............ A battery is just a very big capacitor.
......
BTW, capacitors are not the heart of electronics: semiconductors are.
Yeh, sure they are try charging - discharge a batterie multitude times per second and then tell me what happend to the "bigger" capacitor. lol
Alright one of or major part.
Yeah, I'm not gonna waste my time (nor help you derail this thread any further) by giving you an electronics class. If you want to learn, go to school.