Comment on New breakthrough may let us charge smartphones in 60 seconds
cygnus@lemmy.ca 4 weeks agoThanks for this - I was doing some reading in the meantime which confirms what you’re saying about power capacity.
en.wikipedia.org/wiki/Capacitor_electric_vehicle
As of 2010, the best ultracapacitors can only store about 5% of the energy that lithium-ion rechargeable batteries can, limiting them to a couple of miles per charge.
Thevenin@beehaw.org 4 weeks ago
Yeah, this matches my experience.
A supercapacitor buffer will cost around twice as much and deliver around 1/10th the watt-hours of a similarly-sized lead acid battery. And lead acid isn’t exactly great to begin with.
Capacitors are useful, but only in applications where the total amount of energy stored is more-or-less unimportant.