Inside a fake "10400mAh" eBay USB power bank.
ฝัง
- เผยแพร่เมื่อ 12 ก.พ. 2018
- The most annoying thing about this power bank is that the physical structure of it is great. It supports the four 18650 cells well and has a nice PCB mounting system. The battery wires have good clearance and it's altogether quite rugged. Shame about the capacity and the way the listing assured it was a "Guaranteed 10600mAh capacity". The whole unit is probably capable of being a much better power bank when built with decent components, but in this form it's clearly been made to look the part and cater to the fake specification market. On a plus note the cells do at least appear to be real 1000mAh ones and not a mixture of real cells and weighted cases.
By request, a generic eBay search link for the little plug-in USB flashlight :-
www.ebay.com/sch/i.html?_odkw...
If you enjoy these videos you can help support the channel with a dollar for coffee, cookies and random gadgets for disassembly at:-
www.bigclive.com/coffee.htm
This also keeps the channel independent of TH-cam's advertising algorithms allowing it to be a bit more dangerous and naughty. - วิทยาศาสตร์และเทคโนโลยี
"If something looks too good to be true, then buy it for the entertainment value." That is a wonderful life motto.
I lol’d 😆
That must be what the voters were thinking back in Nov. '16. In which case we've sure been getting our entertainment dollar's worth.
Paul Drake very true, it's been quite entertaining...in the worst of ways.
I usually haven't got that much spare change to throw around, so I have to find cheaper entertainment.
Also Making more scammers
The use of a large printout of the board is brilliant 5*
Hehe I looked away from the screen and looked back just as Clive was zooming in and I thought, wow that board is huge.
Robert St-Lauent What printer do you use? Quality looks fantastic.
Colour one. :D
Simon Ashton
Knowing Clive, it's probably relatively old and has been hacked to use buckets of ink instead of the ridiculously priced cartridges!
Actually he has a video about his printer with huge ink bottles.
I've seen ones with Duracell batteries inside that still have the branding on
Hello Cromwell 👋,when did tanks get access to phones?
@@nikolabozinovski2041 for a while actually I know multiple other tanks
@@Joopyter724 noice
After watching this video I got myself the exact same one and found two of the cells were filled with sand , eh you've got to laugh.
No i will not laugh cuz i feel bad :(
That's why I will never buy nothing on eBay
@@EmanuelLopesS2 Why not? Then you can make hilarious videos of you disassembling them XD
Emanuel Lopes you can buy on ebay safely, these bogus scams you can just open a case and you will win. Most likely you have to return it, but if the seller doesn’t provide a shipping label or doesn’t respond it will literally be yours to keep for free.
"10400mAh powerbank" ... "Guaranteed 10600mAh capacity"
Retrograde Studio I noticed that too
🤔
Marketing taken to the next level.
Inconsistency between the product title and description is never a good sign of quality assurance.
This is "the upsell" where if you click through to the description you suddenly end up getting a better product (spoiler: it's the same product)
When I see Chinese products advertised as [UPDATED] or [NEW VERSION] I always shudder. It makes me think that the previous version was crap and that is why they had to update or revise it! I would rarely ever buy one of those products, just because of the wording, even if the product was rated well.
When I was in Shenzhen two years ago, these were all over the markets. They cost around $1 USD with no cells. Strangely (though not unsurprisingly), even without cells they had 10400 mAh permanently written on the case. Put whatever cells in you want and through magic, it will be 10400 mAh!
Chinese mAh mind you
Kinda like PMPO watts, eh? :P
Because it Is made after a real Xiaomi 10400 mAh bank
Could you buy them in small quantities or was that price only for large orders?
That was in quantity one - most of the stuff in the Shenzhen markets are available in sample quantities; If you want more then you can strike a deal for cheaper prices. Well worth the visit, and TONS of LEDs!
Thank you Clive you have re-invigorated my interest in electronics. Merry stuff and a happy new year!
I think I just stumbled upon my new favorite TH-cam channel by chance! SSOO EXCITED!
All my life I've been searching for a chili pepper shaped USB power bank....
www.ebay.co.uk/itm/8800mAh-Portable-Emoji-chili-Cartoon-External-Power-Bank-Battery-USB-Charger/263393341971?hash=item3d53777213:g:LykAAOSwhpZaM58Q
all my life I've been searching for something, something never comes never leads to nothing
Nothing satisfies but I'm getting close, closer to the prize at the end of the rope
Fair play Clive you produce some top quality macro shots
You should read audiobooks for a living. Your voice is so soothing
I had for several years one EXACTLY the same apart from the marking; it was marked 5400 mAh.
It served me well until one of the cells died. I took it apart and kept the good cells.
Together with one other cell from another powerbank where the electronics failed I populated a powerbank from Banggood in which you can exchange cells and they have now a second life!
So the cheap powerbank was a good investment after all!
Good for you mate👍
I see exactly the same model with a generic name
The model i read in the box was KT-029 with fake 20800 mAh
Just take care and never use/charge the thing unsupervised because you should never mix and match Liion cells, especially not dodgy Chinese ones! They have differing capacities which will lead to one of them being deep discharged, which is bad news!! It's best to populate the powerbank with cells from quality brands like SONY, LG, Samsung or such, and always use brand new ones from the same production, i.e. they should never differ in age or remaining capacity. In other words, you "marry" new cells together for the intended use. Source: am a vaper and try not to incinerate myself ;)
holy cow i skipped thru the video and i saw that huge print out next to his hand. my brain stopped working for a sec lol jeez
vincent chew lool i was just very confused right there! till i figured it out!!!😂😂
I like how I watch these videos when i'm half asleep. Can't understand a word
Two years on, you accustomed to his voice now?
@@f.f.s.d.o.a.7294 Haven't really watched any of his other videos so guess not.
@@babyroxasman Fair enough. Cheers.
I learned so much from this simple vid. Also your voice is very melodic and easy to listen too while I learn.
Thank you for the video! I was having trouble falling asleep each night, but not anymore. You have a calming voice that sould make you money reading bedtime stories.
The design of that bank is almost identical to that of the old iPod Mini, with the end caps and sliding drawer-like design. Nifty!
I have the genuine Xiaomi version of this usb power bank. Xiaomi put out videos showing you how to verify that you have a genuine one, as well as there being a scratch panel on the packaging with an activation code you put into the Xiaomi website to verify your serial number is genuine and has not previously been activated/verified. The genuine one is superb quality, best power bank I have ever seen
How much does it cost?
Chuckiele for 10,000 mah it costs 18 dollars
Thats nice.
Furious Fist what, no way
I got the 20000mah Xiaomi for around 25$. Working since 2 years, have had no problems :)
Very informative and thorough (as usual), and more or less entertaining depending on your interests. Thank you for the lesson!
Good autopsy and analyses of the device. Keep up the great work Clive.
That capacitor marked CLX on the schematic seems really strange. It is right across the shunt switch and the flyback voltage. I wonder if it is really there?
It is a snubber, but is also the linch pin, it eventually fails and causes the chip to short out in the charging section. Saw this happen on one of my power supplies.
I bought the chassis of one of these on eBay (no cells = cheap) and put my own good cells into it. I noticed the strange charging too and luckily enough my one has spring terminals so the batteries slot in, so I charge the cells in a dedicated 4 way charger.. much faster and better for the cells too. The boost circuit works great so I keep it around still
Me too, bought 2, put cells in from a Ryobi drill battery that had a failed charge controller. 8400mA capacity, been used loads of times and traveled all over the world. Charging is a bit slow from empty but I'm not in a rush.
The empty packs are great value. I had a bunch of salvaged laptop 18650s and got a couple of these. The slow charge is a pain, but I usually leave it go over night. Good travel packs.
Me too. That's the way to go. I use batteries from disposed laptops. Typical capacity is 1800 mAh. Not great but at least I know what to expect from them. For my powerful flashlight I have expensive Li-ion batteries of great quality - $28 each (18650 protected)
Thank you Clive. Another superbly presented and informative video from you even though I've only just picked it up two years after you posted it! I'm always amazed how manufacturers tool up for such a great product presentation yet fall short of the mark with cheap components. It's the same with cheap workshop tools too. I have to smile though as all these power packs are rated in mAh rather than Ah. I suppose that stating 10400 mAh appears much more impressive than 10.4 Ah :-)
I've only just subscribed to your channel, and it's my ambition to watch all your videos. My word, there are so many!
Mah is just a standard unit of measurement, even the batteries themselves use the same unit. It's like that for everything, phones, chargers, watch batteries, AA, AAA, etc... Most batteries are < 1Ah so it wouldn't make much sense to use it, that'd be like saying humans are .001 miles tall, just too big of a unit for most batteries. Mah is the most common so they're at least doing a good job keeping it consistent, besides that most people don't even know what the number means so measuring in amps instead of amps would just confuse them, they're expecting to see a number roughly 500-20000 so if you sell it as 10Ah, they're going to be confused and assume the capacity isn't listed for the specific product. You can blame it on the intelligence of the average consumer, not exactly the manufacturer's fault people don't know their metric prefixes...
Based on the recommended videos, I can see this channel is worth a subscription. Down the rabbit hole we go!
The design of it - the aluminum case with rounded sides, the interface plate, even down to the layout of text on the spec plate - is a rip-off of a series of popular Xiaomi power banks. I have a number of the original ones and they're truly excellent - quality, high-density cells, efficient boost circuit, etc. The fact that they really are excellent is of course why there are so many lookalikes out there. Quite a few videos exist here on TH-cam about how to identify a fake versus an original Xiaomi.
Xiaomi power banks actually tend to *understate* their capacity and list it as watt-hours as well, which is really nice. (They're not the only ones who do that, but they were the first power banks I encountered that do.)
And the Xiaomi is a blatant copy of the Aukey Quick Charge 2.0 10400mAh, one of which I've had for almost 3 years now. ;-)
The Aukey is actually an awesome little power bank. It fully supports QC 2.0, which is perfect for my old QC 2.0 compatible phone, and it also supports it on its own charge port, meaning I can recharge it very quickly with the phone's original charger.
Furr Bear I like your comment, I have a spare battery like these that’s 8000mah. The model I have works well and was able to charge my tablet decently well.
P.S. Why is the US flag in your profile pic upside down? According to the way it’s supposed to be handled, the flag hanging upside down means distress or emergency. I hope you aren’t trying to be disrespectful on purpose. Something you should know.
Sorry, you have that back to front; here's a review of the Xiaomi 10400 from *four* years ago: th-cam.com/video/daKPjv_LaWU/w-d-xo.html
Another point in this is that Xiaomi is the one who had to start putting authentication codes on the packages of their power banks because of the clones; reputable companies like Aukey followed the Xiaomi's style cues because of their popularity. th-cam.com/video/obYhTgzEVP8/w-d-xo.html
I stand corrected, I did not know that (don't tell anyone that someone on the internet actual admitted to being wrong, it could end society as we know it!). I don't think I'd even heard of Xiaomi back then.
Aukey's addition of QC 2.0 was the killer point for me though.
Steve Evans: Not surprising - Xiaomi has focused strongly on the Asian market from the beginning; most people outside the area hadn't even heard of them until the past couple of years despite the fact they're a top 5 smartphone maker globally. (They're huge in China and India, for example.) I discovered the brand because I'm fond of exploring China-based retailers like BangGood, Deal Extreme, GearBest and so on and I kept seeing "Xiaomi" all over the place and got curious.
JetStream90: It is an expression of distress over the current vile occupant of our White House.
WOW!!! That's a really big PCB :O
You'll need a macro USB connector for it!
Cezary Splawinski no big Clive has tiny hands
Great video! You have a new subscriber :) - Keep up the good work!
Was sent by AvE. Fantastic content, don't know how I missed you before, but you have a new subscriber.
I thought the picture of the circuit board was just a really big board
I want to get one of these but instead of charging it with 5 volts I'll use 120v wall current. That way I can get 24 times as many milliamps out of it. I bet it would power my house if we lost power in a storm. ;)
What? I really hope you're kidding.
Francois Molinier you would have to keep changing polarity 50 times every second. Well at least it's not impossible. And you should go to the uk, 240v would be twice as many energies inside the battery!
Gavin Sauer More power in to the batteries, more power out!
Nah, hook it straight up to the utility pole! You could power the whole block!
The chip couldn't handle them so magic smoke breaks out..
I really like this fella, his reviews are awesome and very educational. Top Notch!! 😊
How did I just find this channel? It's great!
I had this exact one a few years ago except I bought it from a store called marshals here in the US. It actually wasn’t too bad lol. Would charge my iPhone 6s + like 2 times
That looks like a knockoff of the Xiaomi 10,000,mah power bank that uses 4x 18650 cells. The legit ones are pretty good.
Remember 18650 is a Size+Voltage, doesn't mean these are "fake" 18650's. I'd still say it's cheap. I could use those from the vid in my vape.
I wouldnt do that with shitty cells, unless your vape is high end and has voltage, current and temperature protection. Also for safety, is better to ahve less capacity and use safer LiFePO4 cells isntead of the regular LiPo cells.
You are a man after my heart, I take apart pretty much everything I get in. The main reason is to discover planned obselesce circuits. That same circuit is in a 20AH Black Friday pack I got on clearance from Menards except it delegates charging to a separate chip so it charges quicker.
Very educational and I found it very enjoyable as well, good work!
Rule of thumb with any power bank: If it's completely unbranded, it's probably got something to hide. Though you may have some brand loyalty, I'd trust an Aukey, Anker, RavPower, etc long long long before one just advertised as "2000000mAh power bank".
"If something looks too good to be true, then buy it from the entertainment value!"
-my new motto
i think this video was the first one i ever watched from this channel ... and introduced me to a whole new for me undiscovered youtube universe ... :D
Dang, I heard you say it was a photo and yet still my eyes were convinced it was a real giant sized pvb. BTW, that is one of the single best ideas I've seen on YT in quite a while. Subbed.
Ah a fake Xiaomi.
Real Xiaomi work really fine
fake asus zenpower
a copy copy powerbank get it,get it?
evoGage Kodak also has a power bank similar to that, the shape is identical, it's also 10400 mAh but it has 2 USB ports and the power button is really similar too. I have the Kodak and it's great, but it wasn't cheap it was about 80-100$ I think. I have used it for 3 years now and it's still going strong.
yeah my friend has one and theres a Mi branding on top
5:52 I looked away from the video for a minute and then looked back, I was briefly surprised by his tiny hands.
I enjoy your videos you do a great job at explaining everything you do
great vide Clive excellent camera work and very knowledgeable with electronics.
It's weird, i have an ASUS one, it's EXACTLY the same design. Makes me want to check the cells now :o
Asus is a legit brand, I can guarantee at 99.99% accuracy that the cells are real. You might want to get one of those USB power meters. I did and it's super great for checking current draw and capacity. It even takes multiple inputs like micro USB and USB-C.
i have one of these from a major reputable chain store in Australia. It is stamped 8000mAh on the bottom and advertised as such, yet on when i ran a number of load tests, it only just goes past 5000mAh. Ripped em a new one and got it for free, and still reported them to the ACCC.
Agree with the above replies... however reputable shops selling consumer gear should be listing the Ah at the socket, not at the cells. A consumer doesn't care if it's got 4x18650 cells or a car battery. They just care how much 5v comes out.
I agree if this was adopted early . consumers are too derpy to care.
Really what matter is WH out at the jack. with QC3 on USB-C at more then just 5v . you really cant going forward just assume 5V and state output AH. WH is more absolute and means the consumer just need to know how many watts a USB-C device is and how long it needs to run , the fun math is hidden. .;. EG a 5 WH batt in a tablet can be charged twice with a 10 WH power bank. ( remember this is worse case OUTPUT after the DC DC WH ) not the internal cells rating .
Was it Kmart, cause I bought one in silver that's almost exactly the same.
Ya these days "reputable" stores also buy directly from China and they really have no intention of testing what they get, they just rely on most people not noticing defects.
Wow you went deep! Great video.
Thanks Clive, that was an interesting look inside.
This is a knock off Xiaomi powerbank. The original ones are real capacity. The model i have (a bit slimmer and longer so probably not 18650s inside) support QC2.0 so its quite practical. You should take one of the real ones to bits but they are a bit pricey and hard to find originals.
TheRandomMan ihome makes the exact same ones. I was worried when I saw the thumbnail.
they are 18650s . yeah 18650 are 3.7v. If hooked in parallelx4; at best would be 8000mah or less. If they arent high drains then it would really suck. Or, they are in parallel and series making it 4000mah or less at 7.4v regulated to 5v.
depends on capacity of the cells, there are NCRs up to 3400 mAh, but they are a little special and you have to drain them down to 2.5V to get all the juice (and they cost way more that the crappy 2000mAh ones). Also that capacity is at the rated 3.7V (when you output that to the phone, there are losses from the conversion 3.7 to 5V and then again loses at the phone to go again from 5V to 3-4.2V while it's being charged). Some xiaomi charger have that printed in the label, both capacities at 3.7V and 5V.
the shell is from a xiaomi powerbank, they are high grade chinese power bank,i have one with the advertised capacity but look like you have a unbranded one fake one
Tailslol how can you tell it’s real, I have one I brought it for 20$ at ross
purchased mine directly in the xiaomi site...
you have too some official retailers like gearbest or bangood.
@@Tailslol Hahaha. Same factory..
I wasn't really that interested in the charger but I just couldn't leave because I love listening to your voice and the way you talk! Haha
Hi Clive, can you test a current drawn from battery pack when board is in stand-by/idle mode? It quite handy to know how quickly it will self discharge... And also what about over&under voltage cutout threshold? ... As you mentioned low current application like running an esp8266 or so... Thanks!
Thats why ï have an xiaomi MI power bank
It's being sold as a 20.000mAh powerbank but it said that was the PACK power of the cells
The true capacity (also stated again at the back) is 14000 given..
Although I measure around 14500 15000 what in my opinion is absolutely awesome!
I can charge my phone around 9 times when not fully empty and 5 or 6 when full
This thing is a beast... It's quite big, and heavy... But it's awesome! Totally recommend!
Only real downside.... It has a QC3 output... But it charges @5 volt 2A in the beginning... But 5V 1A when half full... Thats the only issue but totally fine when leaving it charging overnight.... And somewhat during the day 😂
That's not the fault of the charger. That is the phone behavior. The charger is ABLE to give 2A, if the phone requires. Lithium batteries are charged at CC/CV, when the CV regime kicks in, the current will always go down.
"still chaaaarrrrrged" xD
Amazingly similar to one I fixed this weekend, but some internal differences. Mine has flat lipos, not 18650's, and some associated changes to the drawer.
I'd be curious to find out if this is the Xiaomai battery or a closer copy of it.
Very informative. I use a number of power supplies for various things and was wondering what the differences are between lower cost units and quality units.
Imediately I saw, those 18650 Samsung cells are rated at 2100mAH.. 4 in parrellel only 8.4Ah. What a rip off haha! Not to menton they are only 3.7v nominal so will also need a step up! How companies get away with this is beyond me :(
because not enough people complain, we just put up with crap ;-)
I'm terribly sorry, I don't quite understand what all of that info means, could you explain this in words that someone with no electricity knowledge whatsoever? 😞😖
lostskull7467 think of it as buying a gallon of petrol, but you only get two pints. Your still paying for the gallon and your can looks full but it not. You will only ever get two pints worth of miles.
"Sand filled cells" 3:06. Please show us a sample of sand filled cells.
Edit: I found this th-cam.com/video/hu8aM1B3qgU/w-d-xo.html
gwc1410, yes, seeing the cell cut apart and dump the sand would be a great thing to see!
gwc1410 Thanks!
You sir are a smart man great video and you now have a fan from the states
Your voice is very addictive i kept watching yr vids non stop
I would buy one of these for the case and install much better batteries.
Never mind the circuit is lousy so it isn't worth buying even for the case and the circuit board. I have really good ones that I buy that usually never drop below 5 volts until there is over two amps of draw.
Im quite sure that the circuit would hold the 5 volts if it didnt have so shitty cells that cant output enough current, but you never know without testing.
Get the Mi(Xiaomi) powerbank instead. Same design way way better quality
Its knockoff of the Xiaomi Power Bank 1... The original is excellent quality with LG 18650's and cell temperature monitoring and output short circuit protection... (Yes I have it since 2 yrs and I tore it down and it is still working fine..)
Love your angle! Good show!
I didn't need to know this and didn't understand most of what he said.
But his voice is so awesome, I'm subscribing.
It's a clone of already a Chinese company Xiaomi
Chinese doesn’t mean bad.
You said that as if no one knows what Xiaomi is.
MAXYMOK just because they're Chinese they don't make clones
I have the original Xiaomi product of which this is a clone. Nice to know the Chinese are copying other Chinese designs now, instead of just the west's products.
Me and my wife both have Xiaomi phones. Poco and Note 7. Both phones are great and battery life is amazing.
It's just bad luck Clive you keep getting the crap ones. By the laws of odds one day you will pick up a power bank and it will be 1000 Giga Amp Hours.
Clive buys the duff ones so we don't have to!
I choose the bad ones deliberately because they're more fun to explore.
I really love your manner of speaking.
Excellent video. Well done!
Can you change the resistors to get it to put out more current?
The limit will be the switching current of the chip, size of inductor and ability of the cells to deliver the required current.
bigclivedotcom; And of course the 'magic blue smoke' holding capability of that chip at elevated temperatures. XD
It's kind of like a gas cylinder, you see. As the temperature goes up, the magic smoke wants to expand, so the internal pressure rises. Concurrently, with higher heat the chip packaging starts to become weaker. At some tipping point, the gas pressure exceeds the ultimate tensile strength of the packaging and the internal containment ruptures, letting the smoke out, which obviously causes the chip to lose its magical capabilities.
Heatsink and inductor mod? For science, of course.
+MRLT Best explanation I've seen.
Juan Herrero Chip most likely has overcurrent protection so it wont output more even with good cooling
Woohoo First! 😄
I have a Xiaomi 10000mAh power bank, it wasn't cheap and appears to be the "full monty" I haven't pulled it apart as that would destroy it. I started to but decide it wasn't worth the risk.
The Xiaomi brand provides special labelling on their products to prove they are genuine not fakes. I always find that amusing, a Chinese company providing a way to check if they are genuine and not a "Chinese" knock off. Don't you just love the irony! 😂
Irony? China has 1.4 billion people. 1.4 billion individuals. They make pretty much all your nice electronics, as well as cheap crap for markets with less money, and lower standards for marketing and quality control. It's not just a couple of guys in a shed, making both the Xiaomi power banks and the cheap knock-offs and then passing one off as the other. Sheesh.
Where did I say or imply that I was laughing at the Chinese people, country, or their products.
"It's not just a couple of guys in a shed, making both the Xiaomi power banks and the cheap knock-offs and then passing one off as the other." Did I say or imply this? No! That's your interpretation of my comment. I like Xiaomi products and find them to be well made for the price point. I know China makes most electronics and can make them to a high standard as well as making things to a price point.
The "IRONY" is that the country that started off making CHEAP COPIES of other countries products, now has to protect it's own better quality products being COPIED with cheap knock offs made locally, Chinese companies have to protect their own products from Chinese companies. Hence, the "IRONY"
I'm not insulting them, I believe China is going from strength to strength and I have great respect for their industries. I am old enough to remember when Japanese products were a standing joke, not a by word for quality. The Korean car industry is following the same Japanese pattern, and then it will be the Chinese. I own a One plus 5 and its a great phone, as good as the Samsung's I used to buy.
Save your lecture for someone else! You need to take a chill pill mate.
Ya preach on brother. Anyone who doesn't believe that they copy their own countries designs should just hop on ebay someday.
He never said that he didn't believe that they do, the post was POINTING OUT that they do, hence the irony. Have you had your morning coffee yet?
Whoa! 3 days! But it was uploaded like a few minutes ago! Are you from the future? Haha 💋🍄💋🍄
i sure learn a lot from these videos
Mr Clive ,It isn't to be seen input & Output mentioned, where we can connect either way interchanged between two types of USB ports and it contains fragile USB power cord.what is your opinion about it?
Ok. I like it when you show how shit stuff is, but it would be really useful if you showed us what are good to buy!
that voice... i almost fell asleep😂
Regards to the power bank at 11:58, it's been 5 years since this video was uploaded yet to this day I can't seem to find the full video about that other power bank, was it ever made?
Hey Clive, Do you have a recommended USB Tester? I.E. shows you the voltage and current draw etc?
This is a fake version of the 10400mah XiaoMI powerbank. The XiaoMI one costs the same or less too.
That's a counterfeit of the real version which is a Fremo 10400. They even ripped off the chassis and font and everything. I have the real one and it actually is 10400 mah.
It's Xiaomi power bank, you can even find its casing being sell and marked as "diy power bank"
There are hundreds of brands using this type of casing
kkk is correct, this is a knock off of the original xiaomi 10400mah power bank, the one I had 3 years ado contained 4 sanyo 2600 mah cells, all that came after with the same design and case have been ripoffs
dude you bought a fake one too... this design is from Xiaomi
lol your's is also a fake
Excellent video quality!
Clive, do you think there would be less voltage drop, and thus higher output current, if one were to swap those crap cells with something more suitable like an LG or Samsung cell with 3000-3500mAh capacity?
Several years ago, I purchased 4 of those, they were, however "kits" with no cells. They were a bit longer and have the spring ends so you can insert your own 18650 batteries. I had a good supply from all the old laptop batteries i tore apart when disposing of "bad" laptop batteries. I found that usually there were one or two bad cells and the rest were quit servicable. I haven't used them now for some time, but when we took a trip to Yellowstone National Park a few years ago with my sister and her husband, we found that most of the places where we camped had no shore power so we had to rely on our generators for power I took along the little power banks, and gave one to my sis and one to her hubby, they kept their cell phones charged with them for 4 days I had a solar panel I could charge mine with when the sun shone but it was rare that week for much sun to poked through so I and my wife also used a couple of them. The other day I was building a calculator kit, and using a headlight that took tow 18650's. the cells petered out on my about half way through so I grabbed one of those old banks, the cells in it still had a good charge and they are still powering my headlight (well 2 of them are) The calculator kit (complete with LED/resistor function and resistor color code function is working great! What will they think of next!
I don't know why I'm watching this old video again Clive but TH-cam is recommending it again so I'll watch it again
I think his voice is very soothing.
I wonder if the problem with output voltage stabilizing point is related to the difference between the supposedly 220k value resistor being actually 240k on the circuit(assuming the schematics is valid for the physical circuit). Since it is related to the sense circuit, controller will measure even smaller voltage on the divider with 75 ohms together with 240k. I also wonder if the actual values of those resistors are close to the marked value. Because if 75 ohms resistor measures a higher value, controller will think the voltage is reached 5V prematurely and not push the voltage high enough for an actual 5V output. I checked the datasheets for diodes SS24 (on the schematics) and SS34 (the actual one on the circuit) to see if they have different forward voltages or very different current characteristics but they seem to be very close, so i don't think that is a problem.
When I'm troubled... feeling small, I listen to the soothing voice of Big Clive and then it's all water under the bridge !!!
Many people do that. I'm glad to help make life easier (and more technically interesting).
Are those 18650 batteries suitable for high drain applications? (like high power flashlights, vaping, etc.)
Not these ones.
Hey Clive can you shead some light on why 5 v has become the standard charge voltage for most Stand alone devices 1.2 a and 2.0 a just curious
I've had this exact power bank for a couple years. I've noticed some devices don't charge and it takes VERY long to recharge the bank. I assumed the capacity was false.
I didn't understand a word you said (regarding the electronics) but I found it highly enjoyable regardless
that print out amazes me
Interesting. I have a very similar (identical) looking model made by Intempo that I bought from B&M, it is rated at 8000mAh. Haven't tested it, but it does charge a large phone two or three times.
Thanks for uploading stuff like this, i was looking at them the other day and expecting they wouldn't be great but just buy more of them and use wisely cause they're cheap, but i think i'll spend the extra $10 for a slightly decent one locally, lol
Clive can you use your Keweisi usb tester with oled screen instead of the Uni-T? I can't see the lcd.
I want to know more about that LED light you used at the start.
A few things. I believe part of the trickle back @ 2.1 Amps load is your typical USB 2.0 maximum current rating, therefore, the current die off after trying to draw *more* than what the output is speced to deliver is the output transistor's protective gate kicking in. The charge curve you have observed is a deliberately designed in charge curve, *delivering fairly high current in the beginning stages of the charging cycle, but deliberately throttling down* as more and more energy is detected in the batteries via the mini mosfet circuit loop. Those look like high current rated 1755 cells (??) *If so, they are quite capable of delivering the rated spec -if not even more.*
That looks almost exactly like a Mi branded bank I have, I haven't tested it ever but I was able to charge a mobile several times fully off of it so seemed to have the full capacity?
Love how you print out the web page. :)
I'd love to know what your favorite bits of kit are. Love the videos mate :)
Those 18650 cells are used for some many different things. I've seen them in older type laptop batteries. I use one in my e-cig unit. They'e supposed to have a very definite output. Sand filled cells is a new one for me......just wow!
Hah I skipped forward to 5:33, and that picture totally got me, I saw Clive's hand for scale and thought "Daaaamn, where did he find a USB socket the size of his hand? Why is that circuit board nearly a foot long", the shadow properly fooled my brain!
What is a good one that complies with contemporary standards and has replaceable cells? Cylindricals or flat pack