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iPhone 15 Pro facts and estimates

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Re: iPhone 15 Pro facts and estimates

#71

Post by huijzer »

mkroman wrote: post #66

One thing I haven't seen discussed is the thermal properties of this expected Ti-6Al-4V alloy. According to these specs, the alloys thermal conductivity is 6.7 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=m... Whereas 6063-T6 aluminium has a thermal conductivity of 200 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=M... Even if the alloy in the iPhone is a bit more of an exotic…

Good point! Maybe that explains why they chose it only for the bands. People touch the phone the most at the outsides, so this sounds like a great trade-off between allowing the phone to cool itself (via the aluminum back) while not being hot or cold to the touch when holding it.

Re: iPhone 15 Pro facts and estimates

#72

Post by throwaway_ab »

Saving 20 grams of stationary mass is equal to saving possibly 200 grams in quick movement, such as taking the phone out of a pocket quickly. This is going to be quite noticeable. Add in to this the authors calculations of rotational inertia savings of 15% the effect might be even more pronounced.

So when moving the phone from pocket to quickly see a message or phone call, those savings reduce the weight of the phone during this motion by almost the weight of the phone itself.

Definitely noticeable.

-----

A few years ago I tried to work out the stationary weight limit of my roof rack on my 4wd, for example if I wanted to mount a rooftop tent with two adults (I'm overweight at the moment) and wanted to know if my size was an issue. Assuming a stationary weight of tent and other stuff and me and my partner I pushed my estimate to 400kg.

The roof rack is rated at 100kg carrying capacity.

What does 100kg equal to when going up and down sand dunes?

I found a forum post where someone worked out with calculus the "weight" that 100kg turns into 700kg - 800kg whilst off-roading aggressively, the roof rack experiences almost 80% of a ton due to the acceleration/deceleration pressing into and away from the car in a vertical diagonal motion.

With that I could rest easy knowing I'll never approach those numbers whilst the vehicle is stationary.

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I figure that quick motion moving the phone from pocket to in front of your face involves similar forces. Intuitively this checks out. Hold your phone in front of your face. Now move quickly side to side. Your phone is easily exerting 1kg of force as you wave it around.

That 20 grams saving will make a huge difference.

Re: iPhone 15 Pro facts and estimates

#73

Post by sidkshatriya »

FieryTransition wrote: post #64
sidkshatriya wrote: post #47

Earlier quoted context omitted.

> My daily driver weights nearly half a kilogram and has a 13,200 mAh battery that literally actually truly lasts for four days of mixed use on a charge. > I also have an iPhone, but be fucked if I can keep hold of it, it's so light I can seem to actually get a grip on it for longer than about two minutes at a time. Your half-kg phone has trained your motor neurons in such a way that they are not prepared when you ho…

Mixed interval training for phone holding, I sincerely hope that was a joke, but judging by the last paragraph, I'm not sure :-D

Mixed interval training for phone holding was indeed meant as a joke. Means “use both phones regularly” and you’ll get used to holding them both competently.

Re: iPhone 15 Pro facts and estimates

#74

Post by indemnity »

oefrha wrote: post #12
Gigachad wrote: post #6

Earlier quoted context omitted.

I used to do this, but then I realised I only ever drop my phone because it has a case on it. Now I have it bare and never drop it.

Not in my case. I never ever used a case since iPhone 4. Then I dropped my slippery XS Max two months in, cracked the back glass, and “repair” cost like 70% of a new phone. So it’s been living in the silicone case since, it’s no longer slippery and I don’t see the crack.

I guess the XS Max would be well outside of AppleCare+ territory, but for those of us who upgrade every 2-3 years, AppleCare+ is great.

It's literally insurance for your phone except you don't have to deal with the insurer.

I've only used the Express Replacement Service part of it twice, but when I've used it, it's been like magic. I get a brand new (refurb probably, but who can tell) phone within 2 days, and then I send back the old one.

No questions asked, no weeks of wrangling with the insurer.

Re: iPhone 15 Pro facts and estimates

#75

Post by indemnity »

mkroman wrote: post #66

One thing I haven't seen discussed is the thermal properties of this expected Ti-6Al-4V alloy. According to these specs, the alloys thermal conductivity is 6.7 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=m... Whereas 6063-T6 aluminium has a thermal conductivity of 200 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=M... Even if the alloy in the iPhone is a bit more of an exotic…

Well, the predecessor is stainless steel, which I imagine is closer to the Ti number, and in my experience with 12/13 Pro it's always the back that throws off heat, not the frame.

Anyhow, just the frame is this material, inside its Al.

Re: iPhone 15 Pro facts and estimates

#76

Post by oefrha »

indemnity wrote: post #74
oefrha wrote: post #12

Earlier quoted context omitted.

Not in my case. I never ever used a case since iPhone 4. Then I dropped my slippery XS Max two months in, cracked the back glass, and “repair” cost like 70% of a new phone. So it’s been living in the silicone case since, it’s no longer slippery and I don’t see the crack.

I guess the XS Max would be well outside of AppleCare+ territory, but for those of us who upgrade every 2-3 years, AppleCare+ is great. It's literally insurance for your phone except you don't have to deal with the insurer. I've only used the Express Replacement Service part of it twice, but when I've used it, it's been like magic. I get a brand new (refurb probably, but who can tell) phone within 2 days, and then I…

Yeah, now I get AppleCare+ (or whatever tier that covers accidental damage as well) on everything since the 50%-70% “repair” (i.e. replacement) cost on the slightest damage is insane. It seems you can now pay to extend the coverage indefinitely after the standard period, according to an Apple Store employee when I got a new iPad Pro recently.

Re: iPhone 15 Pro facts and estimates

#77

Post by drcongo »

FieryTransition wrote: post #62
drcongo wrote: post #60

The most salient part of the entire article for me is this line: "[...] it’s also used in medical implants, so you know that skin contact won’t be a problem." - if I hold my iPhone 12 Pro for too long I get blisters on my palm.

You might be allergic, I would get that tested, but it's nothing to worry about, just nice to know. AFAIK most people shouldn't react badly to prolonged skin contact with aluminum in the range that is holding a phone.

I am - I have an extremely sensitive nickel allergy. The iPhone 12 Pro is a stainless steel body but I think with such a low nickel content that it could be classed as surgical grade, it takes holding for a long time for it to cause blisters. Coins on the other hand (no pun intended) can cause my skin to start bubbling like a burn in no time at all. As far as I'm aware, titanium is almost never mixed with nickel, it's my favourite metal.

Re: iPhone 15 Pro facts and estimates

#78

Post by layer8 »

oefrha wrote: post #12
Gigachad wrote: post #6

Earlier quoted context omitted.

I used to do this, but then I realised I only ever drop my phone because it has a case on it. Now I have it bare and never drop it.

Not in my case. I never ever used a case since iPhone 4. Then I dropped my slippery XS Max two months in, cracked the back glass, and “repair” cost like 70% of a new phone. So it’s been living in the silicone case since, it’s no longer slippery and I don’t see the crack.

Starting with the iPhone 6, iPhones became slippery due to the rounded sides. This stopped with the iPhone 12, with the return to flat sides. Except for a short stint with the iPhone 6, I skipped the whole rounded-sides era, and never used a case.

Re: iPhone 15 Pro facts and estimates

#79

Post by layer8 »

mkroman wrote: post #66

One thing I haven't seen discussed is the thermal properties of this expected Ti-6Al-4V alloy. According to these specs, the alloys thermal conductivity is 6.7 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=m... Whereas 6063-T6 aluminium has a thermal conductivity of 200 W/m-K: https://asm.matweb.com/search/SpecificMaterial.asp?bassnum=M... Even if the alloy in the iPhone is a bit more of an exotic…

Probably a little, but the titanium is only the outer side bands. Most of the heat dissipation happens from the front and back of the phone.

And Ti-6Al-4V is not an exotic blend, it’s a standard alloy.

Re: iPhone 15 Pro facts and estimates

#80

Post by ecnahc515 »

drcongo wrote: post #77
FieryTransition wrote: post #62

Earlier quoted context omitted.

You might be allergic, I would get that tested, but it's nothing to worry about, just nice to know. AFAIK most people shouldn't react badly to prolonged skin contact with aluminum in the range that is holding a phone.

I am - I have an extremely sensitive nickel allergy. The iPhone 12 Pro is a stainless steel body but I think with such a low nickel content that it could be classed as surgical grade, it takes holding for a long time for it to cause blisters. Coins on the other hand (no pun intended) can cause my skin to start bubbling like a burn in no time at all. As far as I'm aware, titanium is almost never mixed with nickel, it'…

Wow that's truly unfortunate. I hope one day health science can solve that problem for you.

Have you travelled to Europe where there's a lot more usage of coins (eg euros/franc)? Do you just have to wear gloves?

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