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Resolved Question

laptop power supplies interchangeable???

by Mar 28, 2015 2:48PM PDT

So.is it safe to use 2 different power cords for laptops which have same volt but different amps????

19v/3.24a and 19v/1.75

I don't want to use the higher amp supply and fry my new laptop.

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sonyasgang has chosen the best answer to their question. View answer
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Re: PSU
by Forum moderator Mar 28, 2015 7:25PM PDT

Power supplies give the current (A) needed in the specified voltage (V), but no more current than they are ranked for. So you can substitute a higher A for a lower A, but not the other way around since they give less power than the device needs.

Kees

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Answer
Depends on what Kees wrote plus
by Forum moderator Mar 29, 2015 2:32AM PDT

Some laptops have a third wire to lock out incompatible supplies. You can google Laptop Power Supply Third Wire to catch up on why this was done.
Bob

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