In uk.d-i-y aussie bongo wrote:

"Ian Stirling" wrote in message
...
In uk.d-i-y aussie bongo wrote:

"Lobster" wrote in message
...
I'm thinking of buying an 12V - 240V for the car, to enable me to
charge/run devices such as a laptop / mobile phone(s) / AA batteries for
gameboys & camera etc etc while on the road (one at a time!); they seem
to
be as cheap as chips these days and this would enable me to use the
standard mains chargers for all the above devices rather than buying
separate low voltage kit to connect each of them up to the cigar
lighter.
snip

My laptop - admittedly a subnote - uses about 40W when charging, and
about 15W running normally.

This runs on a standard car battery for around a day, from an inverter.

but is that 40w &15w at 240v or the normally 18v that most laptops use??
this makes a big differance

About the wattage at teh plug.
The figures from 15V are 2A (sticker - I've never seen it past 1.5A) and
about 12W.