And, charging once a day is normal. I have the 13 Pro and get a full day’s use on a charge and I use it a lot. IF I forget to turn on the screen curtain, I notice a definite drop in battery life. Logic says, if the screen brightness takes more juice, doing what I do uses less juice, the same as manually lower the screen brightness. Richard “People demand freedom of speech as a compensation for the freedom of thought which they seldom use.” - Søren Kierkegaard My web site: https://www.turner42.com<https://www.turner42.com/> 🦅 From: viphone@googlegroups.com <viphone@googlegroups.com> On Behalf Of Jenny Bomareto Sent: Sunday, August 28, 2022 9:45 AM To: viphone@googlegroups.com Subject: iPhone question. Hello, I’ve been having to charge the battery quite a bit on my phone usually every day but then I’m usually playing with it all day long so that’s my maybe another reason. Anyways. I currently have the screen brightness set to zero however it was set at 33% also currently it’s set to dark so how should that be set? Also if I send a text or an email with like say an attachment that a visual person has to read while they be able to read it with my phone screen set at 0% and if you guys think I should still leave dark turned on? And how about a text message as well with pictures or text? Thanks for reading regarding this matter. Jenny Bomareto 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. 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