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Charging laptop with non-original charger
How can I tell if an AC adapter is compatible with my laptop?

So the original laptop charger broke and I switched to a charger from a laptop that I no longer use. The specifications from each are:

Original Input:AC 100-240V 1.5A 50-60Hz Output: DC 19V 3.42A

Other Charger Input: AC 100-240V 1.5A 50-60Hz Output: 20V 3.25A

Yes, the polarity is the same.

Also, the wattage has a difference of .02 from what I understand. Is wattage ever important, and more specifically, a wattage difference of that size.

Feel free to ask me any other questions about the chargers and I'll answer them to the best of my ability.

marked as duplicate by MaQleod, soandos, Daniel Beck Oct 29 '12 at 7:13

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You're very close to the 5% tolerances power supplies are designed to. You may be asking the power supply for a little bit more power than it was designed to supply. Make sure it's not getting unusually hot.

  • It's not well within 5% - it's almost within 5%. The voltage is just over 5% more (5.26%). I don't know how much higher a voltage is typically safe, but a voltage too high (at some level) would blow components. (A voltage too low would be unlikely to cause to damage (it could get a low voltage from a dead battery and would have to tolerate it), but might not work, and a higher current should work (but see Selali Adobor's answer in superuser.com/questions/393076/…)). The current is almost 5% lower, but that's unlikely to be a problem. – John B. Lambe Sep 20 '18 at 18:07

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