Dave Plowman wrote:

In article ,
RichardS noaccess@invalid wrote:

Given the improvement in battery performance in the last 10 years, it
must surely be possible to buy something approximating to a dust-buster
on steroids. I haven't seen one though.


Improving on something that starts out as very poor isn't that difficult.
When battery cars become practical, the rechargeable problem will have
been solved.



Yeah, well. The best of todays batteries are still a hundred times
heaviuer per unit energy thgan petrol...even if the motors are more
efficient and cheaper.