Electrical Power for Laptops

Jan van gastel wrote:

Yes, I meant 'my laptop is 0.37 ampere AC, at 220 Volts'. And it's a worse
case scenario.

That's about 80-watts but the efficiency of the laptop's power supply
(transformer) is less than 100%, so the laptop would actually use
considerably less power if you could bypass the 220-V AC power input and
run it directly on DC with a high capacity external battery. Does it
have a DC power input jack?


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That's about 80-watts but the efficiency of the laptop's power supply
(transformer) is less than 100%, so the laptop would actually use
considerably less power if you could bypass the 220-V AC power input and run
it directly on DC with a high capacity external battery.

A point of reference: I have a 75 watt inverter that seems to have no problem
running my Laptop...

jon