These 3 Rocks Can Charge Your Phone!

[@Zanzubaa]

You reminded me, I need to copy the whole of wikipedia to my phone, just in case I get flung back in time and don't know anything about how future tech works.

[@paradiselost9946]

you have 50% charge, and have to find food, shelter, and materials before it runs out... could be a new "survivor" show!

[@Grandwigg]

And the book from that guy he's spoken to a few times James Dartnell or some such called "The Knowledge" . (I actually have a copy of it in the Kindle so on my phone, lol, for reading in downtime but don't want to break it the Kindle)

[@triffid0hunter]

I use Kiwix for that, wikipedia is about 80GB with images fwiw

[@amb1u5]

If you search Google there is a Wiki page out there with detailed guides on how to do alot of things.

[@arjovenzia]

one word: Kiwix

[@itspozzey]

Well hell 12 hours to even 20 to charge modern day tech with homemade 1800s tech is alot better than i thought. Honestly didnt think youd get to 100% charge using that. Awesome video.

[@alexanderludvigsen1893]

I mean my old phone sometimes took 12-20 hours to charge because of a bad called and shitty old phone.

[@phoenixpinkmyn5535]

Definitely! 30 hours may seem long, but if that means you can keep using your cell phone until it wears out that's an incomparable improvement.

[@aaliyahshariff8661]

Are you OK

[@HasteHub]

was planning a trip for 1820 with the fam, thanks for the tutorial

[@99istiobalavnkov]

Just don't be black😢

[@DetChesmond]

Glad your new assistants have practical knowledge of their own, it brings the series back closer to its original feel of curiosity and discovery

[@ElliotKrueger]

Thank you! That really means a lot!

[@DetChesmond]

@@ElliotKrueger No problem man! Keep up the ingenuity!

[@themailmann5960]

Watching from the year 1223. Life saving video. Thanks

[@Aarush.A.S]

2024?

[@themailmann5960]

​@@Aarush.A.Sno. 1223

[@bosch5303]

​@@themailmann5960damn how you got there. I only found the way to 1462

[@theorangeheadedfella]

1224 anyone?

[@tu.ri.to.]

I messed up my time machine and I ended time traveling to 842BC, the greeks helped me to go back to 2024, this video literally saved my life

[@El_Bellota]

It really goes to show how much energy is needed to run a telegraph for these batteries to actually be used up to the 1950.

[@Grandwigg]

Impedance plus the distances involved, and i think proximity to the ground had a weakening effect as well, even with lines above the height of railroad cars. (But don't ask me to explain it, lol)

[@agranero6]

@@Grandwigg The capacitance of the line was not important in telegraphic lines. But with the advent of telegraphic submarine cables it became important.

[@MrExasperation]

They used these cells is because they could be made on-site, every day. The components could be separated back out and reused. Low cost. It would have been far too expensive to use a supply of disposable sealed batteries. And rechargeable weren't of any use, if there was no other electricity source to recharge with.

[@riz94107]

Nitpick: you didn't produce an array of batteries, you produced a battery. Of cells.

[@KainYusanagi]

So then everything we call a battery that isn't made up of a series of cells is actually a cell? AA, AAA, C, D, etc. batteries, all cells not batteries?

[@eDoc2020]

@@KainYusanagi Yes, those are all cells. Depending on your particular definitions they might _also_ be batteries.

[@bluedistortions]

I dunno man, looks like three 6-cell batteries.

[@StapleCactus]

Improve charge time by turning off the phone. And because internet stuff wouldn't work, enable airplane mode to extend life. Furthermore, since you're limited to only what is on the phone, you can have it off when not needed, further extending time between charges. After all, how often are you going to need the calculator function or photos? Unless you've downloaded wikipedia...

[@RagedRhyme]

The "tastes like a 9v battery" "ooh! Spicy!" 9:00

[@kloroform1681]

He says "feels" not "tastes" that would've been better tho FR 😅

[@Miniweet9167]

That’s what the Indian said.

[@tonyhudgins4702]

My son was impressed and disturbed that I'd check to see if the small solar panel was working by sucking on the plug. Was right at about 6v.

[@Unmentioned77]

I think a lead acid battery would have been simpler, then build a generator hooked into your human sized hamster wheel.

[@dgundeadforge17]

After using this in 1800 your Phone is charged enough to message uber, you text . . . "Hey Uber, You won't believe when I am." . .Uber driver texts you . . "on my way" You look at your phones Uber car icon starts spinning in place then disappears to pop up in front of you. Weird Al" Yankovic is driving the Carriage from "Amish Paradise" He sings as you get on and the carriage spins and brings you back to modern times.

[@staff97]

lol ok AI

[@aaronsimpson8329]

Wow so funny

[@kloroform1681]

Lmfao yes 😂

[@OPC249]

You can't make a video about 160-year-old technology and have a sponsor supporting a desk made for the 2050 life

[@Ithirahad]

Should make a pulley-powered version of the desk instead. Less likely to break irreparably anyway.

[@Zach010ROBLOX]

I love the early electrical circuits and power sources, very fun! Definitely interested in getting a Flexispot desk soon!

[@karlregan5276]

I saw some real crow's foot cells in Virginia City, NV back 30 years ago. They had a telegraph station preserved from the 1800s

[@cfv1984]

Wonder just how hard would it be to make a decent zinc-air battery. They're a lot simpler in construction with modern supplies, but I kinda wonder if that would still have been the case in the late 1800s, early 1900s?

[@lancer2204]

NurdRage did one several years ago

[@earspontherobloxplayer1744]

Oh shoot, I should probably download this KZbin video in case I accidentally find myself in a different time period. Thanks for reminding me.

[@EMCProton]

I maintain Edison batteries. The voltage comes from the chemical reaction of the batteries. The amp capacity comes from the surface area of the electrodes in the salt bridge solution and the distance between the electrodes. Battery manufacturers use a mesh like electrodes to increase the amp capacity and size. Deep cycle NiCd, FeLiPO4, and FeNi use a a lattice framework layered with powdered Ni and Cd. The powder increases the surface area for each plate. There are some Edison batteries that have been in service for about a hundred years. My batteries' age are about forty and fifty years.

[@scottmclaughlin1410]

I can't wait for the sequel where you build a cell tower from scratch😂

[@kblskables2877]

also the bagdad battery was just a curse jar... I know cuz i saw an interview with the guy who found the site they were discovered at and opened them and saw the curses on the paper inside the jars...

[@janthran]

yeah, could've had some electrical properties too, though. if you got a mild shock every time you touched a curse jar and didn't know what electricity was you'd definitely believe in the curse, right?

[@kloroform1681]

​@janthran That's an excellent point actually 😆

[@ahveganpizzabella]

Paper? As in papyrus? What paper and ink would survive the acid and still be legible for more than 2000 years? Humbug

[@zg1k68]

Idk, when I go back in time I tend to build an induction motor and rectifiers to charge my electronics. Far less waste involved, and you can use a river or stream to power your devices over long stays with no effort after installation. What is really tricky, is making a reliable charging cable. I mean, who wants to spend that kind of money on a self-destructing USB cable to meet the FTTA guidelines for temporal litter every time you want to visit your time-share. AD Timelines and BC Time are already charging an arm and a leg for luggage.

[@ZRZK2127]

underappreciated comment, made me heh-heh

[@johnbrizendine7716]

You could have made a lead acid battery from technology over 1,000 years ago. Galena and sulfur and glass to make the whole thing. Will also be able to get some silver out of the galena when purifying it to lead. Also, don't need to remove all the other metals from the galena, as long as you get at least 50% lead.

[@eDoc2020]

You can certainly make a lead-acid battery but those are rechargeable so you'd still have the same predicament. AFAIK if you start with lead plates the battery would be fully discharged.

[@johnbrizendine7716]

@@eDoc2020 They will actually have a bit of voltage on them, and if the lead is oxidized to begin with(only the positive plate/anode should be oxidized lead), it will react with the battery acid and be anywhere from 20% to 60% charged just from being built. I have been experimenting with building my own lead acid batteries the past few months and lead acid batteries have such a capacity that even mostly dead without being charged after being built, they still put out much more power than the batteries he showed.

[@05Matz]

@@johnbrizendine7716 Oh, good point. Rusty plates on one side, clean ones on the other would mean it starts at 'partial charge'. I didn't think of that. Still requires working with a bunch of lead and sulphuric acid though, ick.

[@johnbrizendine7716]

@@05Matz this is true, definitely risky and toxic, but totally worth it for quick easy cheap power.

[@ahveganpizzabella]

​@@johnbrizendine7716lead is a very toxic metal on its own, and sulphuric acid is dangerous. If you add acid to lead, you have high risk of getting lead poisoning from the fumes and from just handling it as well

[@AriadSantana]

Thanks for this tutorial. I'm on my way to the Eleasatic mysteries with a glass of wine mixed with psychedelic rye, i was desperately needing a tutorial to charge my phone so that I can record our dances!

[@ahveganpizzabella]

A GLASS of wine!?! Clear as crystal, hard as rock, shaped into any desired shape?!?! She's a witch!!! Luckily the psychedelic rye and corn rust will make sure everyone is cool with ur scary glass goblet

[@555-xd1fo]

The thing that I love in your videos is that you ar use chemical compound and elements from nature

[@THE-X-Force]

Everything on Earth was derived from "nature".

[@olli1068]

Be sure to have a little solar panel with you which is suitable to charge your phone. If you time-travel to a point where there is no sunlight, your phone might be the last problem to worry about.

[@starfirebird3099]

hmm, i think your time traveler might find it more convenient to bring along a solar battery pack (but this is really cool)

[@I2ed3ye]

Thanks now I have a good cover as a traveling battery merchant!

[@Maxwe1I]

8:46 LEMONADE!

[@ahveganpizzabella]

Mmm forbidden lemonade 😋 🍋

[@Dr-Zoid-Berserk]

I’ve been wanting to see this done for years. Whenever I see a modern show where the MC transport to another world, they usually use magic to power phones. Naturally, I wondered how/if you can McGyver a real life solution.

[@anneo8393]

If we only send one time traveler back in time, I nominate this guy

[@outforsummer5818]

Wire mesh also helps make more surface area than the same size in sheet metal

[@00Klingon]

You don't need to go back 100 years to be amazed. 1995 me would have been absolutely blown away by even budget smart phones we have today. Touch screens, LiFePO4 batteries, USB and Qi wireless charging, all would have been mind blowing but Wifi and Bluetooth wasn't even something most people imagined possible (was only a twinkle in the eyes of a few engineers). The fact that the device would have been the most powerful computer on the planet and fit in your pocket would have been equally impressive. The largest problem to taking a cell phone back in time is the fact that almost everything relies upon constant internet/cellualr. There was no 3 or 4G (forget 5G), no wifi, and no USB on computers means you have no way to do much (except what is already downloaded on the phone) even if you could charge the thing.

[@doombuddha]

I am immediately wondering how one would be able to test the voltage or the battery? Assuming advanced tech and knowing the voltage (and amps, ect) that it would require, how could you test that in the same rudimentary way you are creating the battery? Other than not overcharging or undercharging, how would you know you got it?

[@PrebleStreetRecords]

Look up the “electroscope”, a very early means of detecting and measuring charge.

[@PixlRainbow]

early voltmeters are made with a very high resistance resistor attached to an extremely sensitive galvanometer. A galvanometer is constructed like a motor, except that it only has a single coil/pole and it contains a spring that pulls it out of alignment. Applying voltage causes current to flow, which causes the galvanometer to pull against the spring. As the tension force of a spring is directly proportional to the elongation of the spring, the angle where the galvanometer stops rotating indicates the amount of force the galvanometer is applying, which is proportional to the amount of current flowing through the coils. As the current is directly proportional to voltage, this gives you an indication of the voltage. To avoid draining so much current that the voltage sags from battery internal resistance, the whole system is calibrated to run with very very little current.

[@ElliotKrueger]

@@PixlRainbow It might be interesting for us to attempt to construct one of these. I don't mind my current method though, of just "tasting" the electricity 🙂.

[@cfv1984]

Depending on how far in the past we're talking about, you should be able to do some electrolysis and then doing the math should be fairly easy for the kind of person to randomly make themselves a battery one day lol

[@geoffgeoff143]

Galvonometer

[@FrauWNiemand]

Given the initial idea of a time travelling person, you may not only need a telegraph station but also a fitting plug adapter for charging your smartphone within 30 hors. But I like the idea. Please (for foreign followers) add the final ingredients written in full on-screen. Thank you.

[@theanimeotaku2794]

Why use make a battery when you just make an alternator and connect it to a water turbine to a nearby river, and i guess a power inverter to step or step down the voltage or even just a home made little solar pannel

[@MemeKing44]

wait, are you generating power? or are you storing power? this part was confusing.. also what kind of hardware did you create to convert the raw power dc, back to ac to charge the phone?

[@hoarderofsecrets]

So I understand that the video is about making a battery, which was very fascinating, however, based on the title, would it not be easier to make a generator, powered by a water wheel? Oddly enought the exact premise is something I have thought about (going back in time and needing to charge my phone), and I always figured that a geneartor would be easier to create/source material for then the chemicals for a battery. Basically, magnets and copper wire. I'm not an engineer, so maybe its more difficult?

[@PixlRainbow]

the magnets?

[@ElliotKrueger]

I think this is something we're definitely wanting to do. However, one of the major setbacks is how to produce permanent magnets of a significant strength. From what I understand, natural loadstone magnets are pretty weak, and making stronger ones typically requires pulses of electricity at a very high current. Additionally, you'll want to produce a lot of very thin wire, which from our experience, is pretty laborious. I don't think any of this is outside the realm of possibility though!

[@JPRTonundFilmstudio]

​@@ElliotKruegerisn't it feasible to generate electricity by having a small battery serving as a "starting magnetic field" and the generated current in part to amplifying the magnetic fields further. I thought that car alternators partially work like that. When you spin then you don't feel the axle locking that you feel when spinning a permanent magnet motor. I am not an expert though...

[@eDoc2020]

@@JPRTonundFilmstudio Yes, self-excitation is the way to get around a lack of permanent magnets. The Daniel cell would provide enough for initial excitation.

[@MrSameerMalik1]

flexispot sponsoring everything recently lol.. blacktail, diy perks and you

[@ysolda9614]

I'd go for any sort of generators. Water, wind or steam generator seems legit to me.

[@Rowlesisgay]

generators make ac, vary with the input speed, and rectifiers, well, you just need decent capacitors but i'm not sure how one really makes those, but the operating principle is so simple. Anyways, a battery is a generator. It uses the chemical energy in the solution, or in the metal of the contacts, to power stuff. And, you aren't tethered to a river whenever you want to charge your phone. Though yeah, generator is a very good idea, but needs either a rechargeable battery or an essentially modern psu for anything digital/communicaty.

[@ysolda9614]

@@Rowlesisgay If we only swap out the power source in this video's setup, so he gets to keep everything other than the batteries, I'm pretty sure AC would work just as fine.

[@Rowlesisgay]

@@ysolda9614 why ? phones charge with dc and I didn't see any rectifiers.

[@ahveganpizzabella]

Only a flux capacitor powered with a bit of biogas compost and a tin can

[@mazthehe]

If your a time traveler use gold instead of copper as well this is genius for reactions as it is reactveless making it very good at increasing voltage when needed

[@friskydingo5370]

Magnesium and coper would make a higher voltage and current. You can obtain magnesium from sea water or from Epsom salt magnesium sulfate.

[@latemcire8387]

I think 1800’s internet and cell reception is a little spotty.

[@aerolchristopherinfante]

Thanks! All I need is the internet.

[@glenmorrison8080]

This video better been worth it. Just accidentally traveled to 1294 BCE and my phone has exactly 14 minutes of charge left.

[@cayenigma]

Bigger problem would be, if you did not have the charging cord with you, no-one could produce such delicate parts back then, well maybe a jeweler

[@ElliotKrueger]

As it turns out, you just need to be able to produce some wires and come up with a way to connect them into the charge port on your phone. With Android, we found that you only need the power and ground leads to charge it. However, with iPhones, you would need a total of 4 wires, two of which for power and ground, and two of which for data and ground. You'd then have to supply two different voltages, with the data being 3v in order to signal the phone that it's okay to accept a charge. It took some experimentation for us to get this to work, and I may have destroyed more than one of HTME's iPhone chargers figuring this out. 🙂

[@Marty_Destroyer_of_Worlds]

that's actually kind of impressive

[@yellowninja19]

those are some pretty sick batteries

[@ihspan6892]

Past? I am not travelling there! Great video ;)

[@noThankyou-g5c]

this will be so useful if i time travel with a bunch of mason jars, wires with alligator clips, and an arduino with a usb port

[@thexalon]

These batteries have what plants crave!

[@I-identify-as-a-piece-of-white]

Could you try to use electrolysis of water to do something? As well as make a primitive form of a power alternator?

[@thegrumpydragon7601]

Can you make a battery 1500”s to charge a phone We are planning a trip this weekend

[@Nonsanity]

What about using something more renewable, like water power? Practical from scratch?

[@No.Good.Nickname]

For everyone interested in the actual history of the 'Bhagdad Batterie', you might want to watch Miniminutemans vid on that.

[@friskydingo5370]

The electrodes need to be closer to each other, and a fabric barrier between the cathode and the anode would increase your results.

[@Ayduin]

My advice to all time travelers: like the video that way its easier to find when u need it^^

[@cellofellow4101]

I must go and prevent England. No reason, just want to see how it affects the timeline. This will help, Thanks a lot!

[@cellofellow4101]

Despite all my efforts, England is inevitable.

[@bok1080]

The irony of the comment (12:18) of how simple telecommunications starts and where it is today, modern communications uses a digital signal (either on or off) and the old simple telegraph uses a digital signal (either on or off), it is just the encoding of the signal that has changed. The modern system uses a fixed byte size and standardises the signal, where as the 'old tech' used a variable byte size with an 'end' signal, thus minimising the 'dead' time in the transmission (when no data was being sent, just empty bits), example on Morse code 0 (zero), which has the longest signal in Morse code (5 dashes) is a 23 bit byte (1110111011101110111000), but e is only a 4 bit byte (1000), both having the 000 as the 'end signal' to show the end of the byte, thus saving 19 bits of bandwidth for use on the next byte (or more). Funny how sometimes 'old technology' is often more advanced than the 'new technology' as the old timers had to make more efficient use of the available resources (in this case the 'bandwidth' available).

[@martinborm2871]

This also means, you could replace the whole array of jars in a telegraph station with your phone battery and power it for quite some rime.

[@sylaswojciechowski6895]

11:25 it actually takes less time for a battery to charge from 0 to 50%, than it does to charge from 50 to 100%. So charge time from zero may be lower that 30 hrs. This is because the voltage differential is higher at a lower percentage.

[@CoffeeFiend1]

Christopher Dunn and Geoffrey Drumm have entered the chat.

[@TheKdcool]

for this purpose, it would be a lot easier to create electricity using a motor as you would only need copper and magnets. But you would need to crank it or pedal or something

[@antiisocial]

Very cool! Thank you!

[@RealAndySkibba]

Downloading this in case I ever get sent back to the past.

[@eko-odd1297]

If you were to go back in time 100 years or farther in time with your phone you’ll only be able to take pictures/film your surroundings, use the calculator, listen to music, and watch save videos/movies. There wouldn't be a wireless tower to use to make calls/text, there would not be WiFi/ internet, maybe your clock wouldn't work right, calendar, weather app, maps, payment by phone, and other apps

[@gokart6796354]

I think that goes without saying. Clock, calender would work and you can use maps like normal maps

[@PixlRainbow]

Your phone also has a built-in compass, and also an accelerometer that allows it to serve as a spirit level or an elevation gauge. Some phones are also capable of basic AM/FM radio reception, and the headphone jack can be jerry-rigged for AM/telegraph radio transmissions with the right app. If you have any plate solver apps or celestial navigation apps saved, those would still work to automatically calculate your location as they only depend on the position of natural objects (sun, stars, time of day, etc)

[@notconnected3815]

Verry nice project! Now i have a good intuition on how much more energy dense these lithium batteries are. Copper, sulfur and zinc are all non toxic, right? (unlike lead acid batteries)

[@05Matz]

They're... not _non_ toxic (I know copper compounds in particular are dangerous for fish and other aquatic organisms), but they're things I'd be much happier working with than lead. I'm certainly no chemical expert though. AFAIK, all three should be only 'temporary' poisons that clear from your system over time if a little bit of contamination gets in. Lead sticks around mostly for life. Some of those compounds might be harmful just because their PH would burn you, though? Lead acid batteries are full of... well, strong acid though. that would DEFINITELY burn you. So these batteries are almost certainly much safer, I would think. Modern lead acid batteries are pretty good at keeping both the lead and the acid far away from you, though.

[@ahveganpizzabella]

Zinc fumes are sadly very toxic when you melt the zinc especially, giving terrible zinc poisoning and zinc disease similar to lead poisoning. Sulphur is highly damaging to lungs esp the burning fumes of it, or acid fumes, and kills the liver when ingested. Copper is less toxic but it will accumulate in your body organs like eyes, liver etc over time if u work with it unprotected and taste the wires and breathe in fumes from the acid solutions like they do

[@thatguychris5654]

8.6V with 30mA is about 0.25W hmm

[@jua20242]

Can you try to make a functional eléctric generator Now that you "unlock" wires?

[@nunyabiznez8120]

If you are a time traveler, just use 1 weak battery and use it to start the coils of an electrical generator made from copper wire obtained from a watch maker or jeweler. No permanent magnet needed. Worst case, make your own wire.

[@WynterLegend]

I would have thought a Lead Acid battery would be easier to make, if you have safe access to Sulfuric Acid. Am I wrong?

[@vittorioballeriocastoldi6171]

A modern smartphone would amaze someone from the 1980s, let alone someone from 100 years ago

[@forcivilizaton5021]

Imagine taking a nuclear reactor to the mid 16th century and having them try to understand how it works.

[@mrgrumpy888]

If you have a phone in the 1800s you could probably find a way to use the excess heat from the burning pyre after the locals sentence you to death for being a witch.

[@AnthonyAllenJr]

I'd be interested in seeing a custom made electric motor that can use physical rotation to generate electric current in same concept as this.

[@mcRydes]

which video on this channel covers the process of producing zinc? Weirdly I can't find it. Only the video about making Roman brass.

[@grayish6963]

Wait I’m a little confused, when he makes something, is he allowed to use the modern version if it’s not any different than historic ones? For example the copper cups

[@jca111]

Surely building a simple generator connected to a windmill or waterwheel is the easiest option Magnets, wire, and iron

[@imoldgregg8]

Well yeah... electricity is electricity 😂

[@Michealfarmer]

This video really shines a light (pun definitely intended) on the fragility of all modern civilisation. I fear for the day that we run out of oil.

[@phobosorbust]

At this point oil is a convenience, not a necessity. We can make any hydrocarbons we want out of hydrogen and carbon. Prices will swing, energy demand will spike, but we won't actually lose anything critical.

[@Michealfarmer]

I wonder how energy intensive this process of making hydrocarbons is. I imagine extremely. If it was straight forward that’s what we’d be doing now. Sounds like a pipe dream to me. Like the pipe dream that caterpillar had in Alice in Wonderland.

[@phobosorbust]

@@Michealfarmer Very colorful. Good thing modern chemistry doesn't run on gut feelings and metaphor.

[@РусланМанузин-о9ц]

даже при том что с 60% до 100% заняло 20 часов это все равно невероятно крутой результат. Всем попаданцам на заметку !

[@carter_schwertman]

The time traveler that got this in their recommended with only 5% left: 👁️👄👁️

[@Ithirahad]

...Zinc crows' feet? Electrochem is literally just occult magic, I swear.

[@caydenpo1001]

An electric motor from scratch woould be interesting and maybe using that to generate electricity instead of the much more complicated battery.

[@mattkhosh]

Love your videos

[@ElliotKrueger]

Thank you!

[@renecouture3719]

wow, get your batteries prepared to send message signals over telegraph. We're stupidly spoiled these days. Crazy where we're at now.

[@christow7989]

So it seems if you're using the crows foot battery, you should use a thicker gauge wire to suspend the zinc electrodes

[@somethingstupid699]

badass bro!

[@ElliotKrueger]

Thanks!

[@lemmonsinmyeyes]

Wasn't this the plot of that teen titans episode where Cyborg goes to the past and needs to recharge his battery to fight?

[@customerservice2902]

If you took your cell phone back in time it wouldn't matter if you could charge the battery or not. Cell towers wouldn't exist.

[@ryanstafford9717]

the calculator, any stored data (any: pictures, text, videos, etc.), and a SCREEN! THAT YOU CAN TOUCH! would have blown minds.

[@roberthealey7238]

What about iron Edison or standard lead acid batteries for more current? Or were you trying to do something that would be period appropriate vs time traveler with future knowledge?

[@sethr.c1065]

This was great, but can you really charge an iPhone without precise machining for the charge cable? As I understand, even just copper wire requires pretty impressive machines.

[@ChrisNguyen01]

Transported to the past. How do you determine voltage suitable for charging without a volt meter?

[@kittyprydekissme]

Did you ever explain how you got the zinc sulfate? I assume you just dissolved some zinc in sulfuric acid, but you really should've mentioned it. I don't think we ever saw you unlock that chemical.

[@christopherhendriks9659]

There is no zinc sulphate. He made copper sulphate, sulphuric acid and made a crows foot of zinc and copper

[@kittyprydekissme]

@@christopherhendriks9659 He says 'zinc sulfate' around 7:16 or so. And again at 9:50.

[@aidinia]

this is a topic that I'm really interested in, although I'm pretty sure if I get to time travel I won't have enough time to do any of this before I get burn for being a Witch

[@dreamyrhodes]

Probably would make more sense to create a small generator with a treadmill although you somehow need to rectify the AC produced.

[@fairybeliever4479]

Not an engineer.But I believe it’s all about how you place the poles of the magnets to create AC/DC current. I think that if you put the magnets with interchanging magnetic field, that will create AC. But if you put them with the same field pointing in one direction, then it will create DC.

[@eDoc2020]

@@fairybeliever4479 The changing magnetic field is what creates the voltage. What you do is generate AC but use a mechanical commutator for rectification. This is basically a brushed DC motor.

[@jonwhisler6967]

when is HTME making a time machine?

[@garrettzuhoski]

"crow foot shaped". Man those are pot leaves

[@Pure_Science_and_Technology]

Where do you get the wire from?

[@sarahsmith840]

Lets all reflect on the irony of building batteries to charge a battery.

[@gizmofire]

This is all fascinating however wouldn't it be easier to simply create a simple generator? If you have access to a water wheel rpm shouldn't be an issue

[@WizardClipAudio]

Number one rule of time travel. You can’t bring your phone. Everybody knows that. 😂