"Dave Plowman (News)" wrote in message
...
In article ,
aussie bongo wrote:
i dont know about power usage on a laptop, but, i do know that 100w
drawn from an inverter at 240v, will give you less than 1/2hours usage.

A reasonable sized car battery will be around 70 amp/hour at the 20 amp
rate.

? where did 20A come from?


20 amps at 12 volts is 120 watts,

Not when I went to skool


so it would be reasonable to
expect something like 3 hours use at 100 watts 240 volts.

WTF?


But a laptop will be nothing like 100 watts otherwise it wouldn't last for
minutes on its internal batteries.

I'll give that a tick



--
*Who is this General Failure chap anyway - and why is he reading my HD? *

Dave Plowman London SW
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