Is YOUR Smartphone case causing overheating? 

Watching too much mrwhosetheboss videos is heating my phone up😂

Your Video quality makes my Phone too hot.

My hypothesis The skin makes the phone slightly hotter because vinyl has a lower thermal conductivity (about 20% lower) than air. The TPU case does not make much difference in temps because TPU has a similar thermal conductivity to air. The enclosure makes the phone slightly cooler because of the large metal contacting the table to act similarly to a heatsink. It would be interesting to see this experiment repeated on a different surface or with the phone suspended.

Wow! I didnt really think about that! Thanks for getting rid of my anxiety for my phone in a double layered case!

Does Your Phone cause your case to heat? Even this is true...lol

Arun not getting sponsored by Dbrand and he is finally getting revenge, lol

There might be some cpu throttling involved as well, which will prevent the phone from getting too hot. It would be quite interesting to see how a case affects cpu performance over time...

One thing there: On the full enclosure style case, you specifically tested a Love Mei. They're the most expensive for a reason, haha. It's built as a heat sink. All that external exposed aluminum is specifically designed to cool the phone. Personal experience there in the past with an LG G4 - an Otterbox case would overheat it to the point of critical cooldown mode if I tried to use it while charging, whereas the Love Mei case I replaced it with later merely got a bit warm in my hand. Now one thing specific to the LG G4 is that the back case cover is not plastic, but rather aluminum, to serve as a heat dissipation area. You even showed that on your FLIR shot, as the heat sink aluminum part was hotter, because it was doing it's job. So... I'd not rule out the fully enclosed cases from being warmer just yet, simply because you bought a really good one, rather than the more commonly purchased all-plastic-and-rubber ones, such as the very popular Otterbox cases. (Man I miss the old fully waterproof ones they made, haha.)

Please I'm tired of saying this all-time Your voice should be an option for Google assistant Arun.

After a lot of consideration, I chose a metal bumper case,but it only protects the sides of my phone. I learned that any case is perfect.

NO WAY, you actually considered my comment on your overheating video to keep the phone plugged in from 0%!?!!😍😍 AWESOME !

No one: Absolutely no one: Americans: fAHreNhEiT

I think u should do the test with a glass or metal body phones as they react differently to heat (also not many people have a ceramic back phone).

Bring more videos using S10 5g bro! Some sort the customization videos that you were doing earlier!

love your vids do some best android/ios upcoming games..😁

Great finding! I always remove the case of my phone everytime I charge it. It's the clear plastic case kind. I don't know, I'm just paranoid over phones heating up with a case during charging

I've been waiting for this heat test involving case for years. Thank God Mr Whosetheboss made this video. Thank you so much man. Your channel rocks!

Arun: Dbrand: ... Arun: "stickers mak..." Dbrand: "no more sponsor"

So your saying the bigger case acts like heat sink. Thats a pretty cool test! Great video man I love tech lessons like this.

This is probably the most straight-to-the-point video on youtube.! Love it!!

Quite an interesting finding. Sometimes when using my phone while charging and felt it get warmer, I've removed the case to aide with cooling. I guess maybe it wasn't really all that necessary. Or like I've seen in lots of phones torn down by JerryRigEverything, the heatsink is facing the display instead so the rear doesn't matter all that much.

ohh.. i just saw your finger, you have zinc defficiency. work on it,, keep up your health

Try cases with WiFi speed, since manufactures have gone from plastic backs to glass backs to improve WiFi speed and most of us decide to put a case on our phones anyway. I would love this video idea, I always thought my phone gets hotter because of the case.

The enclosure has a piece of plastic that may have a lower temp on the outside than the true screen temp, but the case feeling hot is a really GOOD sign that it's helping because that means the heat is getting out to where you can feel it. Definitely not what I expected. All case makers should be testing this and routing this benefit if it exists for their design.

You should measure throttling as the phone could be cutting back performance to keep the temprature down

You should have included a flip cover or a leather case as well. They are pretty common.

The double stress test is just pushing the phone to the control limits. The CPU is throttled based on temperature, the charge rate is manipulated to keep temperatures under control. That's why there's not a big difference.

The thumbnail is Absolutely Amazing!!!

That Samsung Galaxy S10 is just so beautiful especially that prism white colour. Can't wait to switch to the S10 from my iphone 7 plus. This was a HOT test. 🥵🥵 Oh ok I will leave now....

I think Spotify is a good battery wasting application standalone 😂

I actually really appreciate this video. I don't there's a test just like this out there. I was always wondering how cases effect my phone heating up especially now that I have a phone that runs QHD and 90hz

Arun, air is an insulator. Almost every denser material will allow heat to spread. So an air layer will work as an insulator, not a help to get rid of. For this case, you need an air flow. The more dense and cold mass you pack next to your phone, the less your phone will heat up. In case this mass is pre heated by sun or simply wearing in in your pocket, the harder it is for the heat to "creap into" the mass.

For case I choose middle thick and black color. Middle thick to keep balancing heat and protection and black color to release the heat to case quicker.

Definitely not what I would have expected. I'll keep my case on when charging from now on 👍😀

I've had this question in mind for a while. Thank you boss❤

It's likely that the battery controller is limiting the charging current to prevent overtemp. So regardless of how insulated the phone is, the temperature won't rise; the charging time will just suffer slightly. An additional test using a known insulator (eg. foamboard, wool) would establish whether or not this is the case. In general, it's good practice to validate your results with both positive and negative controls.

Appreciating your hardwork you open the mystery that the case don't heat much the phone.

I have been waiting so long for your vedios😍😍

Putting a phone flat on the surface is one way to go, but i am sure the results will vary if u hold it up for example. Usually phone heats up while gaming and it matters a lot, because thermal throttling to me is a big issue.

Amazing bro..what app is use for phone side pressure gestures..

Some guy over on reddit recommended this video saying 'phone cases dont cause more heating'. The problem witg this test is that phones have a set temperature for throttling. Thats why the temp is always the same here. Should have used something like cpu throttling app to show performance degradation over time.

Was not expecting those results. Very interesting. Thank you for doing these tests

You really worked hard on that, good job aran 👍🏻

So finally someone made a video about this. Glad it was you who did it!! Thanks!!

*What about phone signal* 🤔 Is it compromised with thinker cases?

Phone heating is a common issue and it's good to see you cover this area. Appreciate it.

Using sticker rise the temp DBrand Skin : Left

Don't phones throttle performance especially under heavy load like this situation. And wouldn't it then throttle down to the same upper limit temp? Seems like you should get better performance from any cooling effect provided rather than actual better temps because of the adaptive cpu voltage. Better cooling would allow the phone to up the cpu voltage and increase performance but that would bring the temp back up. Is there a chance the thickness of the cases is preventing an accurate internal thermal measurement or is that not how it works? Could there be something else at work here?

Aaron -- I've always wondered why someone hasn't created a case that has a grid of tiny holes on the back for ventilation? I get some want water protection, but personally I just want drop protection and additional ventilation only make sense to me.

_How is your voice not an option for Google Assistant._

Quite possible that the phone is thermal throttling to keep it at a comfortable holding temperature.

What about cooling cases? There is only one called "Nanocase" for the iPhone. Would you mind reviewing that?

I'm still rocking a marble dbrand skin for this summer because my phone is black and black gets pretty hot in the sun but a pretty white marble design stays cool. I miss phones like the silver/mirror Sony Xperia XZ premium.

just loving these kinda videos lately. you have been smashing it. i have never been any more excited to watch a video...

Lol. When the notification is 1 hour late 🤣🤣

One of the best phone videos I've seen. Very informative. Certainly answered my questions about cases.

THE S10 HAS A GLASS BACK. TEST IT WITH A PHONE WITH A METAL BACK.

i personally am running the samsung galaxy s9 with the samsung led case, but because i am rarely doing anything taxing on my phone, i have no games installed and the most tasking thing i do to it is either charging it or updating apps. this results in the phone rarely even feeling slightly hot and my end of a normal day battery level is usually around 40% but when i'm not working and listening to musik most of the day does the end of the day battery level rise to 75% from a full charge in the morning. but when i do something taxing is it always on my computer and not on my phone so it is spared from some of the hardest tasks which i would imagine would increase the life of the phone.

Plz make a video on how phone coolers change the temperature of your phone, do they help at all ???

Is YOUR Smartphone case causing overheating? Before video: DEFINETLY After video: "Uhh... mmm... maybe not..."

Thank you, milllions of videos and no-one addresses this issue. Most phones get cooked in the summer.

what about a shell around the edges of the phone and not the back?

Dbrand has just left the chat and will never sponsor this channel 😂

Probably a thermal threshold the phone tries to stay at. The temperature differences are insignificant and largely irrelevant without knowing if the phone is trying to force itself to stay at that temperature by throttling.

Hi Arun, how about your personal preference? Do you use a case, skin, or none at all? And why?

Can you test reception difference next? I have a feeling that not only would the signal be worse, but the phone would work harder with all the dropped packets.

So glad you made this video. I’m using a chunky spigen case on my note 9 and this has been playing on my mind a lot.

Whether slimmer case or thick case Phones gets heat up Especially in summer And heating seriously affects battery life to a very high extent

Definitely not what I expected. Very interesting.

Great video and I was waiting for it since you did the overheating comparison. Something to note that when the phone is held in your hand this would help to dissipate the heat even more

It's the metal. As a conductor, it absorbs heat easy but it also dissipate it much faster. I bet you if you had the phone upside down the cooling effect on a metal csse is even quicker.

I know devices will also "charge throttle", which means just like an SOC's CPU & GPU, the phones charge controller will throttle down the rate of charge (current) when a given range of thermal headrooms are hit & this "charge throttleing" could be a reason why simply looking at thermals alone could be deceptive.

Fantastic vid I love how you do things that are outside the box yet what people really want thank you 100 thumbs up great job.

Do another for phone signal please.

New Boss video: *Ah that´s hot, that´s hot*

You're voice makes my speakers hot

This was an awesome test and I really appreciate you doing the work and effort to answer this question that many of us had because I had sworn that my TPU fit case from 21 tech what's causing my phone to run a lot hotter than it would without

In the last case you are measuring the temperature of the protective screen that comes with the case and not the phone, it would be slightly better if you took the screen part off and then measured the phone temperature but maybe it's lower still because the battery temp remains low.

What I need is a case with dual fans for long playing

What about a hard case? (If it is possible, use one made by Nillkin) It doesn't seem to let the heat out of the back, but sides aren't covered

Would have liked to see a wallet case that covers the screen because a fair amount of people seem to use and from my experience it seems to affect temperature, but that is only anecdotal.

This channel has no intro and i am impressed with that

I always remove my silicon case and keep it screen down while charging. Feels cooler, I'll test the temps with and without case.

wow.. nice tests.. however, i suggest you should have shown test without any case at all as well.

Not really. When the phone is getting too hot, the phone will throttle the CPU and reduce the charging speed. For example, Samsung phones charging at 10W when screen is on (5V 2A), but increase it to 15W (9V 1.67A) when screen is off.

thank you! this is really informative! props for all your hardwork and quality content

The problem for the test is the back of the phone placed on surface, whether case or caseless don't make much different

Did you do these tests at least 3 times each? because 1 degree difference is nothing. that could be caused by your body in the room over a period of time. As for the thicker heavier cases causing the heat to drop makes perfect sense. The case acts as a heat sink. If you are more interested in this type of thing, I would recommend taking some classes about thermal dynamics. Very interesting stuff.

_Dbrand has left the chat_

Rather a useful video. I've always been confused about whether to charge my phone with the case on or not. Cheers mate!

If it’s too hot it will throttle the charge speed and cpu. So the temp is the same. But the phone is slower. So depending on case or not it will have always around the same temp on full load but will slow it self down sooner or later

1:12 ughhh, my OCD gosh darnit

Mate, truly innovating with these video ideas

wow. really puts me back to Heat Transfer course... surface area and materials... good one!

Wow cool video, thanks for posting.

I've been wondering about the same thing. Thanks for clearing things up. You the best ✌️

Curious about the Apple genuine cases

Hah not only did it overheat but the battery case blew up which got one lawsuit to the company! I wasnt even hurt but i acted like i was

You didn't let it reach equilibrium. You just tested the thermal capacity of the cases (until they reach the same temperature as the phone they'll just absorb heat leading to these results)

awesome! tyvm. now i can always have my case on :)