He’d have been the most dank teacher ever! Whatever he taught, students would remember forever!

Yeah, and with all the dangerous stuff he does he would have fitted in well in the 70's when I was doing science

MY science teacher in them 80’s at Havasu high was the best and let me get in early and set up and test things.

Where is it the a in have is included in contractions?

@@nicewhenearnedrudemostlyel489 well spotted, looks like the English teacher wasn't the best either!

Leif Neland we did that at electronics collage years ago!

Me too XD

Holy shit, no PCB then?

sure their was he absorbed it thats why he is out of his mind and posting on youtube

In high school we would 'unwrap' them with overvoltage

Sam J in my local pound land the power banks now cost £2!!! That's a 100% increase!

+Sam J --> Actually I think Clive has a special arrangement with the stock personnel at his local Poundland so that he can buy them in the 24-count shipping box. LOL Saves them from having to put them on the shelves. ;)

HAHAHAHA! don't they say the same thing to the individual with the metallic gold mustache purchasing multiple cans of metallic pray paint? LOL! STOP SNIFFIN' THAT CLIVE!!!

"You DO know these are rechargeable, right?"

not rechargeable if seperations and ionic polymers meet! NO CHARGING or LITTLE CHARGE HOLD. and for a proper e-battery for vehicle to work all cells must be approximately the same!

More likely the gin ;)

I'm very easily distracted when opening things. I tend to go off at random tangents all the time.

perhaps!

Single malts.

That's why I watch...

didn't even know that was possible... was it like a D size battery or was it from a lantern battery?

@@fungusenthusiast8249 AA size. I didn't think they could explode either. Must've been fully sealed batteries. Cheapo ones off the market.

Back in the early 80s I was in grade school, and a "class clown" in my classroom had to stay inside during lunch hour recess and write his "I will behave" sentences on the chalk board while the rest of us were outside playing. When us kids returned from outside recess, I had noticed the "clown" was at the sink in our classroom, and he was constantly sipping water from a glass jar and spitting it back into the sink. My desk was right next to the sink, and I had asked him why he was doing that. He stuck his tongue out, and there was a BIG NASTY crater of what looked like melted skin in the middle of his tongue. I was shocked, and asked him what in the HELL happened... and he showed me a half disassembled pile of pieces from a 9 volt battery, and told me that he had used his teeth to pull the terminals (of which one of them was some kind of rod) out of the battery, and as it slid out, some kind of "acid" had sprayed out of the hole right onto his tongue and ate some of the skin off it. That was 40 or so years ago, and I STILL have a crystal clear image of the burnt crater on his tongue in my mind. I've had respect for batteries ever since then.

One example of complete bullshit regulations from the last century.

or it could be the 4GB filesize limit on FAT32 storage devices.

John Hollowell No, its marketing / sales reasons. Every 1080p camera I have splits the files at the 4Gb barrier. Whether they have a 30 min limit or not. On my Canons, it splits before the 30 minute timeout.

The other feature that gets flagged is “Clean HDMI” out. Usually the cameras that limit at 30 min, don’t provide a full resolution, non-OSD hdmi signal while recording. (Which would be one way around the 30 min timeout. )

Yeah, when cameras stop recording at 30 min, its the tax artificial limit. But the FAT 32 format of most SD cards and other storage devices limits the size of a single file to 4GB. This is why recorders will split the recording into 4GB files.

there's a copper sheen in the electrolyte. (bingo! she's dead.) ---------------------- What exactly is dead? Did copper got in the electrolyte? But how did that kill the battery? Thanks.

He has an explosion containment pie dish.

Yep. The balance plug is indeed used to prevent one cell from rising over it's max voltage during charging, as the charger has access to each individual cell in the pack through the balance plug, and will automatically cap the max voltage to each cell. In theory, balance charging will also help to prevent the damaging "reverse charging" scenario during the packs use, because the cells all started with the same exact voltage when the pack is then used. (As long as the cells are all healthy, and were matched well before it was assembled.) In my opinion it still pays, with lithium packs, to stop using them before the BMS cuts them off, and recharge them. Doing this extends the life of the pack, and ensures that there is no way to possibly run into the reverse charging situation.

the black powder is manganese dioxide and it is moist with ammonium chloride solution. The electrode in the middle is a carbon rod. And has a zinc outer coat.

OH I was going to mention, the only problem with watching your great videos, is the tennancy of your smoooooooth voice to put me to sleep. My wife keeps telling me that I should watch your videos in bed since I have a hard time getting to sleep at night because I keep getting these long naps at about the middle of the third of your videos I re-watch daily.

Indeed!

And tonic water is like 90% water, that's some nasty stuff...

But Gin goes great with everything!

Is that a problem?

This is a piece of foam.

They really should not put so large amounts of dangerous water into their gin.

Carcinogenic not cancerogenic

youtube spell check didnt say it was correct

that's cos its american, limited vocabulary

PCB 5%

@@arvidsgills1157 KZfaq doesn't have spell check; that's either from your PC or phone. You're batting 0/2

Dustin Sparks as hard wired as a firmware hack

Legally limited where? Any how do you define a "small point-and-shoot" camera? I've never bought a camera that is artificially limited to 20-30 minutes

It's a taxation or customs/tariff thing, can't remember exactly(not gin, but beer to blame now)

In Europe there is a tax levied on devices capable of recording more than 30 minutes. Manufacturers of mainly still cameras thus limit to 29:59 artificially to avoid having to increase the price for something that's not a main feature.

This explains it quite well: www.tested.com/tech/photography/44445-why-digital-cameras-have-a-30-minute-video-recording-limit/

Diodes leak current. That's undesirable in an energy storage cell.

Take one bottle of generic vodka and add two drips (and I really mean just two drips) of essential juniper oil and one (once again just ONE drip in a 750ml bottle of vodka) of four thieves essential oil. It will convert the vodka into an aromatic gin. Four thieves oil contains clove, lemon, cinnamon, eucalyptus and rosemary oil. Do not add too much oil or it rapidly becomes overpowering and unpleasant. Ethanol is a solvent, so when the bottle is shaken the oils will diffuse into it.

Sounds interesting. Ordered some oils, it will be fun trying it in a week or so when they arrive. Thanks!

bigclivedotcom Clive, I am a gin snob. No apologies offered for that. I must try this.

Since you mentioned oils, the first thing I thought of was Diesel. Diesel gin and tonic anyone?

Da9eI You can buy it. It’s called Sibling gin. Sorry, gin snob comment there. But that stuff tastes like I’d imagine your suggestion would. Foul.

Bill Carini vape naysh bro

Probably not the ones in the video because they are probably going to be of the low discharge variety Aand I just googled them and they are only rated for 5.6A maximum discharge, so you could only use them for tanks that use less than 17w

Reviews+Tutorials I stick to VTC5A for my mechs. I actually have been running some LG 20650's in a mech and they are fantastic!

Darth Vaper?

Vapers are the Vegans of smoke. They need to tell everyone that they are one.

Interesting. I've noted that down and looked it up too. Quite nice that the technology was developed by a German-born American in England. That covers every base. Even better that he is actually called John B Goodenough.

Mr Goodenough is a professor at UT Austin

Which covers the fourth country, Texas.

bigclivedotcom if you feel particularly happy, you may have lithium poisoning. Lol. But actually, I bet you could eat all the powder and still be fine... The compounds listed have pretty high intake requirements to be toxic...

CLIVE - What I got from our secret German Wunderwaffe papers below concerning your cell: 1) The Kathode is Lithium-Kobalt-Oxid. The Kathode is sitting on Aluminium. The Aluminium is merely the conductor/contact, NOT the Kathode. 2) The Anode is Carbon in the form of Graphit. The Graphit is sitting on Copper. The Copper is merely the conductor/contact, NOT the Anode. 3) There should be wetness in form of electrolyte (lithium-salt + organic-solvent) between Anode and Cathode and you only have dry crumbs. I suspect, that like in an old Kondensator or capacitor as you call it, the solvent of the electrolyte has dried up in your cell. Try adding some Ethylencarbonate and Dimethylcarbonate in a mixture 1:1 and have a look if the cell works again. But check first under a microscope, if the nanostructures in the graphite layer are still OK and if the SEI layer (Solid Elektrolyte Interphase) is intact.

Lithium is used as a medication for people with bipolar disorder.

MRLT yes and mercury helps children in vaccines too

Wrong, wrong. The cobalt ions are the bad guys here. The Li+ is quite tasty actually kzfaq.info/get/bejne/iLCYbNyFrqi9ZGw.html

You realise you're saying this to a large Scottish man who drinks gin while making these videos, don't you? :) Also, if we're freaking out about dangerous heavy metals, best start prying out those amalgam fillings before the mercury rots your brain ;-)

Or ethylene carbonate. 18650s pretty much behave as any sealed metal cylinder such as a tin of beans containing a liquid - if heated to extremes it may vent -- sometimes violently -- and as ethylene carbonate is flammable, it may or may not ignite depending if it comes into contact with a spark or red hot conductor. The real concern with lithium cells is not the small amount of lithium they contain, but those that contain carcinogenic cobalt compounds such as most LiPo pouch cells and 18650s with an ICR prefix. These should be recycled and never thrown away - not least because cobalt is currently $80,000 per ton! Not all 18650s contain cobalt. A browse through wikipedia on any of the many different compounds found in lithium cells will provide a lot of useful information. en.wikipedia.org/wiki/Lithium_cobalt_oxide

That does not sound terribly fun - and quite messy.

Ignes Andros; More messy than washing off all of the graphite to try and visually see a hole underneath? That paste is quite firmly on there, simply moving the probes around on it shouldn't be THAT messy...

MRLT You might punch holes with the probes. Which is why I would take 2 metal plates and put them on both sides, now you can measure a bigger area and not risk puncturing it

Reviews+Tutorials Yeah that is a good idea. The only issue is that the larger the squares are, the less likely you will be able to localize the small pinhole. Perhaps simply submerging it in a shallow amount of water, on top of a large piece of Aluminium foil, would be better. You could attach one probe to the foil (which touches one side of the seperator), and then simply move the other, small probe tip around without actually touching the coating at all. The water's resistance should be large enough (regular tap water should be fine), so that you could easily tell when you're right over the hole.

MRLT Or you could just move one plate after you found the short so the area where they are on top of each other is smaller. And simply keep making the area smaller until you found the point

That makes NO sense. There is no charging circuitry inside the laptop battery pack. It's all on the laptop motherboard. The only thing you will find inside the battery pack is overcharge/discharge protection, fuelguage and some other safety mechanisms (over temp shutoff, chemical fuse etc.)

I have experienced a number of lithium batteries fail from the protection IC taking a dump. The tiny epoxy encapsulation of the IC itself had deteriorated, turned into a substance like a putty. Lead wires to the die lose support and break. Replaced the IC and good to go. I guess when China runs put of regular encapsulation epoxy, they use dog shit, newspaper bits or whatever can be found to load into the encapsulation molding machine.

zapro_dk I didn't say there was charging circuitry in the pack.. although there is balancing circuitry in most if not all packs. Most protection ICs will separate the battery pack if it detects any faults (over temp, under voltage, overvoltage etc) this is marked as a flag and some batteries allow a certain number of flags before it's deemed unusable. I was hoping that one of the cells were low from the dodgy charger lead shorting out or some other easy fix. Hope this cleared some of your confusion up

Skruffles maybe charger was outputting the wrong voltage??

Charge IC has some eeprom inside that it uses to record cell condition, and when it detects failed cells it writes the eeprom with a fail code and then stops responding. Can be reset with the right software and programmer. Others also have a fail safe blowable fuse on them that the charge controller blows open as a final safety to protect the cells from abuse, along with the regular mosfet charge and discharge control switches. they all will have a thermal one time fuse as final overheat protection, though there are plenty of examples of these being a little too late to prevent the battery catching fire as it vents the electrolyte and it contacts a source of ignition.

A diode in reverse parallel could limit the reverse charge to 0.6V.

Clive, active bypass diodes could limit reverse bias to just millivolts - they are just mosfets with a charge pump to run the gate This is why they are used on solar panels to prevent groups of shaded cells from becoming reversed biased and turning into heat sources that could damage the cells, cause hotspots or even cause a fire. They could be used on lithium cells too for currents

It would also stop normal charging.

You sure about that? Whether charging or discharging, the cell's anode always stays more positive than the cathode so the diode would never become reverse biased, unless the cell is completely depleted and/or overpowered by the other cells in series.

I understand "diode between the batteries" as putting diodes and batteries in series, which would allow current to only flow in one direction. Hence only either charging or discharging would be possible, depending on the oriente of the diodes you put in place.

I (and I'm sure many others) would be very interested to hear. I always like hearing from a real researcher / professional. I have read a lot and it seems most people just recite the same things and clives reverse charge explanation sounds best to me so far. I've totally discharged some cells but whenever any are reverse charged (such as in a pack) the casualties are very high. Way higher than 0v discharges. I don't know chemistry though.....

Ammoniummetavanadate mind officially blown. Thanks

Ammoniummetavanadate yes u r right i learned from battery mooch spot on there buddy.

I love you.

volvo09 He isn't wrong about the plating aspect, although that rarely happens. My main issue with his analysis is that is leaves out the electrolyte, cathode material ( it isn't graphite, it is generally a lithiated cobalt or manganese oxide structure) and SEI (solid electrolyte interface). Lithium ion batteries are not chemically stable, the electrolyte will attack the anode and cathode materials (generally carbonates mixed with lithium hexafluorophosphate) but are inhibited by the SEI. Too much heat and the electrolyte can further react creating those pretty explosions we see which also release things like HF gas. The electrical potential is part of it, but the chemical degradation is where the smoke and flames come from.

That makes you almost as cool as clive

There are various camping sites on the IOM and nothing but hills. I'm not sure the best site. Maybe in Laxey?

You said you like to walk up hills. How do you feel about walking down those hills? Or have you found a way to only walk up?

Forever Learning funny 😁I tried to go up Snowdon but failed due to the weather. I wonder if we can go in calmer times

bigclivedotcom thank you. It's my birthday in may, end of may, so I might have enough money to go camping. I'll look up the place you said. Cheers man.

@@johnt.inscrutable1545 You get the train up, have a pint and then walk down.

Precariously placed in the center, nothing could go wrong

Xgames in the making

I think it's some sort of pyramid scheme to rip off the clueless.

@green Silver Why not both?

Then you'd need some tonic.

Jusb1066 the iphone may be the reason why it doesn't hold a charge !

You have to be quick to get the unicorn with a hammer.

Hear, hear Wolfin. I managed a chemical plant that manufactured polyurethane adhesive in twin 4oz tube dispensers with a mix tip (like epoxy twin tubes). The main chemicals used for the urethane reactions were isocyanates, clear syrupy liquids that had only a faint smell of fruit (apple, pear, peach). To the uninitiated they appeared relatively benign. However, they are deceptive. Being able to detect their faint pleasant smell at all meant that one was being exposed to an unsafe concentration level. As with many other dangerous materials, initial, and even repetitive, exposure sometimes did not immediately manifest the harm that's been done. The isocyanates are also powerful sensitizers. This means that each exposure increases one's sensitivity to the next exposure, i.e. the level of exposure required for profound respiratory and other symptoms of toxicity to present is decreased. Direct exposure of the skin to the finished product or precursors would cause no apparent harm if the area was briefly flushed with water (which catalyzed the formation of the inert polymer). If left untreated, however, a lesion would develop as with sensitizers like poison ivy, oak, sumac...etc. The method of producing the product (compounding, packaging, testing, quality control and equipment maintenance) meant that all company personnel had the opportunity to come in contact with clear, mostly odorless, reactive material on any, and all, surfaces. Opening any door could contaminate oneself. This was especially problematic as regards the bathroom door-as you can well imagine. Over time, depending on the thickness of the deposit, moisture in the air polymerized the isocyanates rendering them inert. Unfortunately, although I provided half-mask respirators (HEPA /activated charcoal filters) & nitrile gloves, performed lung function & respirator fit tests and gave initial, as well as ongoing safety training on chemical hazards and protective equipment, almost every new employee had to experience at least one incidence of poison ivy-like rash. The rash doesn't spread, it can itch a little bit and disappears in a couple of days, but it spooked the heck out of people. The new hires had little understanding of the importance of my rash prevention warnings, no matter how simple and emphatic I made them. They all, of course, no matter how small the lesion, with no exception, insisted on seeing a doctor, thereby creating an insurance premium increasing incident reportable to Workman's Compensation as a work related injury requiring a doctor's care.