There are roughly 125,000 BTU in a gallon of gasoline and about 20% is turned into mechanical energy, so about 25,000 BTU of mechanical energy per gallon, a gallon of gas is about 3785 cc, so about 6.6 BTU per cc of gasoline is used for mechanical energy.
I dont know how much energy is stored in a battery, or what the efficiency of a battery is but I would assume it is much higher than 20%.
- what is the amount of energy per cc or cubic inch that a good battery holds?
- is there a standard rate of doubling of battery power per cc? Moores law shows that the number of transistors per chip doubles every 18-24 months and Ray Kurzweil has shown alot of information technology doubles every 1-3 years. So is there a rate of battery doubling? I have read that batteries have lagged far behind electronic growth and as a result we have cellphones & laptops that don’t last more than 3 hours if you actually use them so I’d guess it is close to 6-8 years per doubling.