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it's no secret that pretty much every phone on the market is gonna thermal

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throttle eventually if you run something intensive on it for long enough so

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whether it's a video editing program or a graphically intensive game your

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performance is gonna start right around here and it's going to end up

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somewhere right around here but

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what we don't know is how does that difference in performance

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between a peak and a sustained state get

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impacted by installing a phone case because here's the thing

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most cases on the market are designed for

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ruggedness or looks or cost-effectiveness and i haven't seen

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any that i can think of that appear to be designed for thermal conduction so

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are we all just taking our mobile devices and installing a great big

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insulator on it and how much of an impact does that have

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we're gonna find out

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before we can determine how much a case affects thermal throttling we need to

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set a baseline for how our devices thermal throttle without any case

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installed at all now in the interest of fairness we're going to be testing both

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camps so representing Android we've got the galaxy s10 plus and representing the

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iphone we've got the iphone 10s max

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which side do you want to play for today

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team iphone team Android team iphone i'm doing it so we're going to use geekbench

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and we're going to do subsequent runs just like i did in my phone water

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cooling video a couple years ago to see how our performance tracks over time

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three two one go yeah you have a percentage bar no i just

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have a timer yeah all right

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i've got my first score much lower than mine fifth run for the iphone is 11 318.

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uh what was the galaxy and the samsung is 10935 so that's it 10 runs and we've

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got kind of some bad news like my phone's definitely hot yeah so is this

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one all along the back is really warm to the hand but i'm getting the exact same

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scores that i was at the beginning almost to the point same with the iphone so

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obviously they're not thermal throttling i messaged my buddy ian from anontech he

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said one of the ways that they get phones to thermal throttle is they run a

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battery test for an extended period of time like 10 15 20 minutes okay and then

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they run the test instead of just running the test manually over and over

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again we did 10 tests do you think that was enough or should we have done 20 or

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25 i don't know let's try his way okay and see what happens so let's start the

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geekbench battery benchmark i'm going to crank up my screen brightness because

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that affects your thermals as well and go okay so it's been over 20 minutes now

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they're already super hot so now let's run the CPU test for 10 iterations we've

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got a problem even after preheating it

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and then running our 10 benchmarks in a row again we're still ending up with all

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of our scores within margin of error

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okay so one of the things i've heard is that Android handset manufacturers will

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purposely tune their devices to check what software is being run and if it's a

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benchmark program it'll actually allow the phone to heat up more than it

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normally would before thermal throttling the processor

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so one of the ways that you can mitigate that is to use a program called an apk

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extractor grab the apk the install file for the

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app off the phone rename it to something else then put it back on so if you

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change the name of the program it won't be on their white list anymore some of

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them will will behave that way the problem though is that that doesn't help

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us with the iphone no because we can't sideload stuff on an iphone and there's

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not that many tests for this kind of stuff in the app store like they have

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antutu but i've run it six times now there's no change fortunately there's

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still 3d mark last chance this has to work so how are we going to run this one

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on the iphone it's a little different than Android i'm going to use slingshot

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extreme unlimited which pretends that there's no such thing as vsync and lets

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it just run as fast as it can off screen and then i'm gonna use slingshot extreme

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unlimited open gles 3.1 as my option

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here and then i'm going to go ahead and run okay so what do we want to do 10

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runs here better make it 12. odd choice

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you just never know what's going to happen

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i don't trust it okay so i got my first baseline score

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four five two three uh second test is about to finish four

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three zero zero wow that's lower yep

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dropped again 34.79 oh this time it went

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higher back to being lower 33.50 dropping even more 31.48 slightly higher

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3210 lower again 3115. final round

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lowest score yet 30-78 a clear trend so

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we had that one outlier where it kind of spiked back up but then other than that

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this is going to be really easy to map against yeah 6006 i'm down a little bit

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this one's actually back up again 60 53 59 44. wait what

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44.95 that's it baby we just dropped 25

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we're throttling it now i think it's not gonna go back up like

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feel that that's hot like it's really hot i just don't know if it's going to

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keep going down further so it could either be like up here and then crash

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and like just kind of two tears or it could crash and then

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keep going down like sloping yeah 45 29

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44 73 45 38 final test 44.97 we know what

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we're looking for with the iphone we're looking for either a faster decay so a

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steeper curve yeah or a slower decay if maybe the case aids in cooling or it

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falls farther if it gets hotter than it ever did and performs worse than it ever

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did and then with the s10 plus we're looking for whether it will hold for as

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many runs or fewer runs or more runs before it throttles down and maybe drops

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farther than ever or maybe drops further okay so uh do the shopping mall

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charge it

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i do not belong in here should we try one of these leather

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wallet ones that looks like that traps heat big time

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10s max leather case oops

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got the leather case this thing is 70 canadian dollars after tax that's crazy

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hey buddy i'm looking for cases for samsung galaxy s10 plus and iphone 10s

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max normal

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silicone little beefier

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galaxy iphone kind of comparable

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what do you got okay so i got a selection for you i tried to go from the

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most basic case you could have wow that's a really basic case yeah you paid

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more for that than you'd like to know so that's for the iphone and then that's

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for the samsung so we're seeing if that maybe insulates it more yeah so then one

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level up from that is semi-rugged sure like that one oh my god look at that

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what is up with that did they just put it on a little stand to spray paint it

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and then i got you some wallet cases okay and then i got you the actual

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official leather case from the apple store you don't want to know

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70 us dollars not u.s they're canadian

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appalling can we return this so let's start with the most basic cases

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oh this thing sucks look at it it's like jiggly in there this is basic by like

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every definition and go so we're finished our 12 runs for

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our Android device we ended up with basically exactly the same behavior we

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throttled at the same run and down to the same amount so as far as we can tell

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putting a really sort of basic plastic case on your phone is not

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going to have any noticeable impact pretty much the same story with the

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iphone as well except there's a bit of problems with 3dmark on

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this one it crashed around test two so

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we couldn't just pretend that test three counted as test

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two right because it's actually run for more time now it is getting it hotter so

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we did an extra test test 13 but even with all that it's pretty much the same

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results as no case the trend line is still very similar so i it's hard to

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draw a conclusion yet shall we move on to the rugged case yes all right let's

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do it yeah this is exactly the same that

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surprises me actually i me too i would have thought as we go into thicker cases

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i mean they're made out of things that are not known to be excellent heat

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conductors i guess these aren't the most rugged cases this isn't an otterbox or

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anything but it's like a lot more substantial than this but i guess it doesn't make a difference all right

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wallet case time and it's the same okay

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do you want to try running them with the cases closed

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yes now that's interesting

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so on the iphone we not only throttle

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immediately and harder we actually end up at a significantly

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lower steady state so it looks like the iphone 10s max

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actually relies in a very significant way

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on its screen for cooling which makes me wonder then why didn't covering the back

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matter okay so i'm done

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there's still the apple branded leather case the 70

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leather case all right all right do you have any theories like you're a motorcyclist you wear leather so there's

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no wind going through i wouldn't say that my experience with leather is that

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it feels more insulated than plastic though so okay so

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we're done with the leather case that's it actually kind of beat the base better than a bare phone i mean barely

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it's probably just margin of error i guess but it's definitely not worse it's

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not worse definitely not worse so unfortunately this video didn't end up

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being the make your phone run faster with this easy trick conclusion that we

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had maybe hoped for so what we found from all of our testing

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is that phone's thermal throttle absolutely it's dependent on the

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workload and unless you're going out of your way to do something particularly

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stupid like and close your phone in a

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non-breathable insulating material

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it's probably not going to have a huge impact on the performance of your device

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this is a good answer Linus that means we can have our performance and

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protection too this is the world we want to live in so this is like the ultra

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thin animal skin condom i only use recycled condoms inside joke from the

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roast go watch it

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so thanks for watching guys if you disliked this video you can hit that

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button but if you liked it hit like get subscribed or maybe consider checking

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out where to buy the stuff we featured at the link in the video description to be clear we're not recommending that

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mall kiosk but uh you know if this is really hard to get

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this out it's a tight fit maybe we recommend the apple genuine

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leather case i'm not sure about that one either also down there is our merch

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store which has cool shirts like that one and our community forum which you

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guys should totally join we have shirts kind of like this one but we don't have

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a long sleeve yet we're working on that i want that oh there it is