Clever but Dangerous 18650 Li-Ion Cell Charger (for $1)

Test and teardown of a Li-Ion 18650 battery charger from Ebay for just $1 including shipping. It's a very clever design, but it also is quite dangerous.

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[arnold]

This is probably the best unboxing video I have ever seen in youtube.

[elliothunt]

Well done for investigating theese dangerous products (that manny people use daily) i admire your effort in reverse engineering the whole thing

[mrjohhhnnnyyy]

Well done, I like when you add the explanations.

[CathySiegert]

for 1 $ the transformer looked very nice to me. In some USB Chargers, there were transformers without any isolation and they cost more than 1$.

[Gameplayer]

Terminator also clever, but dangerous!

[PhilXavierSierraJones]

Great video! Despite your strange accent on each end of the sentences, I was able to understand everything you said thanks to your detailed explanations! :)

[swsaber]

Hats Off To You Bro To Your Patience to Draw Reverse Enginered Schema.

[ModifywithManoj]

I purchased this charger today and then I saw your video 😂

[PiratCarribean]

I got shocked by on of these. It went flying across the room :)

[Hafiere]

You just made me very nervous since I just got a few of those chargers. I'm currently looking for a replacement. Thanks for the info!

[harrymartin]

You are very good. Thanks for all this work!

[lightningdev]

Best Inglish Evar (I'm serious I like it)

[nikh]

I just took one of these apart. Google knew what I was looking for when I searched "jia-xin charger". It's in the same housing (with a US plug) but with an updated board with a date of 2022.3.28. Other board markings are XC-018L and NB1386. It's even more minimalist, without the charging IC, just a super basic zener diode/optocoupler voltage regulator. The isolation distance is nonexistent, maybe 0.5mm between high and low side. It came in the package of a green DPSS laser pointer of unknown provenance with no IR filter, along with a suspiciously lightweight 18650 battery. The triple threat of blinding you, electrocuting you, and burning your house down.

[jagjitsinghsalujasaluja]

At beginning I was interested to understand this charger but after one minutes I felt in love with accent

[gadgetboy]

I like tiny Transformers, I had one that turned in to a car

[peterthepeter]

Even forgetting about the whole charger thing thanks for explaining how these black magic single-transistor SMPS work.

[TheDIYGuy]

I really like your reviews of deadly chinese mains powered crap. Oscilloscope readings of these switch mode supplies would be interesting

[mattikaki]

Thanks for this presentation. I just warned people in my FB profile not to buy this one and after this, I’m glad I did. This was really awful and I didn’t expect this bad construction.

[-yeme-]

clever, dangerous, a dollar. that describes a lot of electronic stuff Ive got from chinese ebay sellers over the years.

[jeffreystroman]

Thank you, it is nice to to know there are others out there, I don't feel so alone after watching this.