$1 USB charger teardown and test

[@TimoBirnschein]

It would be awesome to see a scope attached to it and maybe how it reacts to input voltage variations...

[@ma_astro]

Thank you very much for this breakdown. I was dying to know what was contained within and my questions have been answered. Excellent work!

[@TheTrueVoiceOfReason]

John, I've found that if you use a white LED light (such as a cheap Dollar Tree flash light) l, the lettering on the chips really stands out. Not exactly sure why, but that phenomenon can be seen quite well with street signs roo.

[@MrBrymstond]

Imagine what you can get at the $2.00 Store. Maybe a 2.1a :-)

[@MrFrazierNation]

🤣🤣 right

[@jimechols4347]

Awesome video! Thank you for showing people how chargers work in a technical sense and showing us what the inside of these chargers look like so we don't have to break our own open.

[@U4184]

Love what you did there. I am a 1970s graduate of NRI and have one of these wall chargers I want to tear down and repair if nothing major is wrong. Thanks for video.

[@karlh.peterson8134]

HI! I wonder how much switching noise gets through. It doesn't look like they have put much effort into noise suppression. If you care to check, it might be interesting to see the noise output on a scope either time domain or FFT and then vary the load. Also, I especially like the solder blob on the mains side diode or whatever it was, looks very nice indeed ;) And finally, although it's hard to tell from the video what is the approx. creepage/clearance between the spark gap but It looked huge like 8mm/.3" or something. This would suggest the board material is from the cheaper PCB CTI group III or worse and even then 8mm is out of spec, should be 5..6mm~1/5inch for 4kV transient which in turn is again of high rating. You only need to use that charger once during lightning to blow up your $500 schmartPhone, right?

[@nathanielaranda8407]

I bought 2 of these on my vacation, obviously I was on a budget. I'm surprised how well these things are made of how much they cost :)

[@mpingo91]

The iPhone is also worth one dollar, but they don't tell us about it. :)

[@tonykeltsflorida]

I just ordered 36 of these on the dollar tree web site. The stores here do NOT sell them.

[@hellhound-si5oz]

Little seven amp hour battery and get a little power inverter you can get 150 W pier sine wave inverter for go power

[@mtrltoolman]

nice testing video 👍. i got lost in the understanding class AB amplifier the way the current goes through the circuit can you help me?

[@nox5282]

Why didn’t you show how you actually opened it, that’s the only reason I was looking at this

[@ricardoelectronicsrepair]

wow 1 dollars for very good circuit board inside, here(indonesia) it like charger that cost idr100k ($6). US is so far from China to export only cost 1$. i dont understand. as comparation legal distributor iphone smartphone here cost 3 times as much

[@hemhemchannel9978]

Biasa bang . Kemahalan bea cukai wakanda .... Apal kan 😅

[@arricammarques1955]

Houston we have a discount!

[@CrisanBogdan]

Captain, I have two questions for you: 1. Do you have a video where you explain the test setup you used for this test ? (the load and the inverter) 2. The inverter is for galvanic separation?

[@JohnAudioTech]

I plan on making a video on it at some point. To answer the second question: Yes.

[@stephanc7192]

+Peter Oakes did a realy nice DC load. kzbin.info/www/bejne/eKa8c2ynha16hLs

[@OneSlap]

You know it's good when the inside has some protection cover

[@StewieGriffin1901]

How'd u take it apart

[@mifo1133]

i wish you test more from aliexpress and link exact product to buy for us :)

[@JohnAudioTech]

If I can earn enough from monetizing, I will start to buy more things from these sites for reviews.

[@Davidmormino]

That charging brick looks like one that you'll get from a cheep phone

[@Mayala285]

what the hell thats the same charging brick that came with my mom's phone that im using right now. huh

[@aprilfinney2689]

How did u take the top part off would have been great to see how u did it thx

[@soonersciencenerd383]

not to be sarcastic, hammer and chisel. i cracked open several of these (lenovo, no-name, ) and they had the same stuff inside. some have gold contacts, others have brass contacts. i removed the components for other projects.

[@daijoubu4529]

Usually any charger sold in N.A bearing the ETL mark should be legit unlike Chinese junk from ebay/Ali

[@soonersciencenerd383]

all the cell phones that i use up (no more time, ect,) i scrap the WHOLE thing. remove the battery, gold, motor, gold circuit board, silver contacts under the buttons- open the charger block, unsolder the components for other projects,

[@AstrosElectronicsLab]

"Rat shack" lmfao

[@grandrapids57]

great video!

[@RandomSTUFFzors]

Ok, so the charger lives up to its rating. Does it have a FULL BRIDGE RECTIFIER!!! in it, though?

[@mjouwbuis]

WHY ON EARTH would you worry about that when there is lots of higher priority design details that will make more difference? And yes, you can see the bridge rectifier clearly in the solder side shot around 3:05

[@0x8badf00d]

It does make quite a difference. The reservoir capacitor would need to store a lot more energy, or it would cause severe 50 Hz ripple on the output.

[@daijoubu4529]

Efficiency VI is actually the highest lol

[@frederickgarrett9242]

I wish people stop opening up charges and battery packs and stuff just show me do a charge fast and where do you get it from I don't need to know what's inside

[@Semialfa]

Samsung & iphone chargers are worst on the inside