Andrew Gabriel wrote:
In article ,
geoff writes:
or not ...

someone talking sense at last

http://www.withouthotair.com/

I haven't read it,

If you got put off by the apparent huge PDF tome you had to download (as
I was initially!) actually, the phone charger article is at another
(very easy-to-read) link - worth a shufti!:

http://www.inference.phy.cam.ac.uk/sustainable/charger/

David