OT: Power Supply question

[John Summerfield]

Claude Jones wrote:
> I know this is off topic, but I appeal to the collective grace, and hope this 
> list-fount of knowledge can answer or provide me with leads:
> 
> I just bought a new laptop which arrived yesterday. My previous laptop is an 
> HP ZX5000 which had a P4 3GHz processor, and  took an enormous 120 W power 
> supply rated to deliver 18.5 V and 6.5  A.
> 
> My new laptop is an Asus 'Gaming laptop' G2S-B2 (I'm not a gamer but I wanted 
> this for its power which I use for video editing); the power supply states 
> that it delivers 19 V and 6.32 A. It doesn't have a wattage output imprinted, 
> but in the spec sheet for my new machine, it states that it requires 90 W
> 
> I noticed the closeness in specs, and tried one of the HP laptop power 
> supplies on the new machine. It operates it just fine. My question is, am I 
> liable to cause any issues by using a 18.5 V power supply in place of the 19 
> V one. This of concern to me, because I keep three power supplies on hand for 
> my machine, two of which are permanently installed at my place of work and in 
> my residence, and the third which is for on-the-road use. It would be nice if 
> I could get away with using my spare HP units and not have to buy two more 
> power supplies for my new machine.

It's long since I enquired into such, but +-10% should be fine.  The 
biggest risk was polarity, I'm not sure that's well standardised.



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Cheers
John

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