Supercapacitors Instead Of Rechargeable Batteries

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Here's a little experiment of mine that tests the viability of using supercapacitors instead of rechargeable batteries in portable electronics. Supercapacitors charge much faster then traditional batteries and absorb the charge current more readily since their internal resistance is very small compared to a regular chemical battery. This is only a proof of concept video. If this was to be truly implemented, you would size the supercapacitors significantly and most likely add in a buck-boost converter to use more of the energy stored in the supercapacitors.
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Опубликовано:

21 окт 2024

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Комментарии : 600

@joedfazio 8 лет назад

A boost/buck switching regulator circuit seems to be a perfect addition for making most use of the available charge below the 2.9 volts. I see super caps making big impacts the in the near future with plenty of applications, thanks for the video!

@toysareforboys1 10 лет назад

If you have the capacitors wired in series wouldn't you only have 250f?? Wiring them in series doubles the maximum voltage capacity of the pack, but doesn't double their farad rating. Wiring them in parallel will get you 500f but a maximum voltage of 2.5v which was probably too small to replace your 3.6v battery.

@caryfuk8 10 лет назад

you right. two supercaps in parallel wiring stil have same voltage. This men charging 2,5-2,7v two supercaps in parallel wiring on 5 volts. one have 25 farad. two in parallel w. have 50 farad. I thing if i charge 2.5 volt cap on 5 volts have smaller capacity ....

@thusharafernando4402 10 лет назад

a beautiful girl with a BRAIN!!! YAY!

@nazvlpatel6720 7 лет назад

Thushara Fernando just dont judge by a dp

@mfb5642 7 лет назад

There's no girls on the internet noob.

@celsonem5628 7 лет назад

@tecter100 8 лет назад

I understand that it works from a large cap but what I'm wondering is: How long does it take to hand crank the OEM battery to a usable level and how long it lasts in comparison?

@thestruggleisreal9626 8 лет назад

+David Terpening This ^.... this is a very important part of the scientific method. Due diligence, if you will. He needs to make another video repeating this experiment with the batteries.

@MrSighAnne 8 лет назад

+TheStruggle IsReal Ever used a battery? Probably don't actually need to test how long a battery lasts in a common portable music player. If you actually think that is necessary for this test, you will want to keep working for someone who is not you.

@Justwantahover 4 года назад

The battery will last longer when fully charged but it will take a long time to charge it fully (a lot of winds). The super caps would last 2.5 minutes on a full charge and charges really quickly too. Super caps have only a fraction of the run time as batteries but can charge way quicker. But super caps will (basically) last for ever (as many recharges as you like). If they held power as much as batteries there would be no batteries (and batteries suck cos they don't have many recharges).

@christiankulmann3325 3 года назад

Supercaps Powercap 36× 500F Battery Accu Solar Grid-Tie 2,7V Farad ➡️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ihSc7Bj_oQk.html Homemade DIY 660Wp SunTracer Solar Tracker ➡️ ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-X0lmYFwOq3U.html

@madelectronengineering 11 лет назад

Thank you! Yes I did get longer run time when I hooked up a small dc boost circuit to the cap to drain the supercap further and still provide suitable voltage to operate the radio. The only problem with using a boost circuit in THIS application is you can't recharge the supercap directly through the factory 2-pin connection using the hand crank. The diodes and other circuitry of the boost circuit block the reverse flow of power from the dynamo crank.

@madelectronengineering 11 лет назад

A voltage regulator would be used to keep from overcharging the supercap. Your crank light will work better with a supercap in terms of energy cranked to energy retained since the internal resistance of a supercap is much lower then a standard battery.

@theantipope4354 10 лет назад

Dude. Learn the difference between series & parallel. Paralleling capacitors adds the capacitance & leaves the voltage rating the same. Putting them in series doubles the voltage rating but halves the capacitance.

@MrMac5150 9 лет назад

He is a little wet behind the ears, maybe the kid needs to go to school before making a video.

@CynthiaAvishegnath-watch 9 лет назад

The capacitance is the work done to charge up an electron charge reservoir. 1 F = 1 V x 1 A x 1 sec of work done to charge a reservoir. If we stacked five 1 F capacitors in series = 0.2 F stacked, then 1 V will drive only 0.2 A in 1 sec. Capacitance = charge q / voltage V. Given a constant charge q, and a five times voltage increase, will reduce the capacitance requirement to 0.2 F. 5 V maintains 5 times coulomb energy or requires 1/5 capacitance to store 1 time coulomb. But if we increase the charge capacity by five times too, then the stacked capacitance will still be 1 F. As long as we can ensure each of them has a terminal differential of 1V and drive a charge of 1 Amp.sec across each unit that was placed in series, we will be able to bring each of them "up-to-charge" of 1 F each. Therefore, placing 1V DC across a series of five 1 F capacitors would reduce their average terminal differential to 0.2V and hence the reduction in capacitance fulfillment within 1 sec of charging. But if we increased the voltage to 5 V, then we would be able to maintain the ideal 1V terminal difference. However, unless they are self-regulating or externally balanced, we cannot ensure that elements placed in series will each have the same terminal differential as the others. Therefore, we can charge them in parallel to ensure a 2.7V terminal differential during charging, and then discharge them in series. As long as there is charge in each capacitor, and a terminal differential, current will flow. So there is no point in thinking about in-series capacitance reduction, when we have strategies to charge each of them at 2.7V ! ! ! For a given current, the higher the voltage, the lower the required capacitance. Capacitance is not the charge capacity of a capacitor.

@bullshyte8345 9 лет назад

Cynthia Avishegnath You learnt him sumthin good.

@MrMac5150 9 лет назад

Bull Shyte You need to learn how to spell.

@bullshyte8345 9 лет назад

MrMac5150 Since there is no smiley face attached to your comment or a +1 for me I will explain. Lionel wrote " *Learn* the difference..." and I thought she had "schooled" him. So there's the insinuation explained mate.

@madelectronengineering 11 лет назад

I've played with joule thief's before and had fun with them and LED's. A more robust and easily implemented dc boost converter for small current draw is the NCP1402 chip. I use it all the time for small current low voltage boosting.

@atarileaf 5 лет назад

would a super capacitor be a suitable replacement for older pc motherboards that use those old barrel caps to hold the CMOS? They always seem to fail and leak destroying the board.

@davidmilunic 9 лет назад

Nice demo! The only technical issue for the booster is switching it in and out of the circuit during the charge/discharge cycles. A double pole, double throw switch would work nicely. A quick and dirty way would be to have quick connectors input to the booster with a female connector and the output from the booster with a male connector. This would allow it to be placed in line and in the correct direction very easily. It could also make it easier to experiment with switches...

@davidfarmer2049 7 лет назад

So 1) is this a good application for a insect zapper where you need a lot of juice to zap the fly? 2) you could use a wind up troch to charge the capacitor 3) do you need to be careful when handling capacitors for electric shocks?

@aadkkubangpasupencegahan7836 7 лет назад

Hi sir...good presentation...😊 I have a question...what happen if we keep charging the capasitor...does it blow up?..

@pdfdan 10 лет назад

Capacitors are already used in consumer electronics instead of rechargeable batteries. They are used where very quick charging is more important than capacity. Search for capacitor flashlight (a few of them are DIY projects, but many are commercial products). Search for Micro Chargers LED Light Racers for a toy that uses capacitors instead of rechargeable batteries. The inefficiency due to internal resistance is negligible, which is why you haven't burnt yourself on a charging battery. Waste energy turns to heat, and not much is wasted. Batteries beat capacitors by huge margins for price and for charge per weight (or per volume, which is why you see them only used where very quick charging is important.

@clown192 10 лет назад

How long do the normal rechargeable last in comparison? Iif you had a bank of capacitors, say 4 of the same and charge to the 5v would it last twice as long? or is it the voltage that disperses at the same speed no matter how many capacitors are plugged in?

@GearGuy 2 года назад

Great video, but a few questions: A little confused when you said that two of 360F caps could probably run the radio for 30 minutes…. If the two 10F caps ran it for 2+ mins, then wouldn’t the 360F ones run the radio for 36 times as long (aka 72+ mins)? Also, how long would the 360F caps hold a full charge for? Like after a month, would they still be able to power the radio at all? If so, what percent of time would you expect vs when freshly charged? A more general question: I always wonder what low self discharge means in the real world… I only see people quote capacity after a few says at most… do any caps hold charge for a week, a month, etc?

@madelectronengineering 11 лет назад

I agree on staying low voltage and stacking the caps in parallel, much safer.

@jimedmiston6190 8 лет назад

You could run a DC-DC voltage booster between the caps and the radio to get closer to full utilization of the capacitance. There are a lot of 1V-5V boosters out there with over 95% efficiency in the sub-five dollar range that can easily handle the amount of current your radio is using. A bypass circuit made with diodes would allow you to charge the capacitors using the same hand-crank method.

@klemens33331 8 лет назад

A big "HI" to you wise man! I have got a crazy question. When I turn on the motor of my Nissan X-trail, my Garmin GPS (Nuvi500 has no battery) turns off, because the starter drags down the car battery voltage to 8V. Thus, I series soldered a 65000uF/25V electrolytic condenser and that allows to bridge the momentary min. 300mA/10V power loss. Question: is there a way of using smaller condensers, such as using super capacitors? I bought some o.47F/5V5, but when I connect 3 of them in series the GPS ignores them. How come?

@mojojomo6750 10 лет назад

It would be relatively easy to detect when your caps are being charged and automatically switch from series to parallel & back again when you're done cranking, using a few miniature latchable relays and one or two other components.

@rwhirsch 11 лет назад

does the radio care about the voltage input? is there an upper limit to not damage it, or does it have some kind of controller built in?

@wellspringandrew 11 лет назад

I've just become curious about ultracapacitors and found your video. I need a reference point. How long would it take to fully charge the original battery (cranking) and how long would the radio run on a full charge? (I apologize if you already answered that. I skimmed through all the comments and couldn't find it).

@wellspringandrew 11 лет назад

Thanks. 20 hours playing time and 4 hours cranking with the capacitor. Does that mean it would take longer than 4 hours to crank the original rechargeable battery?

@wraith0127 11 лет назад

So, the bigger, heavier, longer to charge NiMH batteries gave nearly HALF the run time of the super caps? I bet that once the cost of making capacitors comes down (as it inevitably will) we will be seeing nearly all our rechargeable electronics using super caps in place of batteries. Including cars, cellphones, etc. Question, if you wire caps in parallel, will they act like batteries in parallel? Meaning more run time at the same voltage?

@madelectronengineering 11 лет назад

The radio does have a low voltage cutoff, but it continued to run all the way up to 5vdc. I didn't want to push the voltage up much more then that as it may blow up some of the circuity of the radio. Just keep it in the operating range of this radio (which is 2.9v to 5v).

@madelectronengineering 11 лет назад

You have uf=microfarads and F=Farads mixed up. a 1000uf capacitor would light a white led for a fraction of a second. supercaps above say 1-5F have an upper voltage range of 2.5-2.7vdc.

@phrankus2009 10 лет назад

I would like to see how connecting the capacitors in parallel to the regular (factory stock) battery pack might enhance the performance. ... It seems like the capacitors would act like a charging "reservoir" and would soak up any transient "spikes" in your manual charging output ... SO ... In addition to adding capacity to the total stored charge (milli-amp-hours) the capacitor SHOULD also add efficiency toward absorbing and storing any sharp spikes from the crank-generator whereas those spikes might be wasted as heat by the SLOWER uptake of the chemical batteries ... Hmmm ... Just a thought. ... Of course, over the course of an hour, you might loose all that faster capacity due to leakage. ... another big "hmmmm".

@pianoman42421 10 лет назад

Hiya, why not charge the caps with the dynamo and then discharge the cap to the battery? Would that be quicker? Plus arnt 2 capacitors in series with the same values half. I.e 1/((1/c1)+(1/c2)). In this case 1.25 F.

@ytalanwms 10 лет назад

Just goes to show you that really, the energy used to crank is worth 2.5 minutes of power at 30ma. Larger caps do not change that - They will also only give you 2.5 minutes of play time for 1/2 minute of cranking. Maybe less if the leakage is higher.

@flexairz 10 лет назад

They are not interchangeable as the discharge characteristics are totally different. On top of that, caps use static electricity where batteries use a chemical form of storage.

@bakupcpu 11 лет назад

You could get a longer run-time using a little dc to dc boost converter to fully discharge the super capacitor and also you could have it to run on 1 instead of 2 also if you want to use multiple in series you might want to add a balancing system in there to prevent one cap to be overcharge. Thanks for sharing! Great video also :)

@robinwkhwkh 7 лет назад

i would like to know can i connect the solar board directly to the 500 farads capacitor. I am afraid of the capacitor will be overcharged and then result in explosion or damage to the solar board. Will capacitor stop charging itself after it is fully charged?

@tammyeagle5287 8 лет назад

do you think it is possible to run solar/wind energy charging to batteries for nightime use and run electric off of semiconductors same system during daytime use?

@Justwantahover 8 лет назад

I want to make a supercapacitor hoverboard (if you can get a lot of charges out of them). How big would the array of supercapacitors have to be to make a 70,000 watt power drain, last 30 seconds? lol And would an array that size easily fit into a hoverboard (like the size of a surfboard)? And how many charges do supercapacitors handle before they wear out?

@MrOldclunker 10 лет назад

Just wondering if you were able to get the larger capacitors to work on the radio?

@bjl1000 6 лет назад

You need a DC-DC convertor to keep the voltage constant, to utilize the full charge of the capacitors.

@kieferonline 11 лет назад

This is a great idea! Hey, what's the life expectancy of a capacitor. I mean...how many times can you recharge it? Does it ever stop holding charges?

@archangel20031 8 лет назад

So, lousy run time than batteries for the same physical size but I'm sure they last much longer no matter if they are charged or not?

@fabulousfabrications1985 8 лет назад

A capacitor is good for maintaining steady constant current flow when power is being used it's called capacitive discharge so you don't get variations in voltage like in a high output lamp!

@douglaskay9959 8 лет назад

+Phoenix Marzrover Not true, the discharge and charge are rapid at first then gradually slow down.

@sbeer6er 11 лет назад

how long does it take to charge and discharge the regular batteries?

@MrKONFLIK 8 лет назад

Interesting concept. If you could connect that to a constant charging system (like, say, a bike chain), you could make a very cool, electric, auto-charging bike (that is, if you have the chain constantly charging the supercapacitor while in motion).

@JustWasted3HoursHere 8 лет назад

I guess I missed it, but how does that compare to the original battery, as far as how long it lasts with the same stored energy to start? JW3HH

@brainplay8060 10 лет назад

Could you do one of these using the built in LED light? I'm also curious about the mini-usb port that can be used for charging items. Would that still work to charge a phone? I've been looking these emergency cranking machines for a while but having had other cheap hand crank chargers with puny batteries, was put off by the idea. There was always a LOT of cranking involved with those things with so little return.

@yosefmacgruber1920 7 лет назад

What do you do to protect from over-voltage that would be more possible via capacitors than from batteries? I do suspect that something like super-capacitors should soon obsolete batteries.

@BrokenCapo 11 лет назад

nice test... haven't seen anyone do this and was wondering how long those things would hold

@gusgusingpintor186 10 лет назад

So, are they disposable? or can you reuse the same capacitor over and over? Sorry for the noob question.. :)

@technologypros8281 10 лет назад

Capacitors are reusable and last thousands of charge/discharge cycles.

@gusgusingpintor186 10 лет назад

Wow! Thats very useful.. if only they could last hours in small packages like normal chemical batteries..

@madelectronengineering 10 лет назад

TechnologyPros depending on how hard thay are used more like 100,000-500,000 cycles. In low amperage loads the amount of cycles will be higher.

@madelectronengineering 10 лет назад

dennis calag This may become a reality one day if they ever commercialize graphene.

@drbatt5141 10 лет назад

They are also biodegradable, fairly cheap to make, and holds more charge. It would also cause battery companies to go bankrupt, and because some of the companies "donated" for Obama's campaign, (In some really stupid logic), they are above the law, and they can prevent to commercialization of graphene, because you don't have to buy graphene over and over again, like you do batteries. Until we do something about this issue, graphene will not become commercialized.

@metalfox1911a1 9 лет назад

What's the difference between ferrets and amp hours. I wanted to switch my scooter from sealed lead acid batteries to lithium-based batteries but would supercapacitors provide even more power or with a discharge with to rapidly to be practical for use.

@Jakefrc 11 лет назад

The led's wouldn't put out the optimum wavelength of light for the solar cells to generate power so it more than likely would not work. Intensity is not the issue its the frequency and wavelength of the light as led torches (I assume this is what you are talking about) are designed to output a different light to the sun as they are purely to help us see.

@whosthatwhodu9387 11 лет назад

Thank you for beeing my instructor. What would it be when you mix the supercapacitor with Lithium-polymer accumulator in layers?

@madelectronengineering 11 лет назад

i wouldn't try running it off of a joule thief as they are unregulated boost converters, you risk overvolting the unit when you shut the power off. As for the mAh rating, that sounds about right. So if we used 2-350F capacitors in series for 175F of capacitance, that would give us about 41.475mAh, much more reasonable.

@dronebeard2886 8 лет назад

Hey, can you help. I am trying to get a supercapacitors to charge my lipo battery 11.1v 1300mAh. whats the best setup? Should I go for a lower voltage supercapacitors with a boost convertors 5v to 12v maybe. Thanks

@Porama6400 10 лет назад

Hey Do you know Multimeter or volt meter has high resistance if you use it with LED It can run only 1 minute Maximum

@VLS-Why 8 лет назад

If you wanted to use the full capacity of the capacitors couldn't you just use a boost converter with a regulator at the output of the capacitors so it keeps it at 3 volts?

@Jesporna 11 лет назад

If you are using the car it will overcharge right? Do it has protective measure on it?

@whatthefunction9140 8 лет назад

Doesn't connecting caps in series actually decrease the total capacitance?

@chriswesley594 8 лет назад

Yes. COnnect them in parallel to add capacitances. But her wanted 5 volts, so the voltages add in series, but the capacitances detract.

@whatthefunction9140 8 лет назад

Chris Wesley 1 cap with a boost circuit would be good.

@TheProCactus 8 лет назад

Yes, but he knows this, lol 2 x 10F caps in series = Twice the volts and half the Farads.

@modelnutty6503 8 лет назад

same capacitance higher voltage is all, like any battery in series prettymuch. same series parallel rules still all apply. looks like the issue is the unit he's driving cut's out when voltage drops some, when caps are half drained. 3 caps in series then a simple regulator (8v in regulated 5v out) would solve that and run longer (till the caps drained below about 1.7v each).

@chriswesley594 8 лет назад

Absolutely wrong.

@bobo888bobo 11 лет назад

a regular voltage regulator is not very sophisticated. I think the the excess voltage becomes heat in the heat sink. so if you had a power source (battery, capacitor) at 7 volts and a 5v regulator then the extra 2 volts goes to heat and does not help the light run longer.

@JigsawCrisis 9 лет назад

Battery: 3.6 v @ .6A = 2.16 Watt/hours Each cell of the battery is 1.2 volts nominal (~1.35 volts charged). 3 cells = 3.6 volts (~4.05 volts charged) The units cutoff is 2.9 volts (~0.96 volts/ cell)... Since a typical NiCd cell is nearley completely discharged and still above 1 volt/ cell. This cutoff is fine for a 3.6 volt NiCd, and does not affect its delivered capacity of power to the unit. Calculate power in Joules: P(W) = E(J) / t(s) ... 2.16 = E(J) / 3600 s... E(J) = 2.16 x 3600 = 7,776 J 3600 seconds are used because that's 1 hour. 1 Joule = 1 Ws (watt/second). So, 1 watt per second is 3600 Joules. That's the Joule-Watt relationship. (Doing this because Joules are used in capacitance power calculations) 2.16 Watt/hours = 7,776 J

@brejso 11 лет назад

So, @njsharkracer did you get another 350F cap? Did you make a video with the two caps in series?

@JerryEricsson 8 лет назад

I have a couple of watches that run on solar. The older Casio says on the face that it is capacitor run, the cheap junk watch from China doesn't say much of anything but I am guessing it too has a capacitor in place of a battery, so this has been around for quite some time.

@suoppsdn9751 9 лет назад

Maybe use resisters so the capacitors has a lesser voltage leak. It might grain the capacitor a little lesser. Might last a bit longer. Capacitors are designed to discharge fast so maybe a resister will make it discharge a little less slower.

@madelectronengineering 11 лет назад

Yes and no. If your looking at how much power was absorbed by the rechargable battery VS supercap, the supercap will absorb more of the charge from cranking for one minute since it's internal resistance is much lower. On the flip side the rechargable battery still has much more energy density then the supercap. This is why supercaps will still take up a lot more space for the same charge density then batteries, but it's getting better every year.

@steve42lawson 7 лет назад

You'll get far more energy transfer (far more efficient) if you use the supercaps to drive a switch mode supply. I've been able to run the caps down to 0.5 volts and still supply 3.3 volts. Also, when the caps are above the target voltage, you will lose far less power due to heat dissipation. Also, you can use a parallel capacitor arrangement, and avoid the need for charge balancing.

@knglaser 11 лет назад

those caps sure are amazing. to calculate the actual energy used in that voltage range, you can convert it to joules and compare the different states. 5F 5V = 62.5J and 5F 2.9V = 21J so you are utilizing about 66% of the energy capacity, wich is not bad. a circuit called the joule thief could pull it down to 0.7-0.9V but the output voltage is unstable.

@elrojoJazz 11 лет назад

Great video! Love the crank generator idea to charge a super capacitor. Idea for you: Can you make a video of a Bicycle powered crank generator to charge a series of Powerful Super capacitors. You could charge your house with your daily work out!

@Cineenvenordquist 11 лет назад

See the specsheets; Tesla have both, but because batteries store more power per unit volume and are not destroyed outright (and discharged) by temperatures above boiling or below freezing they are perhaps more suitable as 'tanks.'

@timothythomas1345 8 лет назад

Brother I have a upc 500 I picked up free what type of capacitors do these upc machines have ? Are there any useage out of them ?

@ihtsarl9115 2 года назад

Thanks for sharing this video. I think It will take a long time to charge the large supercapacitor.

@paulschneider9978 10 лет назад

i found the selfdischarge to differ greatly. The maxwell caps with the terminals on one side hold their voltage amazingly well, the once i got where the leads are on different sides are not so good and those chinese Hy-Cap's are quite bad regarding selfdischarge (ok i had only one new cap to test this).

@infowolf1 8 лет назад

aren't those the kind of capacitor that can blow up and put shrapnel in you?

@madelectronengineering 11 лет назад

remember the human body is relatively safe from voltages below 60 volts. this is why you can touch both terminals of a car battery that has hundreds of potential amps that could cook you in an instant but the voltage is too low to overcome the bodys resistance.

@jeronimomurruni 10 лет назад

Which is exactly the name of the supercapaditors?

@madelectronengineering 11 лет назад

Honestly I have no intention or interested in perusing hybrid systems. I'm more interested in finding ways to use supercapacitors at full replacement for small power consumption devices. Not to mention that adding a Li-Ion battery into the mix also requires another part of the circuit just to control the charging of the battery. Also Li-Ion batteries have a lifespan of 3-4 years, where as these supercaps are potentiality good for 20+ years.

@rich1051414 11 лет назад

What about using capacitors as a voltage overflow storage so one could crank faster to get a faster charge, and then the capacitor charges the actual batteries at a rate that their internal resistance allows? I guess this would only be as helpful as the number of capacitors used, and you would have to switch it offline when the capacitors reach the maximum voltage limit, and would become less and less useful the higher the battery is charged...

@VENDINGMEXICO 10 лет назад

where did you buy those super capacitors and how much cost??

@Mark-gm5mu 10 лет назад

how long does the battery last when charged to 5 volts and playing radio,,,

@homerjones6860 11 лет назад

How long will the cap's last? or how many times can you recharge them with out the caps going bad? What size caps would your radio need to run or play for 1 hour? and what is the cost of the super caps of this size and cost for 1 hour run time. Thanks

@ScottsSynthStuff 9 лет назад

Your test isn't really valid for this application - the power draw of the radio is extremely variable. The major power draw inside the radio is the power amplifier for the speaker. The louder you have the volume (and the louder the signal being played), the more current it will draw, and the faster it will draw down the capacitor. Also, when you connect capacitors in PARALLEL, the total capacitance (in farads) is the sum of the capacitance of all the capacitors. This is not the case when capacitors are connected in series. You stated that you had two 2.5F capacitors connected in series, giving you an effective capacitance of 5F. This is wrong. You actually LOWER the total capacitance by connecting them in series. Your two 2.5F capacitors in series actually present a total capacitance of only 1.25F - calculated as 1/((1/2.5F) + (1/2.5F)). The formula is 1 / ((1/C1) + (1/C2) + (1/C3)) (continue to add for as many capacitors as you have in series)

@sacredcreationz 9 лет назад

+gsmac1969 just real quick; he said he had (2) 10 farad caps @ 2.5v, and if you pause the video you can clearly see the label on the caps saying the same thing. Thank you for re-educating this guy on how to series calculate caps... but yes totally right on the variance of power used via radio test. He should have used the LED light on the device.

@fabulousfabrications1985 8 лет назад

Yup 10 f at 2.5 volt ?

@smoke05s 10 лет назад

Wait 500F? How do you charge it without shorting out your charger? The inrush must be outrageous. You sure these are not 500 uF and someone scrapped off the "u" to trick you? and how do they do it in such a small package?

@Loundre3 7 лет назад

Then an current source could be used, which can limit the charging current to safe values.

@kennethflorek8532 11 лет назад

Actually all calculation should be in terms of energy, but I am taking current and time as all that is relevent to determine energy. So putting 600 mA hours into either the capacitor or battery would take the same amount of cranking time. The capacitor in the demo only charges up fast because it is storing so little. Charging and discharging batteries also loses energy in heat, due to the inefficiency of the chemical reaction, sometimes estimated as a 50% loss. I have no idea if there is some such inefficient conversion in super capacitors. The loss in the chemical reaction is a different thing then what is termed internal resistance (which is the electrical resistance taking the battery as if it were a conductor like a wire.)

@justliketolook 10 лет назад

will you do a video on how to connect every thing with the 350 f . from start to finish . And tell every thing about it like where you can find the parts needed and the part numbers of every thing . Thanks

@bjl1000 6 лет назад

The voltage on a lithium battery/cell stays fairley level during use. A capacitor discharge curve looks like a very steep ski jump, not very good for anything.

@frankmmiii 10 лет назад

I have a regular battery charger connected to a lightning rod. When lightning hits the rod it charges up my batteries. Oh, by the way, I have 1.2 million AA bateries connected to my charger. It took a while, don't ask. I also have some nice beach front land for sale on the Moon, right on the edge of the Sea of Tranquility. Great views of the Earth rise and Earth set, depending on which side you choose. Hurry! They're going fast!

@madelectronengineering 11 лет назад

That would be a good setup if you were building a system from scratch. The best price I have found for the supercaps is $11 each plus shipping. Most likely I will get them for $9 each plus bulk shipping for 100 pieces when I go into production.

@kirknelson156 8 лет назад

how long did it run on the original battery pack for comparison.

@JROrg2009 10 лет назад

@R&TPreppers: A far more accurate test, and more reasonable it seems, would be to do the same test with the newer, more"standardized" Maxwell 350 farad 2.7V batteries, not 5 farad ones. The results would likely be more in line with seeing if reasonable discharge times result, etc.

@onehitpick9758 8 лет назад

Capacitance doesn't add in series. Capacitance in series is like resistance in parallel. However, the voltage does stack up. In parallel, capacitance adds regularly.

@suelinerr 8 лет назад

Very informative. Thanks for sharing.

@OldRangeRat 11 лет назад

For the liquid electrolytic capacitors, if used properly, then life time should equal the shelf life of the capacitor. Most high quality caps of this type are 20 years of shelf life. Many of us feel that these types of capacitors have longer lives than shelf life with regular usage.

@madelectronengineering 11 лет назад

All depends on what capacity supercaps I use and what the current draw is on them. In this instance it works out roughly to 1Farad for 1 minute of run time. YMMV.

@chetvaldes 11 лет назад

wouldn't the capacity of the two caps still be 2.5 farads if wired in series, like in batteries?

@MacPherson100000 8 лет назад

Is the supercapacitor anything like the FLUXCAPACITOR???

@madelectronengineering 8 лет назад

+MacPherson100000 sadly, no.

@slap_my_hand 8 лет назад

your intro is too long

@SHEKHAR-lu2rj 7 лет назад

StarTrek123456

@V.Viper95 7 лет назад

SHEKAR 9926331026

@HDRNX 7 лет назад

Eduardo Vera

@Mitch_Rogoff 11 лет назад

What is the difference between a super capacitor and a rechargeable battery?

@kdc43 11 лет назад

A battery, when charging, converts electrical energy into chemical energy and then stores it. A capacitor, when charging, does not convert the energy but stores it directly as electricity in an electro-static field, (stored electrons on plates or metalic film) A battery, when being used, converts chemical energy back into electricity (electron flow). A capacitor, when being used, just directly releases the electricity (electrons) back out to the circuits, in this case, the radio.

@roddeyfrost5816 11 лет назад

Capacitors in series add up like resistors in parallel. Ex: Ctotal = 1/((1/C1)+(1/C2)) Capacitors in parallel add up like Ctotal = C1 + C2.

@waldenhouse 10 лет назад

Can you show us a close-up of the Supercaps please?

@ClownWhisper 10 лет назад

What sort of appliance are these used in.. I like reclaiming things. If I can avoid buying something, im all in

@jeremiahl2552 10 лет назад

you might be lucky to find one supercap in a computer as a replacement for a button clock battery, but i belive supercaps are usually only found in industral equipment where a half second power out could cost thousands of dollars to the machines and production. you will mostly only find regular caps in consumer devices.

@ClownWhisper 10 лет назад

Yeah I came to the same conclusion a bit ago. Thanks for the reply.

@lawls12 11 лет назад

I think he was talking about stock battery that comes with it. How long does that last?

@stana.281 8 лет назад

I have a question for electronics enthusiasts. I am trying to replace a 3.7V 175mAh rechargeable battery that works as a backup power source for my device with two supercapacitors in series. I have tried the following combinations: a pair of 2.5V 2F, a pair of 2.7V 5F, and a pair of 2.7V 10F. They all get charged by the device (to about 4.1V). However, when I unplug the device it just powers down (refuses to work off the capacitors). The capacitors remained at 4.1V. What could be the issue?

@madelectronengineering 8 лет назад

make sure your lipo battery is only 2 pin connection and not 3 or 4 pin connection. if it's the latter, it's also looking for a thermocouple signal on the other pins and without it, it will disable itself.

@tristonwebber9982 8 лет назад

I just threw out a shit load of those things. had them from old electronics I was taking apart,tube amps and such, just recently got interested in electronics on this scale and regret it. still have some tho no time to test em out,mine are a bit bigger tho. wonder what they could power ?

@zig322 8 лет назад

Hi there, at the start of this video you where saying that the capacitors are wired in series and not in parallel, could you please tell us why ? thanx

@orange11squares 8 лет назад

a capacitor has 2.5V. If you put them in parallel you will have 2.5V as well, but if you put them in series you will have 5Volts. Just like putting batteries in series. Two 1.5V batteries will give 3Volts for your tv remote.

@MaxwellsDaemon 11 лет назад

I have a similar setup with a handcrank radio / led light run of two 2.7v 400F caps in seriese. I generally charge it by solar panel in the window. I have LEDs on the caps for balancing. When charged to 5v it will run the radio on a moderate volume for about 10 hours or the LED lights for ~2 hours. Not at all bad.