Replacing My Car Battery With Capacitors! 12V BoostPack Update




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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 every year. 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 smart fella. 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 series.

Cynthia Avishegnath: Low end lead-acid car battery = 12V x 24 Amp Hours. = 0.15 cubic foot = 18 lbs = $65 Lead acid cannot be discharged below 1/3 (33.3%) without damaging battery. Therefore effective amp hour ~= 16 Amp Hour @ 12V. ============ Compared with ============ 12 V x 1 amp hour = 5 x 2.4V (overvoltaged at 2.7V) x 3600 amp seconds = 5 x 3600 x {1 Farad 2.7V boostcaps} = 36 x { 500 F 2.7V boostcaps} That is presuming we overcome the series capacitance being reduced by using a regulator/switching circuit. 12V @ 16 Amp hour = 36 x 16 x { 500 F 2.7V boostcaps} = 576 { 500 F 2.7V boostcaps} = 576 x 0.0028 cubic ft + spacing allowances ~= 576 x 0.003 ~= 1.73 cubic ft = 576 x 0.15 lbs = 5.4 lbs + 2 lbs of harnessing frame + 1 lb of charging/discharging regulator / switcher = 8.4 lbs = 576 x $15 = $864 + $50? homemade regulator / switcher + $?? homemade frame. Without the regulator / switcher, you would have to multiply the number of boostcaps by 5, which would make your supercapacitor battery-replacement array heavier than the battery being replaced. Not to mention the size. The regulator would be a 2.4 V - 12V step-up / step-down charge / discharge. Efficiency of regulator = 90% ? at most ?? So you have to add 10%, 15% more boostcaps to compensate. The alternative without the efficiency loss is an intelligent parallel/series charge/discharge switching circuit. Also, you SHOULD NOT charge boostcaps in series without a balancing circuit across them, to ensure their 2.7V individual threshold is not violated. The balancing circuit will cost you either efficiency (passive cct) or extra money (active circuit). You seem to be oblivious, not only to the reduction in capacitance but also to the damage you are risking in charging the supercaps, when placed in series. Hours of happiness constructing an expensive over-sized battery replacement = priceless. Damage due to charging boostcaps in series = ??? ===================== Now compare with $350, 150 Amp Hour, 100 lb, 0.75 cubic ft high end battery.

David: Current price for this is about $8 each. (At 2.7V) you need 5. Total $40 out the door. OR $110 (add $15 Calif. recycling fee) for lead battery every 5 years. Acid to your landfill. LEAD to your rivers/fish. Your planet? NO WAY HOZAY.

electronicsNmore: Impressive since the capacitor bank is rated 16.2V / 58 Farads.

Max Power: I see a lot of negative comments but where is your REAL WORLD experiments on the matter??? Look up supercap experiments on the web there are a lot of experiments going on and even items for sale so it must be working for someone just as it is working for him and his car.

Andrew Lucky: this is fake, he turned on the car with his keys at 2:43. 

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.

Adam Colon: I'm confused what the point of replacing the 12V battery with the capacitors. You lose the consistent reliable features of the battery. Is the upside simply that it's smaller and lighter? Is it worth it?

deadboy600: Sure it starts a mouse engine in a Scion. Try that crap on a V8.

Loren Husky: Damn man. My car won't even think about starting on 10 volts.

lerch25: It might even be better for the computer because it should really flatten out any ripple coming off the alternator.

David: Don't let any troll skew you to think this cannot be made cost effective. The industry has a reason to keep YOU dependent.

Mallrick: well i dont think the alternator will charge this..loll but if your baterry is dead and u dont have anyone to boost its realy nice!! i need 1 for emergency

Llia Olsen: My question: At idle rpms, in traffic, at night, with lights on, raining, with wipers running at least half speed. Will the Alternator provide enough power to keep the caps charged under those conditions?

Stephen Furr: I agree... I saw the terminals on the other end getting close to the steel battery mounting plate and thought "That would suck if he shorted that to the frame." Then he wrapped it in a sock to insulate it. (Face palm)

craig zale: Love the farm animals in the back ground saying "Don't do it it's a trick!" What does this do for the charging system strategies? How about baseline reference voltages. It's your car good luck, we will be watching with interest. You may want to buy an extra fire extinguisher. 

chrileman16: that's one quite ass car!.

Pedro Bermudes: capacitors, the new battery.

Presto Chango: how did you touch both leads at 0:40 without getting electrocuted?

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.

jozzerful2: I was just thinking what about the power been returned to the battery via your alternator, ordinarily your alternator, will give your battery power to charge, and you will still have some power left over, what way would that wok regarding that ,would it not burn these cells out, i think it would be better if you designed it for an emergency if your battery goes flat, you could have something, nice and small like that in the boot of your car, i know you are already able to buy, these things but not as cheap and as small, what is , your opinion regarding this matter ?

Sven nniss: That's cool but totally pointless as one user said you'd have to charge the caps up so if your out for a few hours those caps will be long discharged and although caps can constantly recharge and discharge millions of times there's always a possibility of blowing or a faulty cap not lasting as long whereas a battery has warranty and 99% reliable. Also now batteries for cars become smaller and more powerful this is kind of useless. Though I've heard Mazda has capacitors they say when you break this charges the caps to use that energy to take off again? So it still has a battery, but it's not voltage you use to take off its mainly more fuel you use constantly stopping and taking off where 'coasting' to avoid this is more practical. Also test those caps while your driving at 110km/h the alternator will probably blow those caps, test using lights a/c sound system high beams those caps will instantly die

Marcos Borges: bien, no es todo pero ya es algo, la baterias son muy malas al planeta! tenemos que encontrar forma de reemplazerlas ya! Saludos!

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 idling...

John Wiggins: I have a new found respect for capacitors...

Anurag sharma: i just have two questions..... 1) what will happen if i park my cars in garage for 5-6 weeks with boost caps inside, will they be still be able to crank. 2) are they safe for alternator and other cicuitory, what if they blast up? what if they put extra load on alternator, what if they start leaking current?

E. Radler: think you should mention some precaution connecting some charged electric storage to another. You have to use resistors allowing voltage balancing...

Jeremy Burleson: Will your alternator charge the capacitors or do they just die out?

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 these. 

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.

Leo Etcheverry: How was it after use ?

twistedyogert: Batteries have poisonous chemicals, could boostpacks replace traditional lead acid batteries

Onofe Eromosele: I wanna buy some eggs, please!!

Marcos Borges: mmm, se me ocurre algo, y si pusiera en sistema con ladrón de Jouly para autocargar los capacitores, ¿funcionaría?

XDrako: Just like resetting your modem guys. Gotta leave the power off for 30 seconds to let the capacitors discharge. I don't think this would hold overnight.

Dylan Thorner: Cool! I plan on making a cap bank like this for an inverter. Thanks for sharing.

Anders Karlsson: I think that the hybrid version would be very interesting. A small battery to keep the voltage over time, and a capacitor bank to give enough current to easily start the car.

Ken MacMillan: What's the point of this?

TheBikemaster94: what would you do for overcharge Protection? I plan on building one from Li-ion batteries using 2 12VBattery holders that take 8AA batteries each.

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?

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

SWORDMASTER FULLMETALJACKET: DUUUUUUUUUDE! U NAIL IT! CONGRATS MAN, WELL DONE!!!!!!!!!!!!

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.

tomaramudarurls: 2:48 he's talking to the chiken

Jay the Great: *shudders* How can you be so close to those... birds?
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Replacing My Car Battery with Capacitors! 12V BoostPack Update