Very informative! Huge thanks. Makes me realise as a former r&d lab technician this is truly scary. I will stick to originals from now! And on top you accent sounds very nice. Great video!
I think it would be valid (even necessary), to test at the max voltage the supply outputs because the device plugged into it will negotiate the max voltage it can, it can’t read that the supply wasn’t rated for that voltage. It’s even more dangerous that the supply can negotiate a voltage it’s not rated for!
Hi DiodeGoneWild, Could you perhaps also measure the ripple of the output of these chargers? I think you’ll find significant differences between the chargers. I noticed that when I charge my phone with certain chargers, I can hardly use it during charging. I assume that those chargers have too much ripple but I don’t know for sure.
Or output some serious RFI /or EMI but I guess that would be difficult to measure. Let me guess, scrolling is an issue when connected to some chargers?
I think it would be worthwhile to look at the DC output with an oscilloscope. I’m currently making a video about a USB phone charger I bought off Amazon, while the output voltage stays well above the minimum voltage and it doesn’t overheat and shutdown, there’s about 2 V pk-pk on the output due to a not low enough ESR output capacitor and lack of a snubber network on the synchronous rectifier. My charger also had the same sticky yellow stuff in the plastic case, I thought it was probably lubricant from the injection molding machine, there was also some black stuff around the ejector pin marks.
Likely excess glue from the solvent welding as well, as hand assembly is probably using a piece off wood to dab a blob around the case then shoving the board in, then the top cover. Using whatever glue they find cheap, and thenn adding extra thinners to make it last longer and not be as thick.
For the first charger, you should definitely have tested 12V in a long run, because what if you plug a phone that can ask for 12V? It has to still work as the phone would probably say OK to 9V if the charger couldn't give 12V. EDIT: for 18W power supplies that can work with 100V input voltage, the smoothing capacitor should be like 33uF, not just 6.8uF. You should test them at 100V in your variac to see if they start cycling when you load them significantly.
Hi DiodeGoneWild, I really enjoy your your analysis technique of electronic devices... you explain things so well with reasons why parts are good or bad... I particularly enjoy your cat's comments from time to time... they actually make me laugh at times... Thanks for your very professional presentations on UA-cam.
Experience has taught me to always avoid anything that has the word "original" written over it. 99.9% of the time the product is fake and of very bad quality.
That 'safety capacitor' in the first one looks like the inscriptions have been made by hand. Like, as if they were drawn by hand and then laser etched. I would suspect it is a normal 1kv non Y-rated capacitor, with some markings added to it to make it look like an actual Y class capacitor.
Yeah, I noticed that as well. They used a hand engraver to mark it. However, in the past, he's given a rating of "dodgy" to devices with a 1kv capacitor as well, provided they're otherwise ok, so that probably wouldn't really change the final verdict. He seems to assign the highest priority to isolation distances, which is reasonable.
@@eDoc2020 I don't think faking them is actually worth it. The real ones aren't even that ecpensive so why would you go through the hassle of faking them?
Its really scary how crappy the isolation between primary and secondary is on these chargers. 3mm creepage distance is sketchy at best, considering you need ~500V/mm to arc along a creepage path, so a 2 kV spike during a lightning strike would probably jump the gap. They even put a slot in the second charger, just not where it actually mattered...
Danyk, when you will start to use a designated USB QC Trigger port on the electronic load? It will eliminate some voltage drop on the trigger. It is the one that is pointing UP!
The first one sure looked familiar, so I checked and it's indeed the same one as #7 from your first round-up, including the manufacture date (or at least that claimed). They even made that same mess on the USB port soldering! This would retroactively invalidate the "NICE" conclusion from then.
Have you ever considered testing these sketchy transformers on some sort of variable HV supply to see where they fail? I'm fairly certain they'll fail as everyone predicts, but I've never seen it confirmed.
Anker chargers should be very nice, since it's a reputable brand (some time ago their GaN powerbanks were even sold in Apple Store). Personally I own their nano 20w Type-C charger and charge a really HUGE Xiaomi 30000 MAh powerbank with it (obviously, at the charger's maximum available power). And if I touch the charger during operation, it's warm, but definitely not hot. If you want a disassembly video, there is one on ChargerLAB channel (without transformer autopsy).
It is a pity that you do not check the voltage transients (ripple) at the output of the charger with the oscilloscope. This is probably the most important parameter.
I am curious if DGW had to design a safe grounded charger what features he would include. So let's say the charger will use a three prong plug, which includes ground, instead of being double insulated. What would the design look like?
I had a lenovo phone and i am still using it's charger, it is getting a bit hot in operation but never get too hot. It works more 4 years without any problem. I am expecting to see it's internals.
1:11 they probably accidentaly write frequency in Indonesian Language so that is why it does looks weird, 2:04 lets test with 9 volt tester, *pulls out the cover and usb*. I would say thats top 1 safe usb charger.
In the first one, the lead of the diode was close to the electrolytic. In the second one the body of the diode was close to the electrolytic. The thermal problem with the second is a lot worse than the first. There was no reason why the diode in the second could not have been mounted like the first, it just needs the other lead to be left long and bent. The way the second did it was an unforced error.
We've seen a lot of dodgy supplies here. Do you plan to make a test of some good examples? Something what you can buy here in EU? I wonder if they will be really better.
Something that confuses me in these SMPS - why do they only use ONE output diode? Doesn't that mean that half the output waveform is wasted, and hence half the power is wasted too? And then you get much more ripple on the output, requiring larger filter cap. Maybe I am missing something, but I just can't get my head around it.
It's a flyback converter which means that it can only deliver output power during the time that the switch is OFF. Full wave rectification is not possible.
@@petehiggins33 - Thanks very much! Well, that was a brain fart, considering that I know that's how they work LOL. For some reason I got stuck thinking that the secondary was putting out a full "sine wave" (referenced to something or other), despite the pulsed input on the primary. GRRR, now I feel silly.
The PSU designation in Russian is actually correct, but the font is off kilter, like they didn't know how to type Russian and resorted to doing so in Latin and shifting the letters around manually. They did mess up "vietnam" though. The "Origianl" misspelling in a Samsung oval is hilarious though.
When the logo on the front says "original" and the logo on the back is a Samsung ripoff that says "origianl", you barely even need to take it apart to know that it will be dodgy. 😄
yes awful. also i was reading the QR code on that side by my phone, and it says: Adative Fast Charging... yes "P" is missing. That QR code is totally unneccesary but at least looks cool on a product. very pity product.
Yep - big ripple out the ass end, which helps exercise your phone's input capacitors (you don't want them to get lazy). Don't forget the conducted noise onto your mains wiring, plus a big blurt of RF over the top.
@@johncoops6897 as much as I appreciate the in depth tear downs I do feel like some scope analysis could add another dimension to things. These horrible USB chargers are all pretty horrible. And almost identically horrible too.
Overall, I do not understand the logic of using inexpensive insulating tapes to make transformers that are not temperature resistant if the windings overheat when using the charger at maximum current. The price difference of kapton tapes in this small amount per piece of charger is negligible.
Ahoj, testoval jsi někdy nabíječ, který měl dobře navinutý transformátor a byl bezpečný? Nebo byly všechny dodgy. Hi, have you tested a safe charger anytime? With safely wounded transformer? Or all were dodgy?
4:01 Orijinal değil ama orijinali biraz yakın yapılmış o kadar çok sahtesini 🎫yaptılar ki artık insanlar ve üreticiler üstüne büyük harflerle orijinal🎬 yazmaya başladı.
There is 50Hz in Eruope. Voltage in USA is 120V,not 110.Also,there is no 220V in Europe,almost all countries converted to 230V by the mid 1990s and some around 2008.
It’s funny how close some of these come to being safe. So little would need to change for the first one to be non-dodgy
true, I was rooting for it since the beginning. What a shame!
There was some "fine" one's before already...
I'd call the first one "slightly dodgy"
His knowledge is very very High
I thought so too but then I wondered if the first one would overheat too when overloaded.
We finally got "Origianl" again @ 1:05. When I saw it the first time in one of your older videos I really needed to laugh.
Very informative! Huge thanks. Makes me realise as a former r&d lab technician this is truly scary. I will stick to originals from now! And on top you accent sounds very nice. Great video!
I love this series! Thank you for filming it!
I think it would be valid (even necessary), to test at the max voltage the supply outputs because the device plugged into it will negotiate the max voltage it can, it can’t read that the supply wasn’t rated for that voltage. It’s even more dangerous that the supply can negotiate a voltage it’s not rated for!
I don’t really understand electronics I just like listening to the commentary. Well done and thanks. Cheers Stuart
Hi DiodeGoneWild,
Could you perhaps also measure the ripple of the output of these chargers?
I think you’ll find significant differences between the chargers.
I noticed that when I charge my phone with certain chargers, I can hardly use it during charging. I assume that those chargers have too much ripple but I don’t know for sure.
Sounds like excessive ripple. Could even be a capacitive dropper...
I just left that comment myself.
Or output some serious RFI /or EMI but I guess that would be difficult to measure. Let me guess, scrolling is an issue when connected to some chargers?
@@Luke-san you can get a fairly good idea of the RF and EMI with an AM radio. You can definitely tell if more filtering and shielding is in order.
@@Luke-san exactly!
How did you know? 😜🤣
I think it would be worthwhile to look at the DC output with an oscilloscope. I’m currently making a video about a USB phone charger I bought off Amazon, while the output voltage stays well above the minimum voltage and it doesn’t overheat and shutdown, there’s about 2 V pk-pk on the output due to a not low enough ESR output capacitor and lack of a snubber network on the synchronous rectifier.
My charger also had the same sticky yellow stuff in the plastic case, I thought it was probably lubricant from the injection molding machine, there was also some black stuff around the ejector pin marks.
Likely excess glue from the solvent welding as well, as hand assembly is probably using a piece off wood to dab a blob around the case then shoving the board in, then the top cover. Using whatever glue they find cheap, and thenn adding extra thinners to make it last longer and not be as thick.
i missed your cat and some doggy charger review 👍 thanks to best electronic teacher ever 🙏
Doggy charger lol
For the first charger, you should definitely have tested 12V in a long run, because what if you plug a phone that can ask for 12V? It has to still work as the phone would probably say OK to 9V if the charger couldn't give 12V.
EDIT: for 18W power supplies that can work with 100V input voltage, the smoothing capacitor should be like 33uF, not just 6.8uF. You should test them at 100V in your variac to see if they start cycling when you load them significantly.
hummmm may be you should open a youtube channel ;)
Hi DiodeGoneWild,
I really enjoy your your analysis technique of electronic devices... you explain things so well with reasons why parts are good or bad... I particularly enjoy your cat's comments from time to time... they actually make me laugh at times... Thanks for your very professional presentations on UA-cam.
The pink transformer in the second charger is a Big Clive special.
You beat me to it. As soon as I saw the pink tape I though of Clive.
Don't turn it on - wait until it falls apart! (Sorry, Dave Jones)..
Experience has taught me to always avoid anything that has the word "original" written over it. 99.9% of the time the product is fake and of very bad quality.
Well, the first one was 'Origianl'
@@takeo3998 AND, it actually turned out to be acceptable. See? My thought process is untouchable lol
That 'safety capacitor' in the first one looks like the inscriptions have been made by hand. Like, as if they were drawn by hand and then laser etched. I would suspect it is a normal 1kv non Y-rated capacitor, with some markings added to it to make it look like an actual Y class capacitor.
Yeah, I noticed that as well. They used a hand engraver to mark it. However, in the past, he's given a rating of "dodgy" to devices with a 1kv capacitor as well, provided they're otherwise ok, so that probably wouldn't really change the final verdict. He seems to assign the highest priority to isolation distances, which is reasonable.
No it's too thick for a normal cap. It's shaped like a safety one.
@@westelaudio943 They make ordinary caps in the same package as safety ones.
@@eDoc2020
I don't think faking them is actually worth it. The real ones aren't even that ecpensive so why would you go through the hassle of faking them?
Its really scary how crappy the isolation between primary and secondary is on these chargers. 3mm creepage distance is sketchy at best, considering you need ~500V/mm to arc along a creepage path, so a 2 kV spike during a lightning strike would probably jump the gap.
They even put a slot in the second charger, just not where it actually mattered...
Danyk, when you will start to use a designated USB QC Trigger port on the electronic load? It will eliminate some voltage drop on the trigger.
It is the one that is pointing UP!
16:22 Note that the large diode could have been installed so that it would have been further away from the electrolytic capacitor.🤓
Well spotted. Very good point and such an easy improvement.
Love it when they even spell "Original" wrong (1:05).
also such a Samsung logo ripoff
An original spelling?
Origianl 🤣
Dodgy spelling.
SuUUPEER DOODGYYY😅😅😅
1:5
Cat : Your transformer flew away again !
You : Of course ! it's a Flyback !
You test beyond real world, my phone asks for less than your test shows.
I bet a megger test would punch through the lacquer of that
Lol! I can't help it. I had a Sesame Street flashback. "1,2,3....3 turns ah ah ah!" Great video sir!
Please make a review of an Baseus 65W GaN Charger.
Would be nice to see if it is a serious charger, because it costs about 30$
I appreciate your thoroughness! Both testing and disassembly were fascinating. Were the secondary diodes silicon or Schottky?
The board on the second one says QC2 even though the package says "Quick Charge 3.0."
These type of videos are old but gold!
Is it just me or is that molten hair dryer getting more molten every time
I think the hair drier was what dripped it's oozing goop into the 2nd USB enclosure.
at 1:06
the word "TEGLISTRIK" -> "Tegangan Listrik" Indonesian (or Malay) word for Voltage.
Also Frekuensi came from Indonesian/Malay laguage
It's Indonesian. If it's Malay, it'll simply be "Frekuensi Elektrik"
"Al Jazira Original"? 😳 I would not even touch it and call the bomb disposal squad. 😁
Thank you for making this video, I now see phone chargers in a completely different light, and probably other cheap power supplies too!
First time I've seen pink tape ! I still sit here chanting "Super Dodgy" before he says it.
The transformer flew away. But it should come back since is a fly-back transformer, right?!
The first one sure looked familiar, so I checked and it's indeed the same one as #7 from your first round-up, including the manufacture date (or at least that claimed).
They even made that same mess on the USB port soldering! This would retroactively invalidate the "NICE" conclusion from then.
A quick interference test with a pocket radio could be an interesting additional test.
it would be nice to test the transformer on 2kv isolation tester. what do you think?
Fast charging and fast opening 🤣
One of my favorite series!
“This doesn’t start well.” I’m laughing my a&$ off.
16:50 killed me XDD
You know it's a good charger if it says Origianl.
@1:11 - "teg listrik" is Indonesian for "Electric Plug." apparently.
Have you ever considered testing these sketchy transformers on some sort of variable HV supply to see where they fail? I'm fairly certain they'll fail as everyone predicts, but I've never seen it confirmed.
I wonder how dodgy my Anker PSUs are. They are tiny and can supply so much power
GaN transistors are no joke
Anker chargers should be very nice, since it's a reputable brand (some time ago their GaN powerbanks were even sold in Apple Store).
Personally I own their nano 20w Type-C charger and charge a really HUGE Xiaomi 30000 MAh powerbank with it (obviously, at the charger's maximum available power). And if I touch the charger during operation, it's warm, but definitely not hot.
If you want a disassembly video, there is one on ChargerLAB channel (without transformer autopsy).
02:24 I think the QC Trigger can be plugged in the usb port of your dc load.
nice work as always mr diode 💘😎
The constantly accentuated sentence endings make me think it’s leading to something shocking
That orginal charger was in a different video saying they were safe but ended up being dodgy
It is a pity that you do not check the voltage transients (ripple) at the output of the charger with the oscilloscope. This is probably the most important parameter.
I am curious if DGW had to design a safe grounded charger what features he would include. So let's say the charger will use a three prong plug, which includes ground, instead of being double insulated. What would the design look like?
You can plug the Quick Charge Trigger into the USB Port on the USB Load. Saves a bit on the clutter
I had a lenovo phone and i am still using it's charger, it is getting a bit hot in operation but never get too hot. It works more 4 years without any problem. I am expecting to see it's internals.
You can plug 9V trigger in upper USB port of load with. So no voltage drop. It just need data pins.
1:08 its Indonesian language and yes this charger is very common in Indonesia
The first one's lightening symbol hardly lends itself to a confident feeling, however it does look a lot like Tannoy's original logo, which is nice!
1:11 they probably accidentaly write frequency in Indonesian Language so that is why it does looks weird,
2:04 lets test with 9 volt tester, *pulls out the cover and usb*. I would say thats top 1 safe usb charger.
On the backside "Origianl". 🤣
_Now let's try to switch to 9V using this test tool..._ 😱😱😱🤣🤣🤣🤣 ok, that was MORE than unexpected
2:03 ajajajaja, me alegraste el dia.
Tome su like buen hombre!
In the first one, the lead of the diode was close to the electrolytic. In the second one the body of the diode was close to the electrolytic. The thermal problem with the second is a lot worse than the first. There was no reason why the diode in the second could not have been mounted like the first, it just needs the other lead to be left long and bent. The way the second did it was an unforced error.
We've seen a lot of dodgy supplies here. Do you plan to make a test of some good examples? Something what you can buy here in EU? I wonder if they will be really better.
I love this video series
I like how orginal tries to copy s Samsung charger then it's not orginal
So ladies and gentlemen, we have dodhy and super dodgy one today 😁
Thank you. Good work.
Very thorough!
1:05, 1:10
That's Indonesian, maybe the charger is also sold in Indonesia.
You should get an insulation resistance tester to test these things.
TEGLISTRIK (tengangan listrik) is indonesian mean voltage.
10:30 It would have been nice if they added a longer copper wire.
Something that confuses me in these SMPS - why do they only use ONE output diode? Doesn't that mean that half the output waveform is wasted, and hence half the power is wasted too? And then you get much more ripple on the output, requiring larger filter cap.
Maybe I am missing something, but I just can't get my head around it.
It's a flyback converter which means that it can only deliver output power during the time that the switch is OFF. Full wave rectification is not possible.
@@petehiggins33 - Thanks very much! Well, that was a brain fart, considering that I know that's how they work LOL. For some reason I got stuck thinking that the secondary was putting out a full "sine wave" (referenced to something or other), despite the pulsed input on the primary. GRRR, now I feel silly.
Both transformers have only one secondary winding., so how does it supply different voltages
The PSU designation in Russian is actually correct, but the font is off kilter, like they didn't know how to type Russian and resorted to doing so in Latin and shifting the letters around manually. They did mess up "vietnam" though. The "Origianl" misspelling in a Samsung oval is hilarious though.
Where can I find a USB test load like the one you have?
In one of your old videos you already tested the algazira original chargers and they were trusted ones
When the logo on the front says "original" and the logo on the back is a Samsung ripoff that says "origianl", you barely even need to take it apart to know that it will be dodgy. 😄
yes awful. also i was reading the QR code on that side by my phone, and it says: Adative Fast Charging... yes "P" is missing. That QR code is totally unneccesary but at least looks cool on a product. very pity product.
any chance of testing oem, eg samsung, apple, or have you done that already
I'd love to see the ripple these chargers put out. I'm thinking it could be super dodgy.
Me too! 😉
Yep - big ripple out the ass end, which helps exercise your phone's input capacitors (you don't want them to get lazy). Don't forget the conducted noise onto your mains wiring, plus a big blurt of RF over the top.
@@johncoops6897 as much as I appreciate the in depth tear downs I do feel like some scope analysis could add another dimension to things. These horrible USB chargers are all pretty horrible. And almost identically horrible too.
@@Conservator. scope, scope, scope! We know Dan has some.
@@1pcfred
Imagine if he would do a video explaining how to mitigate excessive ripple. Just adding a capacitor might not be the best idea.
Overall, I do not understand the logic of using inexpensive insulating tapes to make transformers that are not temperature resistant if the windings overheat when using the charger at maximum current.
The price difference of kapton tapes in this small amount per piece of charger is negligible.
They should make DODGY stickers on a roll😊❤️
Could be merch for the channel.
@@1pcfred Good comment, that's an idea. Tell me if i'm wrong but I don't think he has any merchandising, perhaps he should think about it .😀
@@brucepickess8097 I can see a use for dodgy and super dodgy stickers in this world.
The first charger made me laught so hard😂
Worth it for The Hologram alone..lol
Copper wire or CCA, my bet is CCA, as copper is more than the cost of the device as scrap alone.
Ahoj, testoval jsi někdy nabíječ, který měl dobře navinutý transformátor a byl bezpečný? Nebo byly všechny dodgy.
Hi, have you tested a safe charger anytime? With safely wounded transformer? Or all were dodgy?
2:09 Ben de senin gibi çok şaşırdım😨 nasıl olur da taktın gibi çıktı.
Please make some videos about different LED bulb drivers
Nice video, thanks :)
Where did you get the USB Voltage and amps meter you have link ?
Hello Sir , Please let me know where we can buy USB Isolator . Thank you
Please make a video showing how to modify a 12V half-bridge SMPS to a variable output!. Thank you sir!
The first one was an origianal again. Two times this brand made a good charger. Sadly can't find these. Can anyone?
i feel you just overdo it about the first charger because it seems the best of all chargers been seen so far
the 2nd charger looks very very bad
Try to test cheap GaN chargers as well
Better series than squid game
shit..!
i was thinking the 1st one to be safe, but the transformer has ruined everything at the end...xD
I have using original samsung 5v 2 amp charger but when i charging powerbank its gettin too hot is it dangerous ?
4:01 Orijinal değil ama orijinali biraz yakın yapılmış o kadar çok sahtesini 🎫yaptılar ki artık insanlar ve üreticiler üstüne büyük harflerle orijinal🎬 yazmaya başladı.
If these things gets more dodgy I’m afraid my ipad will explode 💣
Dude you were making really nervous @12v. Where is 60hz 220v in Europe? Asia has variable voltage UK? USA me 60hz 110/220
There is 50Hz in Eruope. Voltage in USA is 120V,not 110.Also,there is no 220V in Europe,almost all countries converted to 230V by the mid 1990s and some around 2008.
teglistrik (tegangan listrik) and frekuensi are Indonesian (electric voltage and frequency)