Supercapacitor to jump start an engine

[graygun]

I hadn't seen or heard of this.

short clip from the ever-exuberant Scotty Kilmer...

https://www.youtube.com/watch?v=cq3ihYJ4rbE

 

[Fox Mike]

So, after all the noise what does it do? All he did was wave around a yellow box. Never connected it to anything.

 

[graygun]

It's a back-and-forth: Connect it to a battery that is too weak to crank the vehicle but powerful enough to charge the cap. Use the charged cap to crank the engine.

 

[Pat-inCO]

I use a capacitor when I need a specific voltage, but VERY limited
current. For example, if you have a NiCad battery that does not want to
take a charge any longer, you hit it with 12V and the current in a large
capacitor. If it had what it commonly called a whisker that keeps it from
charging, said whisker is burned away, without ruining the cell.

Try to start an engine with one? I seriously doubt it. The capacitor would
have to be MANY times the size of the battery, and could not fabricate
current that was not in the source.

Electricity is simple. You do not get something for nothing.

 

[Colonialgirl]

:roll: :roll: What a loud mouth moron who takes forever to explain and demonstrate anything ! :shock: :shock:
:wink: :mrgreen:

 

[Colonel Daddy]

Sounds like a used car salesman doing a TV commercial :?

 

[Jimbo357mag]

Those little Lithium batteries will start your car and charge any electronic device. My son has had to jump start his car a couple of times when he left the lights on.

https://www.walmart.com/ip/68800mAh-12V-Car-Charger-Jump-Starter-Portable-Power-Booster-Emergency-Battery/494797374