Dangerous USB chargers 16
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- Опубликовано: 19 сен 2024
- Examining a pair of fake "fast" USB phone chargers. They don't comply with safety regulations, they can cause an electric shock or electromagnetic interference (EMI). The fast charging function (9V, 12V) is non-existent, in reality they can only supply 5V. One has a fake built-in voltmeter.
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The fake volt meter is truly astonishing. The length some of these Chinese manufacturers go through to scam people is almost admirable, if not baffling.
You should see tablets installed with fake hwinfo to display their 'totally real 4gb'
i have seen same volt meter in desktop multiport charger it even have 9v and 12v but the voltage is not accurate the chip dont have any adc its relying on the qc to know the voltage
@@RonnieMcNutt666 the dialer app have a secreat code that you can call out the editor and change it
i always wanted one of those rom
Works as gimmick for poor folk who have no idea.
@@KrotowX if you can fall for it then probably you dont care anyways
The fake voltmeter is surprisingly accurate, and the lack of voltage switching is an intentional feature to prevent you from baking whatever is connected to the other ports 😂
It's not a voltmeter, it's just a 5V port indicator, glowing text for port marking
@@makoveliprod I know but the voltage is almost always between 5.2 and 5.3 volts anyway. It’s a joke of course. It does kind of crudely visualize the voltage with its brightness value, though, but if you want more accuracy than ±2 volts, you need a voltmeter.
@@makoveliprod I would have agreed with you if they had not made it say 5.2V exactly and make it look like it's a 3 digit display with a current option.
The thing is a simplest form of preset value display. 3 decades ago we had similar clock rate indicators in PC cases. Those at least came with value setting jumpers.
@@KrotowX I think those were supposed to be installed in PCs with TURBO buttons: those were used to switch between the newer CPU’s max clock rate and a compatibility mode with the IBM XT (4.77 MHz). You were supposed to connect the display’s pin header to the TURBO button or a connector on the motherboard; of course it didn’t actually count the clock cycles. Originally, a row of LEDs (🟤4.77 🟤8.0 🟡16.0) was supposed to be connected to the MoBo but manufacturers found 7-segment displays more futuristic, though they kept them compatible with the one-of-n coding of the LED signals. Anyway, I think they just used a two-digit non-multiplexed display and a simple IC with an array of diodes from each input to the corresponding segments.
Man, fake tweeters already drive me nuts, that fake voltmeter is something else! Keep these awful power supplies coming, this never gets old!
A fake voltmeter? I'd like to say I've seen everything now, but I'm sure there's worse to come.
i guess you didn't saw "4 TB" USB drives from Aliexpress 😁
I once was in a public electronics school, and they gave us the colorful fake iPhone charger to power a diy project...
When I reported how dangerous it was not only did the teachers just not understand how a flyback power supply works at all, which is pretty worrying given the fact that this very school delivers a certificate which then allows you to work as a professional electronics engineer, but also they told me to stop saying such things because it got the whole class scared.
So I thought maybe I had made a mistake, and these chargers were actually safe, so I opened one up to see for myself.
No isolation distance
no fuse or filters
terrible transformer isolation
1KV capacitor
no chip in the primary side
good job
Where are you from? 😬
to all studends: If you have a good teacher just discuss this video in class. If you have an other teacher make a video on your own youtube channel.
@@ijapsdjhkahbefajldas Switzerland.
I watch DiodeGoneWild since a long time and have followed the entire dangerous phone chargers series. He's always been an inspiration for me and that's where I learned basically all I know about power supplies, now I can even make my own and fix ATX power supplies.
@@MartinMeise lol I think there are better examples on DiodeGoneWild's channel, this wouldn't be THE video to discuss
Did they finally accept your report?
"Cauton Far tndoar ueo only." It looks like they copied a low resolution image of the genuine version then opened it in bad optical character recognition software and couldn't be bothered to correct it.
That fake voltmeter totally cracked me up. Damn😆
Completely wasn't expecting that with the fake voltmeter. I was just thinking what a cute and useful module to put in something else, and then... 😵💫
I have disassembled some of these dodgy chargers myself and I found out that some of these that have the voltage display actually have a proper voltage and current detection circuit with shunt resistor. I even adapted it to use with my bench power supply in order to read how much current the phones were getting
I'll NEVER get tired of this series! It's so hilariously informative! Keep up the great content!
Greetings from Brazil
Your accent. It’s the most unique I have ever heard.
Loving this series, and love seing it get more and more interesting with all the new equipment
I remember when you would just load them with some power resistors, now we get a very nice look at the currents, voltages and even temperatures with the thermal camera! Very interesting to see, thank you for making these!
Oh man I miss the "too hot to touch" thermometer.
I might have rated the second one as super dodgy because of the isolation distance on the board, having ICs that are baking themselves, and more importantly, because there are two capacitors that are touching each other, with each connected to a different side of the board!
these videos never cease to amaze me, because as technology and mobile electronics evolves, the chargers also evolve, so does the dodgy chargers in order to chase the market
Interesting to see that they're actually getting better visually. if not technically. Looks like they learned about isolation distances on the PCB, the slot in the second one is surprising. I remember when the super dodgy rating used to be for the ones with
5:22, no, it's for spark gap function 😂
It would spark inside the transformer way before this ;)
Has an easy way to open this plastic glued covers... use banana oil (sold here as nail polish remover), spread over the junction, wait 10~15 minutes and hit with a screwdriver handle to open, work very well
Hahahah i love that "5.2 volt meter" more then i would have imagined 😂 what a effort to spend a few cents extra to hadrwire a display to ALWAYS display 5.2 volts, also that they used a chip between the data pins instead of cheap resistors is also a lot of effort they put into a scammy product and using the capacitor pins pointing towards each other creates a nice spark gap, and that isolation melting is just hilarious but also dangerous
I would like to see an oscilloscope waveforms of that chips pins. Or an autopsy of it. Doubt it's that chip at all in terms of communication with the device. It might be just a pair of resistors inside.
During early 90s, 386, 486 assembled PC cabinets had 7 segment display on front panel indicating operating frequency. One could configure its jumpers to display CPU clock frequency, anything from 00 to 99 MHz. Assemblers used to scam gullible customers by giving lower clicked CPU but with the display indicating higher frequency
Another excelent engineering example. Those videos will never get boring hah
Glad you like them! Thanks for your support ;).
@@DiodeGoneWildthis is not the real Qualcomm chargers. I bought one and one day when I charged my Redmi 9, it tripped and judging by the smell, one of the USB was fried, I threw it in the trash and stick with the original Redmi charger instead
Vďaka za takéto videá, ktoré ukazujú skutočnú "kvalitu" niektorých čínskych noname výrobcov. Ten voltmeter tiež pobavil.
6:27 it's not just a fake voltmeter... It's even a damn fake 7-seg display... 😂😂😂🤣🤣🤣
Awesome thermal cam recordings! Couldn't wait to see the thermal readings of these dodgy chargers ever since you got the cam :)
0:30 - I received the US version of the same charger with a used cell phone purchased off Amazon. It appeared to be unused (seller probably got this crap for free, tossed it in with the phone and kept the genuine LG charger for himself) and it is STILL unused. Looks like I made the right choice!
12:18 - 92°C is just shy of 200°F... That's some SERIOUS heat!
Just use Anker or Samsung charger.
Wow: lacquer and capacitor paint as the thinnest layer in the isolation. I do so appreciate these destructive teardowns. Name and shame the brands and sellers.
Electrolytic capacitors are covered in heat-shrunk plastic, not paint. So the capacitors touching each other is actually more similar to having a couple of layers of tape in the transformer. Still not enough for safety, but not as bad as when the laquered wires are directly touching.
It will fail when those capacitors get hot and expand
these crappy charger never have , if i buy from china i only look for the branded one , and the charger i ordered work just fine , the in bult amp meter also function idk how accurate tho.
@@VJETRA tất cả đều được sản xuất tại Trung Quốc với mọi thể loại chất lượng thương hiệu nếu người mua không tỉnh táo cái giá phải trả khi dùng những sản phẩm kém chất lượng rất đắt 🤣🤣
"so today let's explore some potentially hazardus electrocution house burners" got me on the floor
This is why I always only buy Belkin, Anker, Apple and Samsung adapters 😮
that 5.2v hardwired 7-segment sure is funny
I think I’ve seen everything now after that fake voltmeter. About the only thing left now would be for them to come out with a charger so bad, it would cause breakers to trip, wiring to overheat, and finally earn an Ultra Dodgy rating lol. An idea for Ultra Dodgy would be red text on a black background, and skulls on both sides as well as flames.
Usually, where there is no fuse, a pcb trace becomes the fuse.
@@liam3284 The charger itself is a fuse :)
Mocking the print, and using a "certified" device with a "Sumsung" in it.
Ah, yes, the good old *Sumsung* smartphones.
You misspelled the word Samsung so that makes the charger sus to me.
@@IrtyGo560 It's not me - it's in the video. =)
They managed to spell just one word properly: _Fart._
But it wasn't intended.
"Great job, guys!" 😆 Another great video, thanks a lot!
If you hate someone in your life, gift them one of these.
nah, too slow. just give them those 240V to USB passthrough cable lol
@@n.shiina8798This may be illegal or unavailable.
That green film capacitor in the second supply is a dead giveaway for a low quality and questionable safety power supply. Over the years I have taken apart a lot of power supplies, and I have never seen those green film caps used in anything but garbage tier units.
I remember those from stuff from the 70's or so that I disassembled. Would that stuff be that old?
@@pizzablender those are PET/mylar capacitor and still produced today. it's just they did not meant to be used on certain places like as a class Y substitute where fail open mode should be guaranteed
Talk about threadbare pcbs. You can always tell by the weight as well if it's gonna stand up. I test all my new ones as well. Great video Dan
Thanks for your support! Yes, typically the lighter weight, the dodgier.
@DiodeGoneWild haha just wanted you to say that word even though we've spoke about this haha
They sometimes even put weights in it.
Wow, what a compact 5.2V constant voltage regulator! In a two pin package too! They never stop surprising us in China! 😃
The analogue paper display of your homemade bench power supply just made me wet myself laughing. As long as it is calibrated, safe and accurate and you are happy with it, all is fine. Just made me laugh is all. 😆
Seems that creation got completely forgotten in the world of consumption :)
@@DiodeGoneWild Yes, very true. Buy or Build? - that is the question.
Wow! He used the soldering iron instead of the soldering gun!
I've never been so disappointed... That little LED voltmeter looked so good in the thumbnail. I'd like to see inside the potting now to see just how little there is in there.
Danke! Thanks!
Thank you ;)
5:50 I laughed at this part.
I love that fake voltmeter more than I can say
Love this tear down revelation, thank you. Of course your thermal cam is Chinese as well.... ;-)
That LED display somehow attracted my attention, I would like to see the autopsy of that thing, because. Does they hardwired the seven segment LED display to show 5.2V or they just used one or two LED and blocked the light to dark segments using some material?
You can often open these with a Big Clive vice of knowledge...... pop it into a decent bench vice and they usually pop open, sometimes quite nicely and sometimes somewhat destructively :) thanks for the great videos.
Let me pause for a moment....to admire BigClives case opening skills.
Anyone know where to get the nice/slightly dodgy/dodgy/super dodgy graphics from?
4:28 The S7302SL using the auxiliary winding for feedback, so it would be regulated even without an optocoupler. There are also designs where neither an aux winding or a opto, like the LT8301.
The fake voltmeter is very wacko.
he was talking about fast charging capability. that small 6 pin "fast charging" chip has no any connection to the primary controller. though, usually the fast charging chip has nothing to do with bulk voltage output regulation. the fast charging chip itself that negotiate and regulate voltage output instead of telling the primary controller to increase/decrease voltage
Wasn't there some kind on QC 1.0 nonsense that was 5v with with amperage ? (not that it can actually do 3A)
I like these usb charger videos for some reason the most haha
Black is cool: Timed death trap with inbuilt precission multimeter!!!
5:52 this truely gave me a laugh 😂😂😂 a fake voltmeter??
"nothing has exploded" What a achievement
I love this series!
Great job
I like you accent more then the video itself am not even kidding am serious.
You are fun to listen to and in a positive way
Wow, i'd love more videos like this, the level of detail of your explanations is incredible
That first one, the 7 seg display made my day😁... oh and the spark gap saftey capacitor leads, and of course the auto transformer 😅 super duper dodgy
The small, 6 pin IC on the USB bus is just a TVS diode pair, not an actual active device
why? never seen before in charger
but why?. i can see the TVS used to clamp VBUS but i see no reason to protect the data line at this point?. shorting D+ and D- should be fine since they dont even comply to Apple's 2.4A charging protocol
5:56 Naiiiizz . Yes, I was laughing about this 😂😆
Hello. Can you test Chinese super VOOC chargers that are originally from OPPO (I read that are all fake)? Where do I find a super VOOC charger not OPPO original? Thank you.
They can scam people like this, but can't use Google translate!!
Chinese citizens has no access to Google unless they use vpn.
google is banned/blocked in China.
That fake voltmeter is amazing
And your cat is right. be careful with your new soldering iron as it can easily became a house burner
Amazing! There's someone manufacturing and selling fake voltmeters and someone else buying them...
That's so China...
I use the black one for about 3 years now 😊
Edit: Mine has no display, but will charge iPhone fast, probably 2,4 A. SDC-001 is the part number.
Also had a charger with (really) working voltmeter but a capcitor exploded one day. After replacing I found that it gets really hot, so I didn’t use it anymore
If you want I can send you the chargers when I‘m back home
You should have installed higher voltage capacitor and it should be fine.
@@EasternSurvival 16v rating for 5v USB voltage is enough 😉
Problem will be the transformer
I saw your videos earlier and given the accent I assumed you must be from Central Europe. And it hit me up when I heard "To je úplně na hovno" in the background @ 13:45.
What's with the hacksaw, you have a perfectly good angle grinder...
That charger was not worth using such a sophisticated tool.
That voltmeter is good for a cheap price but not included in chargers!
Great to see you again! I hope you are doing well. Keep up the great work, from your fan in Australia :)
Someone needs to send an IKEA model just for a change… those look NICE to me
They are very good. Big Clive tested and took them apart.
reputation is everything in business, you wont see any of these dangerous adapters sold by any known brand in the west - they wouldn't survive the legal consequences
How can I test the safety of my USB chargers without opening it and unrolling the transform? Should I use an insulation tester or just the ohmmeter?
Several kV insulation tester, i would think, to verify the breakdown. But you could at least open them gently, if possible, to take a quick look at how they are wound and see any cross-over points in the wiring. I don't think the ohmmeter will help because there has to be a big load induced at the same time.
.
I wonder if both of those supplies were trying to use the synchronous rectifier in CCM mode given it doesn't do any better than a regular diode in terms of heat.
Maybe the transformers were designed for DCM at 1A and they enter CCM at 1.8A. Or they have such a random inductance (too high) so they are already entering CCM at high loads. The datasheet of the S7302SL synchronous rectifier actually shows an example schematic of its use with the same primary switching chip, so it's probably meant to be used together. Maybe they're just to dumb to understand DCM/CCM. Or maybe they don't realize that the synchronous mosfet on state resistance can more than double at a high temperature. Or the cheap transformer produces some ringing that confuses the synchronous rectifier.
I would say ringing. The snubber network was rather toasty
Danny, Love how your cat knows best.
Two shocking examples of bad design.
05:56 😂😅 what a joke 😅
Wow very accurate 5.2v output
1:59 “How am I supposed to open it?” Well, that was a quick answer.
13:24 Bro, I have watched your videos since 2019. Loved your presentation skills 😊. Please make a video about Type C connection protocols and its using components. (Its Hardware side) I really need a ground level class from a tutor like you. please make a video. Request from an Indian viewer.
I think that first charger deserves an extension of the ranking to "Dodgy AF."
Don't you just love how eBay will sell non-compliant fire hazard death devices but when it comes to bolt-on car mods, they kowtow to EPA, regardless of if the car is for off-road and racing.
People's lives and houses are less important than negligible emissions contribution, especially compared to other industries like resources, military and aviation.
Even that one word is missing a character "i" , no one proofchecks these 😂
Fake meter make me laugh for few minutes 🎉🎉🎉
My money were on the "voltmeter" being fake right from the start.. :)
may i know what are the risk posed by these poorly designed charagers?
Strange secondary design, first time I see this "mirror" winding
Nice video. What do you think about showing the brands of the electrolytic caps and measuring their ESRs?
6:12😂😂😂 fake volt meter.. nice!
thanks for the explanation, appreciate it mate. what a beautiful cat.
Interesting desoldering tool, can I ask for a details?
I dont think I can perfectly understand evry word? But This is a really good video. Christ that fake voltometer really pisses me off too much!
I might not have a degree but I at least can have standards. These do not meet those standards.
"AD/DC adapter" oh I didn't know that band
03:53 I'm guessing they meant to use thermal pad, but none were thick enough so foam tape will do. Then you can immediately tell it was a fake display/meter because the proper meter would turn on only when load is connected.
They can make better chargers if they try, shame they have no morals.
Stick to known brands and good suppliers.
Your cat could make a better charger :-D
Thank you for revealing this. That voltage indicator is a real joke; it's just a display. lol
Unfortunately most of no name (or fake name) electronic equipment are made in China.
Anything, but HF transformer is real disaster 💀
Thank you
How do I open it? Next second: grab a saw-blade XD...
Fake LED voltage meter is too funny!
Nice, what a wonderful electric shock!!
the fake voltmeter is just a light box, i dont think it even has an led for each segment
i have a UK plug version thats the same as the black 3plug i stopped using it along time ago because i decided it wasn't safe
Sooo dangggerroooooous
is it really a synchronous rectifier or did they just put a diode in a SOP-8 package, v lol