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Originally Posted by Guest
It is called physical chemistry, where physics and chemistry over lap. What type battery are you talking about. A flashlight battery runs on a one way chemical reaction. When everything reacts the battery is dead. With a rechargeable battery it is a reversible chemical reaction. I could believe it takes 32 times more energy to make it than it can store and this energy you would never get back. You won't get any energy out until you charge it and put energy into it. You get out slightly less than you put in but you can do it over and over.
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And EVERY time you recharge it...you LOSE energy. You "soent" 32 units of energy to build it...energy you'll never get back...PLUS each time you recharge it, you lose even more...you go even more negative.
Money and energy are two different things...you need to keep the "units" correct. There is NO coloration between energy and money. You can pay $60 for a barrel of oil that has 8 man years of "work", of energy in it. OR, you can pay 32X that...$1,920 for a lithium battery that REQUIRES more than $60 in charging to release the energy of a barrel of oil.
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Originally Posted by Guest
"A battery must be manufactured and then it must be charged. As I said earlier...it takes 32 times more energy to MAKE a battery then you'll get out of it. It takes 32 barrels worth of energy to get out 1 barrel of energy from the battery."
Is the the rechargeable battery different. If it takes so much energy to make it why is practical?
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It's NOT "practical" in an energy efficiency point of view. It's PORTABLE. It's self contained. You plug it in and everything works. It takes 32X the ENERGY in a barrel of oil to make a lithium battery...a $1,920 dollar lithium battery. The ONLY reason we HAVE batteries like we do is that fossil fuels are unbelievably cheap. $60 for 8 man years of energy? It's a steal. BTW...that is what ended slavery. To get a barrel worth of energy from a battery you'd need...20% more than a barrel because of inefficiencies.
Without the luxury of "unlimited cheap fossil fuel power"...we wouldn't have batteries...we couldn't afford them.