8. "RE: Do Androids Dream of Electric Cars?"
In response to message #0
Also, chemical batteries are terribly inefficient. At best, roughly 75-80% of the energy used for charging is lost as waste heat. Closer to 90% waste is typical.
Supercpacitors (supercaps) are significantly more efficient than chemical batteries but they have their own spate of problems like leaking and sharp drop-off as they discharge.
-- Rat That and five bucks will get you a small coffee at Starbucks