On Mon, 28 Nov 2005 11:34:26 +0000, The Natural Philosopher
wrote:

On Fri, 25 Nov 2005 23:27:36 GMT, dennis@home wrote:

"Doctor Drivel" wrote in message
reenews.net...


Have you ever weighed a full fuel tank -£50s worth?. Per weight modern
state-of-the-art batteries pack a hell of a lot of energy. These
batteries
are not available in volume yet.


Mines about 45kg but it only holds £40 worth.
How much charge can you get in 45kg of battery?

well lemme see..the best battery I have as 22 watt hours roughly and
weighs...rushing to scales...150g..and costs about 50 quid so thats 6.6Kwh.
for 45kg.

I reckon 30KWh is about what you need for a 300 mile range lighweight
electric 'shopping trolley' with a 300 mile range. About £50,000 quid. :-)

Say 250kg. About the same as a conventional car engine and transmission and
cooling system.

Batteries on their own will not make a car move, the motor and control
system has to be factored in. In any case 250kg is considerably above
the weight of even some 15 year old engine gearbox combinations
(around the 1.6 litre mark)




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