Dangerous USB phone chargers 9 (with high voltage test)
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- Опубліковано 29 вер 2024
- Examining two pieces of dangerous fake cube shaped USB phone chargers. Let's test them and see what's inside, plus a high voltage insulation test. Some chargers may not comply with safety regulations and they may cause an electric shock or fire. Their current rating may be fake, the output voltage may be wrong and they can damage your devices.
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I'm definitely gonna need more high voltage testing :D
Cubes of Death.
I reversed engineered the Apple 5W "american version" of the off-line charger also known as the white 5W USB charging cube. In the user guide Apple states: "Don’t use the power adapter in wet locations, such as near a sink, bathtub, or shower stall, and don’t connect or disconnect the power adapter with wet hands. Do not use any power adapter other than the Apple USB Power Adapter to charge Apple Watch, iPhone, or iPod." So Apple gives the user fair warning as to personal safety.
If you use an off-line charger in a wet location you could electrocute yourself. The death part describes how given a certain amount of AC leakage and touching a phone while in the tube when connected to the charger could kill you. In the US we have GFCIs in most new construction in wet locations, so your odds of being electrocuted are lower with a GFCI.
The focus of the overall investigation, as with the content in the video, revolves around AC leakage and its sources in an off-line charger. Specifically, hipot testing to understand insulation breakdown. As the charger ages the insulation resistance will at some point breakdown where it could pose a hazard depending on the weakness in the design and how it contributes to AC leakage.
The apple design that I looked at had a Fusible resistor to protect the bridge. There where no X or Y capacitors used. 1 mm PCB slots where used to address voltage creepage. The transformer had a rather thick varnish on the windings, so level 3 varnish (thickest available) and was doubled full wrapped between windings. With the following turns: Inside winding Auxilary 152 Turns, Middle winding Primary 24 turns, Outside winding Secondary 11 turns. The control IC was an LP3773 in a special S08 package. The assembly used two boards.
The USB protocol charging resistors where not populated which I think is the default, meaning 5W charger.
Keep it up, nice video clip, thank you for sharing it :)
at 1:44 your fingers almost touches both pins of charger still under mains voltage..
The worse phone charger I ever had contained one rectifier diode, one resistor, a capacitor, a 5v zener and an LED. Needless to say there was no isolation and no fuse and the sleeve of the USB was live!
More dangerous than electric chair 😂
Literally the bare minimum
That's a real death trap.
@@schaltnetzteil495big clive did a rechargeable camping lantern where the metal case was live when it was plugged in to charge!
Capacitive dropper? That's dodgy lol
16:07 self-extinguishing design!
16:02 The electrolytic capacitor doubles as a fire extinguisher :D
i was thinking the same hahaha!
Some capacitor electrolytes are actually flammable,especially the old ones that contain probably boric acid and have a green flame.
Those are what you call fry back power supplies :)
What a fantastic sequence of failures, fully as expected.
So rarely caught on film, happening slowly, and also narrated to top it off. Beautifully done!
EVEN MORE VOLTAGE has a bit of the same energy as EVEN MORE SÄLT.
A bit.
The reason that cube shaped chargers seems to be popular is that, these are a clone of Apple's US 5W charger.
Of course the genuine 5w Apple cubes are much safer. :)
Are you sure?
Well, atleast from what I saw in several teardowns, it seems to be much better engineered with lots of safety in mind.
I also had a few of those cubes since the day of iPhone 6, and it still works to this day.
@@raspberryjo It's safe and outputs one of the lowest ripple DC. It's not necessarily the best of the best but it's up there in terms of quality. It still has that tell-tale voltage drop as you near the maximum rated current much like most other chargers. There are a lot of tests on the internet comparing popular chargers and the 5v Apple cube is a common mainstay in the comparisons. It's been proven.
I had one apple cube and it just let smoke out and stopped working
i have had 3 apple charger 1 5watt it exploded overnight another 5w it was a chinses fake also exploded a ipad 10w it also exploded I opened them up they were pain to open inside i got exploded capacitors
now using a Samsung charger for years
I've always wanted to see HV tests, but never thought to use a microwave transformer.
But the destruction from it is definitely welcome.
Also, the voltage drifting outside of spec on the first one would probably be beneficial with the garbage USB cables that come with these things, it'd help compensate for the loss on the cable lol
Yes, I saw USB cable made from aluminum wire it should go well with this charger
Mains ballasted with a fan heater or kettle can be quite destructive!
An old old bug zapper or neon sign transformer on a variac would probably be closer to a real hipot test, not as fun when things let go though.
@@Broken_Yugo Actually this is how a real HiPot test works, just the proper test equipments turn off on failure and has some safety features (start, interlocks possibly), and proper HV wiring. And usually less powerful for this level of testing, 20mA @ 5kV or so, which is 100W max. The microwave transformer is in the kW range.
The cuts with the cat where great, it looks like he is hiding from the microwave oven transformer tests in fear! :D
Thanks for doing these tests, it makes it allot more interesting with an isolation test, especially when the "safety capacitors" fail shorted, really great engineering!
I like how they don't trim the excess wire, potentially reducing the separation even more (or risking direct ccontact),
2:08 I don't even want to imagine how high mus be the ESL introduced from the capacitors legs
It always makes me laugh when he breaks out the Microwave bits and all the dodgy electronics, especially with all the warning stickers everywhere. XD
At least we all know you know what you're doing! (you wouldn't still be here if you weren't).
I often wondered what was meant "FireWire" connectivity. I guess now, I know!
did you notice at 13:07 that the secondary rectifying diode solder and the board seem to be overheating too much? they got brownish. Also, super interesting the new high voltage test, can't wait to see it on a proper safe USB charger, I wonder what did you use to limit the current from the microwave oven transformer, to prevent saturation of the MOT during the short-circuits.
I didn't notice, but yes, the secondary diode is often the hottest component in these chargers. Well, I didn't limit the current :). MOT's are somewhat current limited, but not for a continuous short circuit. The secondary short current during the second test was about 1A with 200V on the primary.
i think brownish soler might mean that the flux/rosin started liquidifying and going outside
Not only that: if you forward around 5 seconds you can see that the solder on the secondary side seems to have reflowed, probably it gets hot enough to cook the secondary side capacitor in only this short test!
A 2 kV MOT wont be enough for a proper charger,it will fail above 5 kV.
@@DiodeGoneWild can i use varistor as class y safety capacitor?
This HV-test only showed one thing: This board was quite safe. Being able to take about 1700 volts (short term) instead of 230 is an achievement actualy. 7x the net tension is quite good. And it was not an airgap between too close circuits on the board, but a piece of equipment, that failed, a piece with was probably rated for 500 or 600 volts only. Surprisingly good!
But still you don't want to entrust life of somebody unexperienced to this gadget.
But a decent Class Y1 capacitor, which is the correct one for that application, should be rated for several kV, so for it to fail at just 1.6kV proves that (a) it wasn't a safety Class Y1 capacitor, and (b) it wasn;t safe anyway, it was super dodgy.
19:12 "I can't even remove it in 1 piece!" *_somehow removes it in 1 piece_*
That new stress test is great. It would be great to see temperature of components with an infrared cameras during that time (I don't know if you have one)
Not safety class Y capacitors protect transformer from short circuit 😂
I suppose so - either the dodgy capacitor fails, or the transformer fails - but in any case, it will still result in mains on the secondary. :)
Didn't look at the channel name and thought this was one of Clive's or Electroboom's videos, so I was not prepared for this dude's accent lol.
Thanks for explaining why a short isolation disance is dangerous! I always wondered because I have never seen 120-240V jump across even a 1mm gap, but moisture, poor QC on solder joints, dirt, etc. were things I had not considered.
It doesnt even need to arc over.Just 18mA of leakage current could cause injury to some people who are sensitive to electricity.
If you are after some ideas perhaps try and one of the dodgy "hoverboards" that set fire to houses.
They’re little near-cubes because they’re trying to look like an Apple iPhone charger. They shouldn’t bother.
She let out the Magic Smoke!
👏👏👏👍
It would be nice to try to set fire to those plastic casings of the chargers, just to check how that Chinese "strong durable fire-retardant ABS" actually performs in terms of fire safety.
The second cube... I had one and it the secondary capacitor chose to explode because of an open loop (dead feedback zener).
Oh, and not to mention, IT WAS SAYING DESIGNED BY APPLE IN CALIFORNIA, written correctly and everything, but the internals looked definitely fake, very similar to yours! It had a proper 13003 transistor though.
For those who didn't know, Apple makes this kind of chargers for the US.
Very horrible. I wouldn't have thought EMC was a concern for the manufacturer, it would be safer if they didn't put capacitor, and even cheaper for them.
I've always wanted to see HV tests, but never thought to use a microwave transformer.
But the destruction from it is definitely welcome.
Also, the voltage drifting outside of spec on the first one would probably be beneficial with the garbage USB cables that come with these things, it'd help compensate for the loss on the cable lol
I guess you doubled your comment.
Your editing is getting super niiice.
Also wow these vids are really eye opening for those dodgy charges that you plug into the wall and often touch with your fingers..
Yay, thank you for the review and teardown of these house-burning electrocution chargers! That second one failed its high voltage test with spectacular results, may I add. :)
So the conclusion is: SUPER DODGY!
Hello! I woud like to donate something intressting for you! How to contact?
xbox psu is really well-made. Thanks for interesting video, as always.
Also is there next stage afte "Super Dodgy", like "Extremely Dodgy"?
Usually name-brand electronics PSUs are top quality because it isn't worth shipping the part that is most likely to fail for warranty replacement... No warranty replacement on Aliexpress-stuff..
Extremely dodgy would be a capacitive dropper supply or something else that wasn't even designed to be mains isolated.
Very good video
You should show a charger with better design and parts dissected
You have not made the video public yet so many have not seen it yet. I found it from the playlist
The early access is supposed to be a Patreon reward but apparently people can find it anyway. You can also sign up for a short time and exit before you are billed on the first of every month. (I am a legit $5.50 patron though)
Testing USB cables might sound fun too
Syooper Dodgeeeee
You need to short the output! Wonders what would happen to those cheap chargers.
Love your videos and analysis. It would be cool to also do the HV test just on the transformer before unwinding. Then you could indeed show where it starts failing. ..
I like how your USB tester survived 84Ah of "living on the edge" ;-)
Excellent safety check..keep these educational videos coming..thank you.
Yh I can assure u its very dangerooooos
The test of the disruptive strength was very interesting! Please put it always to your transformer tests.
2nd it's not extreme dodgy? Why?
I like your accent
Ultra dodgy 🤔😂🤣
His accent is the accent of all accents
16:30 The cat is satisfied :)
Cubes of death lol
2:36
Wrong, in China wires are fuses.
next we need the DGW Charger, made by you Diode, that be sick ^^ even tho if u send Anker a speck and they make a DGW charger, you would still make a video bout it and dismantle it :D ^^
Very interesting that the not Y cap let go first on both. I wonder if these dodgy transformers aren't as sloppy as they appear, carefully made just good enough to pass a 1.5kVAC hipot test.
3:35 that's interesting!
I bet those Chinese manufacturers don't even know what the cross is for, and just put one there to make it "look" right, lol. Everything is purely imitation.
100% pure Chinesium
Applying 1600 volts makes it explode and that's fun. But 1KV is already 3 times the 240 volt mains peak voltage, and you are going 60 percent above that, so it's not really fair on the poor charger.
No schematic :-(
22:05 interesting thing about this power supply is thing, that every fat Xbox 360 had same plug for power supply but also every next model had smaller power rating. I'm wondering how would first fat Xbox 360 work with last 360 fat power supply (jasper). It probably would turn on but when gaming it would shut down. Xbox 360 slim had different plug, but there was adapter to plug fat power supply to slim console (e.g. when your power supply failed and you wanted to buy used one).
Great breakdown and use of a Microwave transformer.
I am considering making a portable 500v DC USB adapter leakage tester.
I think it should also add a test at 1,000v, to be more critical.
I think the standards only require 240V adaptors to be tested at 500v
I think it will have a green and red LED output indication.
500V DC is just for routine portable appliance tests, to avoid stressing the insulation too much when performed repeatedly.
Factory and approval tests use much higher voltages than that (3kV AC for Class II with 230V/full range input, to my knowledge).
@@longrunner258 I just use my 7kV neon transformer for that :) I didnt try a charger yet,but a classic iron core transformer will withstnd a few minutes without failing.
Amazing
16:03 frame before cap blowing you can see blue light next to flex connector pin. Pause and use , and . to go frame by frame
Ah ik see this pop.s at the screen. hah... I take a bowl of popcorn and a can with softdrink and watch the SSJJUUUPPER DOOODDGY examinations😀😀😂😂😂😂👍👍👍👍💖💖💖💖💖
3:14 That's quite common with those cheap crappy capacitors. I've also seen such poorly pressed safety vents quite often. I also love the high voltage testing and how you show your cat in the videos. Great job!
A long ago i had the same cube phone charger and after 30 minutes of charging my device charger melted in the wall socket. Also i had ripoff apple charger and it also melted and smoked. Never buy cheap chargers, they are extremely dangerous!
There is a wifi backup UPS sold in India by a company called Energy Intelligence i want you to test their ups as it does not have power off switch 🤣🤣🤣 it stays one once u charge it and only way to stop it is to discharge it🤣🤣🤣
we need a new category: super deadly dogdy
Or ultra dodgy.
Self-disassembling, specially designed for DGW
another possibility for the USB ports is that the manufacturer chooses improperly stored old stock parts because they are cheaper
@diodegonewild I came up with stupid idea about a local service company where you will take your electronics for safety test.
I wish you did not break the last charger that Optocoupler had and in the next video you increased the Duty Cycle to see how much power it gives.
Does your cat blink?
No, he is always shocked
but, wild-diode sir, we not really have any statistics of exactly how many people died on these cubes !
Not a fuse in site, just living its best life. Thanks for the video!
I am not a cat lover but I must say that your kitty is very pretty. Great tests and evaluation as always. Happy New Year.
The first video i ever saw from u was " a little more salt" you madman are still puting out awesomr content!
Apple no longer including real ones just increases the population of dodgy chargers out there lol
Please test some genuine phone chargers by reputable phone manufacturers
High voltage test failing was excellent! 😂👍
I was hoping the second would go in the "Mega Dodgy" category :((
Plase make video on Vivo flash charger 2.0 33W
12:00 same as mine, I replaced it with fresh but higher capacitance one
why was"nt the isolation capacitor noticed. that capacitor was shorted
Ok this video is great but im sory im little bit annoyed by the way he talk lol🤣
The second one was much better ,it because it exploded kkkk
Very good channel with good explanations.
I have a charger which always pulsates Hah
Second One Much more Entertaining....lol
0:42 That serif font is never a good sign. It is not even printed straight.
super video, ale prosim prosim, pustte si obcas nakej anglickej film, ta vyslovnost primo trha usi :)
So cute 👍🏻👍🏻 🇮🇳 || Kuki 14|01|2022
I believe the robot from Finch stole your voice
"The mains go straight into the..."
F U L L B R I D G E R E C T I F I E R ! ! !
all videos on this youtube channel is excelent !
Great video.....awesome and smart cat..!!!
Hey where the link for xbox psu😅
You didn't use your fire extinguisher.
good video! but your english is bad...
Your hair dryer doesn't look save too ; )