When I was in high school, I had the best physics teacher in the universe. Patrick Gillespie was genuinely passionate about the subject and often visualized the lesson using contraptions he had built himself. One such DIY apparatus was an enormous capacitor – a plastic 55-gallon barrel layered with aluminum foil on the inside and outside. While crude, Pat’s cap could store enough charge to zap any student brave enough to touch the two plates. Ah, the memories!
So basically, that’s what a capacitor is – a device that can store and deliver electrical charge. This … – Source
Future smartphones may charge faster and last longer thanks to supercapacitor technology
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