How can I make an electrical coal?

[nadiro]

Hi my friends

I want to make an electrical coal which has the ability of being charged for some hours or use the power directly.
What is it made of? and how can I build it?
What is your suggestions?

Best regards

 

[BradtheRad]

A rechargeable battery is the first thing that comes to mind.

Or are you thinking of a capacitor, or supercapacitor?

A capacitor will not necessarily keep a charge for hours.

Supercapacitors function in a manner somewhere between batteries and capacitors. Supercapacitors are related to coal in the sense that you can make them from carbon-type materials.

This link has a discussion:

https://www.overunity.com/103/cheap-homemade-capacitors/#.UogBsd3YkU8

 

[godfreyl]

Maybe he's talking about some sort of heater thing - like an "electric fire"?

 

[nadiro]

Yes I mean "electric fire".
In fact I want to know that what is an electrical coal, which use for hubble bubble, made of?
I am searching for it's structure.

Could you please help me

Thanks in advance