Laptop power - 12 volt adapter

Submitted: Friday, Jan 28, 2005 at 02:51
ThreadID: 19849 Views:3874 Replies:8 FollowUps:3
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One for you electronic gurus,

Just bought a Sony Vaio B series laptop computer.

Also bought a Targus 12 volt adapter to be able to run it in the 4by. $160.

Plugged it all up to 12 volt with the right tip and all and it won't go. Computer does not recognise it as an AC power source. Tried it in a Toshiba laptop and it worked just fine.

The output of the adapter says 16 to 24 volts and up to 70 watts. The input to the Sony laptop says 16 volts and 4 amps but does not specify a wattage.

I seem to remember that you get watts by multiplying the volts by the amps or something similar. If this is correct then the computer wants 64 watts which is nearing the capacity of this adapter. Maybe the adapter is not big enough to run the computer. Am I right in thinking this???

Annoying when the salesman says "This is the product you need Sir" and you get it home to find it won't go.

If anyone can recommend any alternative products for powering the laptop in the 4by I am all ears. How much less efficient is it to run a small (say 150w) PSW inverter instead? Is that all the power supply is anyway?

Cheers
Muddy
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