Help needed with a power adapter, how do Amps work again?

[Fear]

If there's anyone with a bit of knowledge about power adapters....please gimme some help.

I've got a laptop with a power adapter (original) that has:
INPUT: 100-240 V ~ 2.0A(2,0A) 50-60Hz
OUTPUT: 19 V - 6.3A(6,3A)

NOW........I've just bought a spare power supply online to use on my work place, it supposedly is one that would work for my laptop....but that one is:

INPUT: 100-240 V ~ 2.5A 50-60Hz
OUTPUT: 18-24V (19V) - 6.0A (120W MAX.)

Can someone shine some light on this for me? - is it ok to use?, even though the original has an output of 6.3A and the new one has 6.0A

Thanks!

[BlueJazz]

1. Naw...Not enough to matter

Your old one was capable of putting out 6.3 amps ...New one 6.0 amps.
Your laptop doesn't draw nearly that many amps.

Keep in mind that watt ratings (ampXVoltage) are approximate anyway.

The old one could safely put out 6.5 amps and the new one 6.6 amps.

Don't worry about it. :)

[demosincebirth]

2. Yup.

[lfairban]

3. Amps is not the problem.

The new one produces 5% less current than the old one. That is not great but it should not be a problem.

The big concern is whether it is AC or DC, and if it is DC, is the polarity correct.

All circuit boards run on DC, but there is often a rectifier inside the device that converts the AC to DC. If not, then the device will require a DC power supply, one that has the rectifier in the power supply. If it is a DC power supply, you must have the right polarity, which means that positive goes to positive and negative to negative. There is often a marking on the device near the port and/or the power supply.

There are other issues like how steady the current is, but if you got it from the company or a reputable source, you should be OK.

I can give you a more technical description, but I think you should be alright.

Another thing, I doubt it is going to work with any voltage from 100 to 240. There is probably a switch so you can use it with American 100 to 120 volt, or European 200 to 240 volt. Be sure to set it correctly. The only time we use 220 volt in the US is with dryers or other industrial applications that require a lot of power.

[Fear]

6. Thank you all very much!

I'm feeling a lot better again :D

[TreasonousBastard]

4. While the differences are well within tolerances...

and shouldn't be any big deal, it's interesting to note that the new power supply takes more input amps to give less output amps.

That's also within normal tolerances for the vague way these things are measured, but it hints that this slightly less efficient PS might be POS.

[Tom Yossarian Joad]

5. Wattage divided by voltage...

Amps