joe a: This here ladies and gentlemen... is how you destroy your alternator and
possibly much of your electrical system.
Penfold 'OoO': How much money would a capacitor-based car battery save you?
An often-quoted number is that hauling 100lbs around in your car adds 1% to
fuel consumption. If you remove a 30lb battery then you save 0.3% of your
fuel bill. If you are spending $50 per week on fuel (the average for
Australian drivers), this adds up to $2600 per year. 0.3% of $2600 is
$7.80 per year in reduced weight leading to better fuel economy.
Capacitors can be recharged hundreds of thousands (to millions) of times,
unlike lead-acid car batteries which will be dead after one (or two)
thousand cycles (at the most). If you replace your lead-acid car battery
every 4 years, you would have to change the equivalent capacitor-based car
battery every 400–4,000 years. So, in effect, you would never need to
replace it (nor would your children, or their children, or their
children...). Since a car battery might cost you about $100 every four
years, you are spending $25 per year on lead-acid car batteries.
A capacitor-based car battery would thus save you $25 + $7.80 = $32.80 (on
lead-acid battery replacement costs and in improved fuel economy) each and
Over the course of a 50-year driving career (20–70), you will have saved 50
* 32.80 = $1,640. If, on each anniversary of installing the
capacitor-based battery, you added the $32.80 you just saved in the
previous year into a bank account earning 5% interest, when you retire from
driving you would have about $6,900 sitting in the account. Give the
battery (and the account) to a grand-child and get them to do the same, and
they would retire from driving with $85,600 in the bank. If your
grand-child does the same thing, then your great-great grand-child will
retire from driving, with the exact same battery, 150 years after after you
built it, with $989,000 in the bank... Great-great grand-dad sure was a
Moving away from lead-acid batteries makes sound financial sense, provided
you think ahead far enough.
TheLuismondo: Capacitors in series divide the value of 1 of them by the number of
capacitors (if they are the same value)
Capacitors in parallel multiply the value of 1 of them by the number of
capacitors (if they are the same value)
So if each one of them is 350Fs and you have 6, you can either have 2100Fs
in paralel (you need them to be rated at more than 16 volts) or 58.3Fs in
fortyninepages: If this is possible, wouldn't it have already been marketed and sold in
shops as an emergency start up battery? I know I'd buy one. Just needs a
case and crocodile clips.
electronicsNmore: Impressive since the capacitor bank is rated 16.2V / 58 Farads.
Jeff Evenson: 30 years ago-on a 650 BSA Thunderbolt, I got tired of changing battery's
due to the vibration where I rode, so using only 1 large Capacitor with a
zenior diode and it always started on one kick. What the trick here is to
Use them like he does, but with the battery as that way the battery and
starter will last longer due to less voltage drop on first crank.
Andrew Lucky: this is fake, he turned on the car with his keys at 2:43.
T Oadaly: Pretty cool, as long as you don't try running the lights and radio off
battery. ...most people don't anyway, but know that you really can't with
Fennecbutt: And what if you want to use your lights or stereo while you're parked?
Oh wait, this is America...you just leave your gas guzzling Hummer
John Wiggins: I have a new found respect for capacitors...
John Doe: I hear you talking about possibly making a hybrid battery. If you are
considering any lithium ion type cells be very careful how you charge them.
When charged and discharged wrong they can explode or catch fire. I am
not trying to say that you can not use them safely but if you want to use
them like that safely you will need a specialized charging circuit. You
might even need something custom made because lithium ion can be fussy
about how you charge and discharge them. If you do decide to use them I
hope it works safely. Lithium ion cells are lightweight as you might
already know and so that is one reason to consider them but I would be
scared to use them in my car unless it was made for them. Capacitors on
the other hand seem much safer.
costiqueR: I think that the people don't know that the batteries are just big
capacitors , having exact same behavior on same dimensions/capacity. Guys,
don't discuss about this, the differences between capacitors and batteries
are coming from their fabrication technology.
Capacitors :1 F = 1 s4·A2·m−2·kg−1 = 1A*1s/1V so for 2 V (14V-12 V
interval) you need 2 F just to have 1A current during second.
Car battery: 100 A·h can deliver 5 A over a 20-hour period at room
temperature for same 14V-12V interval..
Let to discuss about 55Ah common car battery. Normal voltage for charging
is 13.5 V maximum 14 V and the lower limit is 12 V so you have 2 Volts
potential difference to work. 55Ah means 2.75 A in 20h. To obtain
equivalent capacity from capacitors you need 2.75A*20*3600s for each volt
so result is multiplied with 2. Result? 2.75*20*3600*2= 396000 F (Farads)
In this movie we see 6*350F=2100 F which is 200 times lower capacity of
the car battery.
What means this? Simple. You can start your engine with a capacitors
module, but just if everything is perfect and you are sure the engine will
start from first attempt. Don't expect to have energy remains for the
second try...or let calculate: starting current is 20A so you need 20*2=40F
just to have energy for a second. 2100F (total)/ 40 F => 53 s of full
functionality. Not too bad but sure not to change the car battery. So ...
Car battery is strong recommended, you can have a capacitor module just to
help the battery or to start cars with depleted batteries. Don't forget:
car alarm and other electrical devices have working nonstop so capacitors
will be depleted if you don't start engine often...
Izzy Blackout: I've seen the datasheet for that caps, the maximum operating temperature is
65 degree celcius. Need to be extra cautious with that because i think the
engine could be running higher than that. You probably don't want the
capacitor to blow up cause if the caps blow up, it's gonna get nasty
Dylan Thorner: Cool! I plan on making a cap bank like this for an inverter. Thanks for
Cynthia Avishegnath: A supercapacitor is not actually a capacitor.
It is an electrolytic oxidation reduction process, in which the electrodes
are not chemically involved.
It is a pseudo-capacitor, using battery technology. But because there is no
ox-redux on electrodes, charging/discharging is phenomenally higher than
Without playing with words, it is actually a battery. A battery where
technology has managed to decouple the electrodes from the electrolyte.
Therefore, it is not like the usual electrostatic capacitor, because you
cannot reverse the polarity. Therefore, you cannot use it for analogue
circuit boards without biasing and limiting the whole circuit to its
Because it involves an electrolyte, *it has a limited lifespan*, unlike
electrostatic capacitors. The lifespan of a supercap is probably between 5
- 10 times that of a lead-acid.
It is not actually a capacitor. It is a pseudo-capacitor. It is a battery
that *somewhat* conforms to C = q/V.
There will come a time, when voltage latency will be prolonged in such
supercapacitors or in alternative of nanotube technologies. When that
happens, its voltage profile would no longer conform to C = q/V but to
usual batteries, and then could we still call them "capacitors" ?
We have to wait till the engineers at MIT perfect their graphene nanotube
capacitors. What are they doing? It's been 3 years since they announced it.
Or was it 5 years ago? No progress? Are they selling a pipe / tube dream?
Jim's Computer Tech Reviews: Love the vid, too bad I couldn't find your same ype of pack premade to
buy!! love your boost cap vids!
Ken MacMillan: What's the point of this?
Adam Colon: I'm confused what the point of replacing the 12V battery with the
You lose the consistent reliable features of the battery.
Is the upside simply that it's smaller and lighter?
Is it worth it?
Leslie Willoughby: One thing to note: He started on 10v in this video-neat but low voltage is
extremely harmful to a starter. Obviously depending on the crank time, and
the starter load but low voltage will actually heat up on the brush end of
the starter and melt the solder out of the commutator bars.
The car's computer is maintaining a memory and that is what pulls down the
caps. It is usually about a 1/2 amp load-continuous. You could probably
remedy that by throwing a solar cell on the dash.
It gave me some ideas....
anubis1100: one thing im worried about with this pack is the energy overload of the 350
farad caps when the alternator is at high output. i know when you
overcharge a capacitor it has a tendency to blow up. the 2600 farad caps i
can understand them not blowing due to the high energy storage, but the
smaller 350 farad ones dont have that kind or leeway.
Chevez E: So can I hook these up alongside my regular car battery? I have room for
both and would just like to be able to start my car in -40c weather. My
biggest concern is that the caps will end up discharging while i'm away as
I usually let my car sit for weeks at a time. So that's where the regular
battery would come in handy to keep the capacitors topped off. Solar panels
arn't an option either because snow.
Also, I imagine that I would need to hook this up in parallel with my
battery to prevent doubling up the voltage?
stonner2k: what would you have done if on Monday morning on the way to work it didn't
start up?? would you have just jumped it with one of the other ones? I also
take it you could carry one in the boot or trunk as you would say as a
buster just encase you ever need a buster?
bruce kazakos: the radio does not consume that much current,but on the other hand,if you
switched on the heater,or the lights,well that is another story.
AVLMTC: you are able to store more energy into batterys vers caps
Steve smith: Caps have a habit of biting you if you touch the terminals.
Justison Maynard: now make some kinda hand crank to recharge the capacitors and i'm sold ill
buy 10 of them....
mele host: You could get one of those lithium-ion car starters is case you need to
jump start the vehicle.
TremereTT: btw. you don't need to put eggs in the fridge, if you don't wash them! eggs
have a natural protection coating that preserves them, just don't remove it
by washing it off.
you won't eat the egg-shell anyway.
jeff king: And the results of 9mth test is.....?????
Jim's Computer Tech Reviews: Very nice videos? where might I be able to pick up one or three (or more?)
BreeUSA: I spy a Citicar in the background. Have you done anything with it? I have
a 1974 Citicar i'm restoring.
Michael Carouth: Replacing Car Battery with Capacitors! 12V BoostPack Update
---This guy, Lasersaber, has a cool Youtube channel with lots of neat do it
yourself science experiments and useful projects.
Those supercapacitors are available at Amazon and such. Just put enough
together to get the voltage you need--- like you would with batteries.
CogitoErgoCogitoSum: And when your car has trouble starting that one cold morning? You try
starting your car a few times and your capacitors drain of all charge.
Then... youre freaked.
Stash Murawski: where can I find them on digikey???? Please
Scuba Jamaica: http://laserhacker.com/forum/index.php?topic=18.30
Quote: Reply #35 on: April 04, 2013, 06:22:56 AM »
"It will start my car fine but while the car is running it discharges for
Did you ever figure why this happened?
GrafKrolock82: Oh my... at one point i scrolled to 07:12, heard the sound and thought:
"Strange cranking sound"... and then i realized "Oh, chicken..."
Robert M: Couldn't you hook it up to your air conditioning or car stereo instead
might be safer.
Elizabeth Sainog: How is your capacitor array in very cold temperatures? A lot of batteries
get sold where I live on the 1st cold snap like -20° to -40° celcius. Do
you think that your device would have the capability to start the car in 12
hours in that tempurature providing the engine block heater was on 4 hours
a head of time? How about no block heater? Do these capacitors lose more
more at lower temperatures?
Dott. Julius Hide: hehe beautiful SC ..
Gnik4144 .: Maybe it's just me but I didn't hear the car start...
Miodrag Zizovic: This post have been changed due my wrong assumption about working
principles of super-conductor. I apologize to video poster and others to
which found my post correct, and also I want to thank Sara Hearth and
oldwrench2000 who corrected me.
kirby wade: Most people don't know that the batterys sole purpose is to start the
engine and run electronics when the key is in the acc and on position when
the engine is off. Once the engine is running the alternator powers the
vehicles radio, lights and engine control computer. The alternator also
keeps the battery charged, and in this instance the capacitor bank, doesn't
over charge it via a voltage regulator. Also this technology is already on
the market but as a battery jump box, some have deep cycle batteries and
others have capacitors which like a deep cycle battery can hold a charge
for long periods of time.
thomas smith: hmm this a great idea for race car drivers
Tim the car guy: So they recharge with the alternator?
jahnkeanater: All those eggs. makes me wonder if you know how to basic? lol
Brian Sinper Gx: I think its genius how you mange to put this together, noting that you have
a rather small car, however different vehicles require different voltage
to get a crank. Considering that different climates play a difference in
how your battery react.
Susan Chen: energy = .5 C v*v=.5 x 350 x2.7x2.7 , six capacitors series connection so
C=1/6 * 350
but voltage =2.7 x 6 total energy = .5
so energy storage is still 6 times of single capacitors, series connector
capacitor reduce to 1/6 but voltage 6*6 ,
Christian Curry: That dangerous they could explode
lou holis: Wornder how this would work in the chevy volt & help in electric range,
weight would be reduced , there is no starter in the volt just an on off
switch. Might have to give it a try since GM is using a 150 year old
tecnology 50# battery in a futuristic car.
SonofGodly: where can i get one of those cig lighter volt meters?