Did anyone else notice that near the end (20:47) when he shows the underside of the "super dodgy" circuit board, the solder joints near the bottom edge look like little skulls? How appropriate!
The first charger was absolutely baking itself at the maximum load it could supply without shutting down. Those chargers are getting better and better. These videos never get old. Edit: If a USB charger says "original" on it, you know it's the farthest thing from the truth.
I like these dangerous USB chargers videos. It is good that you show these chargers for the death traps that they potentially are. Anybody considering buying a new charger for their phone, tablet, etc should watch your videos before buying anything. I had to buy a new charger for my phone recently and decided to pay the money for a Belkin 60 watt dual charger which delivers 30 watts on each USB C port. It supports all of the necessary communication support with the devices connected to it to set the right charge voltage and current. It would be nice as a comparison if you could test a Belkin charger and tear it down just to show what a properly engineered charger circuit should look like. I love your videos by the way keep up the good work!
Danyk - you should make some videos about EMC /RFI supression and why buyers should care. Also a video about Output Voltage Ripple, why it matters, and what level is acceptable
This is why manufacturers should still provide OEM charger!! Over 1000 euros(!!) for a phone and no charger, while 100 - 200 € phone comes with charger and headphones. Or make it that while buying phone offer OEM charger for 5 €! I bought 29.9€ Honor supercharger (66 Watts and comes with good cable) not a bad price, but before it came with phone..
I lost my OnePlus charger, so bought an $18 65w charger to replace it and my phone only goes to 30w (its an older phone) and that charger gets very hot. It works fine though, and it's been a couple of years without issue.
@@WuTangChopstick I didn't, but midrange phone, like Honor 90 512/12 (I'm replying with one) cost 399€, no charger, no headphone jack, no SD-card. Someone could want the latest tech with best connectivity and 5 years of updates. Reason just doesn't matter, what comes in the box does.
Unreal temperature, how long that silicon can last. I have always thought that if I was making something electronic, the temperature of the component above 80-90 °C is fatal. And that is not the case at all. But apparently it brutally reduces the long-term life.
Plenty of silicon can be good to 125 degrees Celsius (that's a standard maximimum specification for mil-spec analog and logic parts for example) and some parts can be designed to be OK as high as 175 degrees Celsius under specific conditions. Lower temperatures that you mention are often upper limits for high-density parts such as modern CPUs, but the silicon can often take more heat, it's just that the timing and leakage current parameters go beyond their workable values. Either way, the design must be able to get the heat away safely - not something that these supplies are capable of.
2:50 It may also be a Y2 capacitor as the Y class is always suitable for mains to grounded or mains to touchable. Often, ceramic Y2 capacitors also carry the X1 designator, but Y1 is more rare and expensive.
That second charger is a public health hazard with the mylar film capacitor. Made about as cheap as possible. The solder work on the circuit boards look like it's all by hand, it's too messy looking for a machine.
Nah, hand soldering is too expensive, it’s just really poor wave soldering. Just the LED current limiting resistor looked like hand soldering. But it could still be low-quality wave soldering.
Haha, I could tell that the second one wasn't going to be very good... The first one was also really nice, getting over 180 degrees C whilst in operation! Electrocution houseburners!
Fantastic video! What kind of thermal imaging camera are you using? Its so small and the resolution is really good. No wonder these chargers are suspiciously low priced when they offer so much.
On the first one, it's hard to call it "thermal protection" if it cuts out at 190C; that's nearly enough to combust paper. However, it's surprising that the transformers had reasonable separation between layers. The second one might actually be safer because it can't sustain enough current to bake itself. Failing to reach 2A of current is both a fraudulent claim *and* a safety feature. 680mV PP ripple on a 5V supply is not a useful feature, though, and the transformer is deadly.
really happy xiaomi actually gave me the 120w charger packaged with the phone. even charges a macbook quickly, didn't expect that. wish i had your knowledge and equipment. really wana know if it actually reaches 120w
What about those wall sockets and extension cords with USB included? I guess only the finest super dodgy technology. And it's always connected and waiting for meltdown or to make things electro-cute.
@@DiodeGoneWild I think leaded solder is only used for medical equipment, where lead free solder is explicitly forbidden because it is not reliable enough.
@@mernokimuvekIt’s not that lead-free is unreliable, it’s simply that it doesn’t have a long enough history of use to have _proven_ its long-term reliability. But we will soon be there, I think, and some of the lead-free exemptions are actually expiring (and I think medical is one of those).
@@oliverer3 I don’t think eutectic vs. non-eutectic makes any significant difference. Again, I have yet to see any real evidence of _any_ reliability problems due to the solder alloy itself. There were _process_ problems early on, but manufacturers have long since figured that out.
Your advise is sort, I have just purchased second hand RIGOL DS1052E 50MHz Dual Channel Oscilloscope. There is a hack to upgrade to 100MHz is it safe to do so ?
When specifying a transformer like this It must be made clear that the auxiliary winding requires extra insulation from the secondary. Perhaps this was done but the manufacturer ignored the engineer’s instructions. Maybe the samples were made correctly but the production transformers were not. Always keep an eye open when having your product made in China.
I guess the markings on the second charger only mean that power comes out, and it has a brand. That indicator light would be awesome if it back lit the brand name from the wrong side of the board.
i created an contraption to fast charge 16850 with a power bank board and a two headed charger (that has 2 transformers) and the strain that i knew the charger was going to get made me put a fan, ironically enough the capacitor of the unused side popped but the side being beat to oblivion was fine. but i changed the cap now the unused side works fine again. Also passive cooling is useless on chargers, but in my case the fan didn't let it get even warm. (the board was exposed to the direct air which is extremely dangerous but i made a new case to it)
It’s the tiny electrolytics that have 400v rating in these chargers that get me. They really need to tighten up on LVD regulations. They run these these components right on the bleeding edge.
@@tookitogo Does LVD go so far as checking to this level? As far as I’m aware they don’t tear down transformers or check specifications of components are adhered to. It seems to be a basic check done by a local certification company with good relations with the factories. They are tightening up on the GPSR, too many of these devices are slipping through the net with a paperwork CE certificate.
@@JT_2024-c8j I honestly don’t know. But that’s kinda my point: the Chinese vendors don’t bother to comply with even the loose regulations now. They’ll happily slap a CE logo onto some crap that hasn’t even had a cursory inspection, never mind a real-life safety test like UL performs. :/
Bir izleyici olarak acaba benim bir ricam olacak senden infinix 45 watt'lık şarj aletini de bize gösterebilir misin onun mekanik içini nasıl yapıldığını çok merak ediyorum.
With that second charger I have to wonder why it has so many USB connectors. Realistically you can only use one of them at a time. Were the designers being optimistic and they figured they'd give you extra so as you wore them out you'd have more to use?
Hmmmmmmm, "designers" ?????, so this was designed ????. Designed - planned or conceived in detail or for a specific purpose. Failed to meet that definition completely.😏
@@brucepickess8097 yes someone definitely designed the product. But those USB ports seem like they are largely decorative to me. They give the impression of power but don't deliver on the promise. It is all a big front. I'm thinking that was by deliberate design too.
You could charge multiple smaller things at once, or large things at a reduced rate. I believe smartphones would limit charge rate without cutting out. Four smartphones would eventually charge up but you wouldn't need to move plugs like you would with only one connected.
They could have used the SR502, 3 or 4 instead of the SR510 The other variants have 20, 30 and 40V reverse voltage, which is plenty for a 5V supply, instead of the 100V of the SR510 But also they have only 0.55V forward voltage instead of 0.85V which results in 0.6W less loss at 2A That would reduced its temperature from 110°C to only 80°C This exact diode must have laid around somewhere for cheap, there is no reason to put in a 100V one
@@sergepetrov8598 You are right. But on the secondary side these voltages are around the output voltage in reverse at maximum maybe add 10V in reverse to the 5V on the output and a 20V diode should be enough already The same goes for the input, but since there are voltages around 300V pressent, this means you need at least a 600V transistor for switching
@@mitropoulosilias Uh, no. Every alloy can be viewed as a base eutectic plus any excess that may be present of a constituent metal. For example, 60/40 solder is metallurgically 63/37 plus 3% excess lead. This matters because the temperature of the eutectic is the temperature at which the alloy begins to melt. 63/37 tin-lead is a eutectic, so it has a single melting point, not a range. That temperature is 183C. So 60/40 solder, which is not eutectic, is actually a large amount of 63/37 eutectic, plus small crystals of lead. Consequently, 60/40 solder starts to melt at 183C, but doesn’t fully melt until several degrees higher. Tin-silver-copper lead-free eutectic melts at 217C. Not below. Tin-copper lead-free eutectic melts at 227C. Not below.
5V is the baseline voltage. There are protocols (e.g. Power Delivery, Quick Charge) that allow negotiation between power supply and device. Without increasing the voltage it would've not been possible to safely deliver more than ~15W (~3A).
I've seen roots of future tin whiskers under magnification, though judging by my experience, tin is not the major ingredient in most of chinese solders. Some chinese marketing department have found a way out of their stupid idea to produce colorful USB connectors with demonstrated second "product".
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
As expected, this man can use anything as a pointer
Im still waiting for 🍌 as a pointer
Did anyone else notice that near the end (20:47) when he shows the underside of the "super dodgy" circuit board, the solder joints near the bottom edge look like little skulls? How appropriate!
Yeah ! I see 'um LOL !
😮
They do look like skulls 😂
💀💀💀💀
oh boy oh boy oh boy. DGW gettin back to his roots.
Danke!
Thanks a lot to continue this series!
The first charger was absolutely baking itself at the maximum load it could supply without shutting down. Those chargers are getting better and better. These videos never get old.
Edit: If a USB charger says "original" on it, you know it's the farthest thing from the truth.
How about "orignial"? 😅
@@DrBeat-zs9eb Or "origianl" 😂
One of the chargers he opened in an earlier video actually said "origianl" on it.
If it says original, you know these are the crappiest charger quality ever, don't come near any of them
0:56 hy
electrocution house burner is now my new favorite word for crappy phone charges
EBH Chargers
Electric house terminator device
AYOOOOO THIS IS LITERALLY WHAT I USE !
Looks like primary and secondary windings are also touching in the first charger. 9:59
You're right, I should have examined this spot closer ;).
I like these dangerous USB chargers videos. It is good that you show these chargers for the death traps that they potentially are. Anybody considering buying a new charger for their phone, tablet, etc should watch your videos before buying anything. I had to buy a new charger for my phone recently and decided to pay the money for a Belkin 60 watt dual charger which delivers 30 watts on each USB C port. It supports all of the necessary communication support with the devices connected to it to set the right charge voltage and current. It would be nice as a comparison if you could test a Belkin charger and tear it down just to show what a properly engineered charger circuit should look like. I love your videos by the way keep up the good work!
186 degrees is already a fire hazard if you happen to have any paper or wood dust in the air.
Well yes, however it would have to enter the USB ports.🤔
@@brucepickess8097 that's the problem with dust, it likes to go everywhere
Maybe it's an in-room flammable gas burn-off feature?
Danyk - you should make some videos about EMC /RFI supression and why buyers should care.
Also a video about Output Voltage Ripple, why it matters, and what level is acceptable
There are so many Amazon chargers that get so hot they can boil water when charging something stupid like a smartwatch.
Damn man, you've been gettin good mileage out of your sisters molten hair dryer.
frfr
Bloody hell can cook a bacon sandwich on that one 190⁰ 😂😂😂
USB CHARger - Use for Smoked Bacon.😏
@@brucepickess8097 🤣🤣🤣🤣🤣
They need to use the most dodgy Lead-free solder in that once, otherwise it automatically desolders itself at high power levels 😂
getting close to desoldering itself/causing some great house burning arcing
It always makes me smile when you say Super Dodgy :D
used to watch this channel 5 years ago, came back and im happy that hes still making videos!
12:48 awesome 'shortcut', nice content DGW, thanks a lot for this vid 🤜🤛
I love to see that Super Dodgy sign.
I guess the second charger is beyond super dodgy. It's more like "ultra-dodgy".
Thank you for these videos! They are awesome, funny, informative and just great
This is why manufacturers should still provide OEM charger!! Over 1000 euros(!!) for a phone and no charger, while 100 - 200 € phone comes with charger and headphones.
Or make it that while buying phone offer OEM charger for 5 €!
I bought 29.9€ Honor supercharger (66 Watts and comes with good cable) not a bad price, but before it came with phone..
I lost my OnePlus charger, so bought an $18 65w charger to replace it and my phone only goes to 30w (its an older phone) and that charger gets very hot. It works fine though, and it's been a couple of years without issue.
Why would you buy phone that costs 1000 euro ?
@@WuTangChopstick I didn't, but midrange phone, like Honor 90 512/12 (I'm replying with one) cost 399€, no charger, no headphone jack, no SD-card.
Someone could want the latest tech with best connectivity and 5 years of updates. Reason just doesn't matter, what comes in the box does.
You, Sir, are a legend...
I love that "Доджий" verdict said in your beautiful Eastern Europe accent😁
Thanks for showing the horrible ripple on the second charger.
That ripple alone may damage your phone and other devices.
Unreal temperature, how long that silicon can last. I have always thought that if I was making something electronic, the temperature of the component above 80-90 °C is fatal. And that is not the case at all. But apparently it brutally reduces the long-term life.
Plenty of silicon can be good to 125 degrees Celsius (that's a standard maximimum specification for mil-spec analog and logic parts for example) and some parts can be designed to be OK as high as 175 degrees Celsius under specific conditions. Lower temperatures that you mention are often upper limits for high-density parts such as modern CPUs, but the silicon can often take more heat, it's just that the timing and leakage current parameters go beyond their workable values. Either way, the design must be able to get the heat away safely - not something that these supplies are capable of.
Its a good day when dodgy power supplies returns
Series is back lets goooo
I would buy the second charger solely for the beauty of the coloured connectors 😄
Absolutely live this series
2:50 It may also be a Y2 capacitor as the Y class is always suitable for mains to grounded or mains to touchable. Often, ceramic Y2 capacitors also carry the X1 designator, but Y1 is more rare and expensive.
" Bloody Hell !" you need to use this more often as it is your catch phrase :)
Haha, 186 degrees celsius, bloody hell!!!
Love this. I am always interested in SMPS because its my work xD and your videos are always nice to see.
Diode grilling party. I love your terminology
Do you want to come on over to my Transformer barbecue?
That second charger is a public health hazard with the mylar film capacitor. Made about as cheap as possible. The solder work on the circuit boards look like it's all by hand, it's too messy looking for a machine.
Nah, hand soldering is too expensive, it’s just really poor wave soldering. Just the LED current limiting resistor looked like hand soldering. But it could still be low-quality wave soldering.
Made in shitty china garbage chargers
Quick charge is a proprietary tech, you technically need to pay royalty on every charger that uses it. Thats why the chips are unmarked.
That's why we moved to lead free solder. Leaded would desolder itself at operating temperatures of modern electronics.
Damn 186 Celcius I wonder how long this charger would take before it explodes!
bladyhel
@@lalasonycierny1945 😂
Haha, I could tell that the second one wasn't going to be very good... The first one was also really nice, getting over 180 degrees C whilst in operation! Electrocution houseburners!
Nice bro, i follow you since first videos, keep it up 🎉
Those not a "dirt and burns" on the table, those are battle scars.
I always enjoy a Super Dodgy!
My day has been lit up like the house that leaves these plugged in
Fantastic video! What kind of thermal imaging camera are you using? Its so small and the resolution is really good. No wonder these chargers are suspiciously low priced when they offer so much.
It would be fun to megger (insulation tester) these things and watch them arc over at high voltage. I think BigClive did it to a few.
On the first one, it's hard to call it "thermal protection" if it cuts out at 190C; that's nearly enough to combust paper. However, it's surprising that the transformers had reasonable separation between layers.
The second one might actually be safer because it can't sustain enough current to bake itself. Failing to reach 2A of current is both a fraudulent claim *and* a safety feature. 680mV PP ripple on a 5V supply is not a useful feature, though, and the transformer is deadly.
Very good video again:)
please can you cook the dodgy capacitor in the second one on 400VAC ? just to see what happens
Love your videos! Thank you for exposing these dodgy chargers.. Wouldn't want my $1000 Iphone to be damaged by that ripple...
I guess the ripple isn't really the biggest problem in this case 😮
13:50 that "Y" capacitor is apparently already cracking?
really happy xiaomi actually gave me the 120w charger packaged with the phone. even charges a macbook quickly, didn't expect that. wish i had your knowledge and equipment. really wana know if it actually reaches 120w
How the chip is not blowing up at that temperature? Isn't the max operating temp 150 deg
Depends on the chip. Power electronics chips tend to be designed to handle higher temperatures.
What about those wall sockets and extension cords with USB included? I guess only the finest super dodgy technology. And it's always connected and waiting for meltdown or to make things electro-cute.
What does Yellow/Violet/Gold/Gold/Black means on the fusible resistor? (@3:03)
I never did learn what these bands mean.
You might find the answer on DGW’s website.
Can you do a video series about vacuum tube tesla coils?
I have seen that you have made some
Interesting way to thermally fuse your crappy power supply: Get the ICs to literally drip of the board.
It has to be a lead free solder, because Sn63Pb37 melts at 183°C
@@DiodeGoneWild I think leaded solder is only used for medical equipment, where lead free solder is explicitly forbidden because it is not reliable enough.
@@mernokimuvekIt’s not that lead-free is unreliable, it’s simply that it doesn’t have a long enough history of use to have _proven_ its long-term reliability. But we will soon be there, I think, and some of the lead-free exemptions are actually expiring (and I think medical is one of those).
@@tookitogo Yeah the unreliable lead-free solder is mostly from devices using the cheapest and non eutectic alloys.
@@oliverer3 I don’t think eutectic vs. non-eutectic makes any significant difference. Again, I have yet to see any real evidence of _any_ reliability problems due to the solder alloy itself. There were _process_ problems early on, but manufacturers have long since figured that out.
I hope you had your fire extinguisher beer nearby during testing? Even I was feeling uncomfortable with how hot those chargers were getting!
Can you take a look at some other Chinese chargers, but supposedly good ones? You know like BaseUs, Ugreen or more recently Essager.
mayve try test phone charger thermal limits external fan cooling.lets how far you could push them with cooling
I'm right with you when it comes safely but I'd just like to note that bloody hot is not a fire
Kindly make video on how QC charger feedback circuit work because it is giving 5V,9v and 12V output
Your advise is sort, I have just purchased second hand RIGOL DS1052E 50MHz Dual Channel Oscilloscope. There is a hack to upgrade to 100MHz is it safe to do so ?
Very nice, I own the first charger (but never used it for anything serious).
When specifying a transformer like this It must be made clear that the auxiliary winding requires extra insulation from the secondary. Perhaps this was done but the manufacturer ignored the engineer’s instructions. Maybe the samples were made correctly but the production transformers were not. Always keep an eye open when having your product made in China.
Hmmmmmm,"manufacturer ignored the engineer's instructions" ??????, so this was engineered ?????, really !!!!!😏
I guess the markings on the second charger only mean that power comes out, and it has a brand. That indicator light would be awesome if it back lit the brand name from the wrong side of the board.
The Chinese don't know what thermal management is, point.
They can build a power supply, but I guess they've never learned about heat.
6:40 😂😂😂 bloody hell! I laughed so much.
that is really hot, i wonder how it didn't fried by being on for 3 hours.
@DiodeGoneWild I have some stuff, including potentially dangerous USB chargers, I would like to send you. Is that possible?
Oh My god, and they are selling these room heaters still?
The C1-118 (S1-118 / С1-118) oscilloscope was produced in Lithuania.
Some audiences might want to see the 2000V primary to secondary insulation test on these dodgy chargers (buy 2, tear down one, HV test the other)
2:04 in the middle there is the optocoupler.
Thank you.
i created an contraption to fast charge 16850 with a power bank board and a two headed charger (that has 2 transformers) and the strain that i knew the charger was going to get made me put a fan, ironically enough the capacitor of the unused side popped but the side being beat to oblivion was fine. but i changed the cap now the unused side works fine again.
Also passive cooling is useless on chargers, but in my case the fan didn't let it get even warm. (the board was exposed to the direct air which is extremely dangerous but i made a new case to it)
It’s the tiny electrolytics that have 400v rating in these chargers that get me. They really need to tighten up on LVD regulations. They run these these components right on the bleeding edge.
What good would tighter regulations do? These already don’t meet existing regulations.
@@tookitogo Does LVD go so far as checking to this level? As far as I’m aware they don’t tear down transformers or check specifications of components are adhered to. It seems to be a basic check done by a local certification company with good relations with the factories. They are tightening up on the GPSR, too many of these devices are slipping through the net with a paperwork CE certificate.
@@JT_2024-c8j I honestly don’t know. But that’s kinda my point: the Chinese vendors don’t bother to comply with even the loose regulations now. They’ll happily slap a CE logo onto some crap that hasn’t even had a cursory inspection, never mind a real-life safety test like UL performs. :/
@@tookitogothey probably don't even know what the CE logo means, but they saw it on other chargers and thought that it was a cool logo to add.
@@blisphul8084 Hahaha exactly!
Why does it get so hot?
where do you get that Usb voltage selector from
Where is Kofola ?
Bir izleyici olarak acaba benim bir ricam olacak senden infinix 45 watt'lık şarj aletini de bize gösterebilir misin onun mekanik içini nasıl yapıldığını çok merak ediyorum.
Thank you
how the transformer tape does not melt at 180c
With that second charger I have to wonder why it has so many USB connectors. Realistically you can only use one of them at a time. Were the designers being optimistic and they figured they'd give you extra so as you wore them out you'd have more to use?
Hmmmmmmm, "designers" ?????, so this was designed ????. Designed - planned or conceived in detail or for a specific purpose. Failed to meet that definition completely.😏
@@brucepickess8097 yes someone definitely designed the product. But those USB ports seem like they are largely decorative to me. They give the impression of power but don't deliver on the promise. It is all a big front. I'm thinking that was by deliberate design too.
You could charge multiple smaller things at once, or large things at a reduced rate. I believe smartphones would limit charge rate without cutting out. Four smartphones would eventually charge up but you wouldn't need to move plugs like you would with only one connected.
180 °C! And that's outside of the box! I can imagine it desoldering itself!!
Ďakujem za ďalšie video z tejto poučnej série, tieto dva kúsky naozaj stáli za to.
Thank U man.
Cracked and poor solder at minute 3:30... nice😂
The second charger was an "original" design alright ... an original, more dangerous supply than usual. But at least it has fancy multi-colored ports!
They could have used the SR502, 3 or 4 instead of the SR510
The other variants have 20, 30 and 40V reverse voltage, which is plenty for a 5V supply, instead of the 100V of the SR510
But also they have only 0.55V forward voltage instead of 0.85V which results in 0.6W less loss at 2A
That would reduced its temperature from 110°C to only 80°C
This exact diode must have laid around somewhere for cheap, there is no reason to put in a 100V one
A flyback converter can have pretty high reverse voltage.
@@sergepetrov8598 You are right. But on the secondary side these voltages are around the output voltage in reverse at maximum
maybe add 10V in reverse to the 5V on the output and a 20V diode should be enough already
The same goes for the input, but since there are voltages around 300V pressent, this means you need at least a 600V transistor for switching
Can you make one which is upto standards,so they learn how to make one .
Look at teardowns of genuine, original Apple chargers. They’re model citizens in terms of power supply design.
Module yg berwana merah namanya module apa?
for second, they looks like misplaced green and blue capacitors. blue must be on a CY place
and of course I really like videos like this, which dig deeper into chargers, and of course don't forget the cats😅
CY and C3 were swapped during manufacture
I'm surprised it didn't auto desolder itself.
Looks like I'll have to look elsewhere for chargers with ports colored like Skittles.
Where are you from dude? Tou accent very different
Very thankyou 😊
180????? how the lead solder dont melt?
Because it’s lead-free solder, so 217-227C.
yes but anyway it start to melt about 150-180 C@@tookitogo
@@mitropoulosilias Uh, no.
Every alloy can be viewed as a base eutectic plus any excess that may be present of a constituent metal. For example, 60/40 solder is metallurgically 63/37 plus 3% excess lead.
This matters because the temperature of the eutectic is the temperature at which the alloy begins to melt. 63/37 tin-lead is a eutectic, so it has a single melting point, not a range. That temperature is 183C. So 60/40 solder, which is not eutectic, is actually a large amount of 63/37 eutectic, plus small crystals of lead. Consequently, 60/40 solder starts to melt at 183C, but doesn’t fully melt until several degrees higher.
Tin-silver-copper lead-free eutectic melts at 217C. Not below.
Tin-copper lead-free eutectic melts at 227C. Not below.
googd. i didnt knew@@tookitogo
The true house fire starter
at least the first charger functioned as advertised
Why would a USB charger/power supply produce 9 or 12 volts? I thought USB was 5 volts.
5V is the baseline voltage. There are protocols (e.g. Power Delivery, Quick Charge) that allow negotiation between power supply and device.
Without increasing the voltage it would've not been possible to safely deliver more than ~15W (~3A).
One year later phone chargers will be
input = mains
Output= mains
And no transformer inside
Super fast charger for human body😂
I love when you say niiicee :D
I love your cat🥰😍
I've seen roots of future tin whiskers under magnification, though judging by my experience, tin is not the major ingredient in most of chinese solders. Some chinese marketing department have found a way out of their stupid idea to produce colorful USB connectors with demonstrated second "product".