Cheap Ebay 18650 Li-ion batteries (test and autopsy)
ฝัง
- เผยแพร่เมื่อ 3 ธ.ค. 2018
- Today I tested another 2 dirt cheap 18650 size Li-ion cells from Ebay, donated to me by a viewer (thanks!!!). This test includes capacity measurement using my DIY battery analyzer and, of course, an autopsy. Can those super cheap batteries be real, or just another fakes?
List of all 18650 Li-ion cells I've tested:
danyk.cz/test18650_en.html
My DIY battery analyzer:
danyk.cz/avr_aku_en.html
You can support me on Patreon:
/ diodegonewild
My Instagram:
/ savage_danyk - วิทยาศาสตร์และเทคโนโลยี
In my favourite top3 You Tubers. (Esp. after looking at his clocks and his cat) - and with so much that made me laugh. DiodeGW is certainly a force among the best of the electronic engineers here on YT. Make no mistake - he has an excellent foundation of knowledge and experience that he shares with great style, quality and humor. Brilliant. I have written a few praising comments recently. I think the effort and time involved and the generosity of the content makers in bringing this new form of media to life, is quite a remarkable thing - thanks to people like DiodeGW. Respect from Martin, a fellow engineer.
My favourite Electrical Engineer on YT is Mehdi Sadaghdar (ElectroBOOM) and I only like DiodeGoneWild because of his accent (If he didn't have that accent I wouldn't watch him lol)
@@nutzboi ElectroBOOM is great, but DiodeGoneWild is not a low voltage version, he is high voltage. He has more electronics experience/knowledge than ElectroBOOM, though Mehdi is a serious physics genius. All round, yes he is amazing. The unibrow .
I enjoy Mehdi’s videos but he tries too hard to be a clown. DGW’s understated humour is just as funny and is more to my taste.
@Diodegonewild has been around waay before TH-cam took off, he has his own website danyk.cz, which I used alot when I got into electronics around '05-'06, when I became interested in hv power supplies and Tesla coils....analog electronics (I've kinda moved to digital electronics), jmartis2, and Steve ward also have gotten my respects...... also check 4hv.org,
Tbh i first though his accent was Indian 😂, because of him rolling his letters so much, then I found out he was danyk.cz
To add, his hate for garbage chinese "products".
The problem with unknown "recycled" cell is that you don't know what happened before. Often they were overdischarged, meaning they've build copper shunt inside the cell leading to internal short circuit and explosion. I discovered this, the hard way. Some of them also don't hold full charge for long and they definitely have much less capacity than before.
@@esecallum Yes you can
Ese Callum reported 😡,can you speak without that words -_-
TIRTAGT TECH reported! Don’t get butthurt by a joke.
China
@@tirtagttech512 Why should he avoid talking about sex? Of course he can if he has a suitable dildo, although vibrators rarely use 18650 cells.
I subscibed as soon as he said 'bloody hell'...
I think the cat also has an electrical history, but it is an asset in your vlogs.
So it is obvious that people like to light you up.
A clear vlog about the batteries.
hey you are discharging it to 3 v but i want to know . is your device measures voltage of battery when its loaded or is it just cuts discharge and measures it to see if it is 3 volts thank you
2014 refers to the year of a Chinese standard. When you read something like GB xxxxx-yyyy it's a 国标 guobiao standard.
Is there a video of how you made that battery tester? If not, can you make one?
I have a lion battery that charges normally but the second I stop charging the voltage drop by 1 volt every second to about 1-1.5 volts may I know the problem? And what is the fix?
@DiodeGoneWild, Where can I buy a battery analyzer like yours?
You should make a teardown video on some RC batteries. Would be very interesting to see how they differ physically from normal Li-ion/polymer batteries.
Diode, Can you make a video about switching mode power supplies again? I'm getting a 12V 2A one.
Hi I recently purchased a 18650 2500 mah battery I charged them with my newi2 nitecore charger and used it In my vape but before u can use it I can see 20% battery has already been drained and plus it heats my vape mod I use armour Pro mod.
Is it normal for a new batteries to act like this or are they clone batteries.
Can you also measure the cell's internal resistance? The old cells - their Internal Resistance shoots up and they won't provide current.
Hello, can u make softstart using Resistor chalk. 20w47r?
Now put them back together and show they still work.
1 Day ago WTF!!! Oh wait you are a Patron...now makes sense.....
@Fracture:
D.G.W. told me (i'm a super-patreon) that he is still attending the applied magic course, as soon as he graduates he will try to rebuild the batteries and regenerate them at twice their original capacity! hahaha :-) :-) :-)
Or just sprinkle it in your coffee, makes a great creamer. xD
Dear Sir
I hope a can call on your expertise!
I have a Boston Acoustics Subwoofer ASW 650 with a faulty power supply.
The service manual shows a transformer based power supply, but the one with the unit is a switch mode power supply!
Does anybody have a circuit diagram for the Smps?
Thank you in advance.
Kind regards
Thanks for the reply, lots of requests for a video on this piece of equipment. Best wishes from Northern Ireland.
Diode! I need you to post a video about this homemade battery capacity tester, and also your homemade watt meter power-bar. It's been forever that I've been meaning to ask.
PLEASE PLEASE PLEASE
Thanks dude love the videos!
If you're fine with text and pictures, see his blog:
danyk.cz/avr_aku_en.html
danyk.cz/wmetr_en.html
He's planning to do a video on these sometime, I think.
@@vaclavtrpisovsky I will now be stuck on his blog for at least 24 hours. Thanks so much man I've always wondered about these "dangeroooos" devices he has created.
Thanks again bud! Much appreciated!
They are on my website :). Somebody above me already sent the links. Maybe I will also make a video about them one day....
@@DiodeGoneWild please do! I wasn't aware of your blog. Lots of very fine projects on there! Keep it up Diode I get a lot of inspiration from your teardowns and reverse engineering. Only you and BigClive make such good reverse engineering videos!
Cheers from Canada!
Plz make a video of captcha fitness and health band you get it on Amazon .plz told me what are the disadvantages of it.
Finally THE CAT is BACK! :)
As always very entertaining and helpful video! Keep them coming please...
I actually don't know anything about battery construction, may I ask is this copper layer supposed to be there?
Yes. It's part of one of the electrical contacts.
Jammit Timmaj thanks. I'm asking because it looks pretty incostistent
I want to make battery pack for motorcycle . Could you suggest me best lithium ion 18650 cell please .
You need Lifepo4, check you m.th-cam.com/video/dSLBwDIx_pU/w-d-xo.html
Good video. I'm starting to dabble in solar and battery tech as a hobby. Will build some battery bundles from lithium cells. Knowing how to spot fakes and used batteries is key. The price variance is huge. As such, a cheap, low capacity, but solid cell might be more economical, maybe? Will do some math after taking some samples. I bought a programmable load that will measure a battery's capacity automatically. Thanks.
Your accent is incredibly strong but surprisingly clear and understandable
I really enjoy those Lithium Battery vids
Where to buy your fire extinguisher..???? love it...!!!!
Your battery videos are very educational. The cat more than makes up for minor focus issues.
The liquid in the battery is the electrolyte. It is needed for the battery to work. It doesn't need to flow out like in the green battery, but the whole system must feel moist. The low performance of the yellow battery is most likely (partly?) due to loss of electrolyte. If you rapidly charge or discharge the battery, it gets hot, which increases the pressure in the cell, and some electrolyte might vent off through the safety pressure release in the positive contact. Also the seal can go bad over time, causing electrolyte to diffuse out even if there is no overpressure in the cell.
seeing videos like this one makes me feel so lucky about having found a 3s3p 18650 laptop battery made out of samsung's pink 2.6Ah cells fo 14€. they seemed legit because even it wasn't a very scientific test (i even didn't plan to test it) i used a 10W led and it lasted about what it should have.
I did similar autopsy with one of an old Chinese mobile phone battery. Similar copper and black strips came out of the dissection. And it went hot too, but it very densly packed..
I had to subscribe after seeing that battery analyser. How can I not subscribe!
Wow, this is quite an informative video! I didn't know about these tricks employed by the "remanufacturers" before nor did I know the difference between fake batteries (I thought that all of them are just hollower on the inside and that's it). Diky :)
In addition to losing their capacity, cheap batteries increase their internal resistance when they wear out. This can be a problem when high currents are pulled from them.
Ta výslovnost je unikátní!! 😁
Czenglish vs Chinglish.
Thanks for yet another of many informative videos! Love your channel.
Love the way your battery analyser says "En" to start discharge cycle. I think thats "Engage, Captain Picard of the Enterprise "
Actually, En means Energy :). The next screen after voltage measurenemt is energy measurement (energy in watthours). When I long press the mode button to activate the discharge, the meter prepares to show the energy value, but then it realizes that a long press of the button is what happened, and it goes back to voltage display. But En could also mean something like "discharge Enabled", so I left the program this way :).
Nice cat!!!! How many batteries does it use?
can you make a tutorial of the battery capacity meter
It's on my website:
danyk.cz/avr_aku_en.html
But maybe one day I will also make a video about it...
I wonder if the reason for the loads of electrolyte was to compensate for the rolls not being densely paced together.
The rolls may be hand-rolled by poorly paid starving workers in China. Then it, of course, needs more electrolyte. The layers are not pressed together enough. There's also a lot of empty space, so the roll can loosen over time or because of the shipping vibrations.
Seldom have I seen such an entertaining yet educational video!
But I really wouldn't touch that stuff with bare hands, especially not the solvent.
10:03 Grumpy Kat gets tired of helping, abandons paper weight duty. Informative. The liquid is the electrolyte, the copper and aluminium are current collectors. They are lithium ion cells, just short of active material or old.
Thanks. Your video are always appreciated.
Make video about your baterry analyser
He made it himself. See his blog danyk.cz/avr_aku_en.html
It's on my website:
danyk.cz/avr_aku_en.html
A video about it may also come one day... And I believe that my one is better than ZB2L3 because my one has a programmable current, and the current is constant during the discharge. ZB2L3 seems to have just an external resistor you can swap. The current declines as the battery discharges.
DiodeGoneWild do a video about how to make one and not just a text instructions.
what was this lanhuage
Thank you for this very entertaining video! Favorite part is when you said you steal nail polish remover from girls. Acetone is the main ingredient in nail polish remover usually. Also next time don't forget to use a fire containment dish.
looks like a dangerous way to dismantle a battery without an real effort to avoid short circuit. He could have at least used non conductive tools, I think he did discharged batteries first. Don't Try this at home if you enjoy your eye sight and general health.
very interesting... I must go and check out some of your other vids..
Ultrafire are very low in actual amp hours. Most othe sellers sell refurbished pullout by using a new sleeves ( heavier ones) and works long and good too. But the length increases due to added cap tip at positive and may not fit easily in many products.
Great vid! Anyone know a trustworthy place to get some hundreds of 18650 in Europe in a proper price? Any ideas? Tired to see all the americans with their bulk offers but in Europe nada...
A co mikulášský speciál?
Hard to believe we are seeing this before our eyes,- old batteries being sold as new :(
No reputable brand, no model, brand new 18650 Li-Ion battery for just $1.30 and you find it hard to believe? 🤷♂️ Do you still believe in Santa Claus? 😂
Heheh. When you say i don’t know, I am dying from laughing 😂😂😂😂😂. Cheers from, Europe.
loved the fire extinguisher beertle
On the worn out cell the yellow one you should have unwrapped it and checked for manufacturer markings to see what it was originally maybe could have been a used Samsung, LG or Sanyo
Leave beer with cat. Kitty will put out fire in case of trouble, no problem. :)
Let me guess, are you from prague?
Your cat is really cute
Love your cat, love your fire extinguisher, shame to waste it on a real fire though
Not trying to be mean but why do you make that weird inflection at the end of each sentence?
Hey! where have you been?! .... we missed the cat! 😉
we need a video about car headlight LED (COB vs CSP, ....) and the actual wattage and luminous, mostly from Ali-express sellers .. i am sure several of them are fake, but i trust your judgment,
.
please make a video about this, it's a hot topic nowadays.
.
.
.
.
Kamel Al-bellihy - unless the replacement lamp is from a vehicle manufacturer or reputable dealer / vehicle parts manufacturer, then if it is fitted in a vehicle, it is likely that the vehicle will no longer comply with the relevant standards or laws.
@@Mark1024MAK thanks for your reply,
the point you mentioned may be a problem in some countries, but not where I live lol :D
@@Mark1024MAK there are who drive there cars without even a number plate hahaha :D
we'd like to see that, please
I was waiting for a big Clive moment lol
You know, I love to test all 18650's too. There are a couple other guys who do it as well. We should start a website with videos (I am hoping to get a video camera for christmas) with load testing of every brand/color we can find. Then, make a database where people can see for themselves. I would be willing to put in the work, let me know.
Then, scammers will be held accountable right away, good mid-price batteries will sell well, and batteries will get better, faster!
I hate the button top ones. I've came across some horrible batteries like these.
It would show a full charge on my vape, but when pressing the fire button, it would say "Low power".
All new from Diode gone wild lithium batteries Good job on pronouncing it how do you stay safe in doing that ?
He doesn't. 😂 I was waiting for the cathode material to go on fire...
Probably big clive does it safe ish, but this was kind if scarey. Lol
Good investigation ! 👍👍👍 !
with bare hands... what a man!
Diy solar mobile charger please
i suggest to make videos about cheap bleutooth speakers
lmao! good fire extinguisher. you got another subscriber now :-)
Looks like a crazy party!
Tohle je přesně věc, u které se vyplatí si připlatit a nekupovat nějaké, skoro mrtvé, jinak 18650 jsou super akumulátory, které vynikají svou univerzálností a velikou kapacitou (pokud jsou nové)
Díky za video, dávám ODBĚR A ZVONEČEK :-)
"i sometimes steal nail polish remover from girls"
holly kek hahaha
That cute cat !!
I like that the cat as soon as it heard that it heard that you wanted his/her help nonchalantly ambled out of the danger zone. Could we know your feline friend's name, please?
great Job sir
Very good. Knowledge you shareing
My new favourite Czech film.
Check out the duracell powerchek battery
Cat loves the beer
You missed to measure the length and the surface of this piecees of 'copperpaper'. Also their individuell weights would have been interesting. Maybe you should consider to repeat this test in some future. Maybe we find out even more and new things today.
And they say, that lots of different prescious metalls are in this copperblend. Maybe it's as well possible to measure and calculate the specific weight. We know the surface, so we only have to measure the thickness as well properly. Maybe it would be of some interest anyway to know the thickness of all such samples, they may not all be the same?
Pls do more I will support you always😇😇😇
Useful video 👍 very nice
I love your cat!!!😍
I like your fire extinguisher....👍
8:11 Anyone noticed the spark?????
No... Only you
wow , thankyou for that,i had no idea
Useful copper foil for repairing tracks on circuit boards.
Make a video about how to make the battery analyzer. Not just the text instructions on your website.
Maybe one day :).
DiodeGoneWild please do it because i want to make it but I can’t follow the text instructions on your website
DiodeGoneWild because I can’t actually read a schematic that complex like your battery analyzer shematic.
Good work . thanks
So the reason why the 1800mAh one was so poor (1100mAh) was because it was specifically made/designed to be low capacity, there was not enough material inside to be of decent quality or capacity. The inside was hollow...
And the reason why the 2400mAh battery performed so badly was because it was a recycled cell, probably from e-waste, where they take the battery pack, disassemble it for the 18650s, and then they just re-wrap it, shove new contacts on, and sell it to you. Under those circumstances it really is pot luck as to what capacity you will get (the previous UltraFire recycled cell was 1500mAh).
A braver man than me!
I use a lot of these used batteries in flash lights and they work fine. I charge these cell's on a slow charge no problem.
6:30 hahahaha, not me, they sold to YOU😁
Hahahaa ... Premium Fire extinguisher :0)
What do you mean it's not a good idea? It just needed more salt!
1:26 Don''t puncture. Damage. and disassemble it ha ha 😂😂😂
Dude your cat is SICK
Where is this accent from?
8:27 Aw, look at that, the cat is sniffing the fire extinguisher! Maybe they want it instead (assuming that it isn't needed to put out one of the Li-Ion cells if it goes in flames).