I have an old netbook that requires 19V and 2A charger. I found one charger of 19.5V and 4.62A in the garage. I connected it and it is working. Is it ok to use it like that or will it cause damage in the long term?
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@user1686 no. My current is too high– Kyoko SasagavaCommented Jun 24, 2021 at 10:57
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2That's the "Laptops draw current from the charger as needed. Chargers don't push current inside laptops" part in the aforementioned answer.– grawity_u1686Commented Jun 24, 2021 at 11:00
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1See also Can I safely charge my laptop with a non-standard, third-party charger? which I've now fixed the info on, and Laptop power adapter output compatibility.– TetsujinCommented Jun 24, 2021 at 11:07
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1 Answer
Doesn't matter, it should work properly, there is also wire resistance and other stuff which will make the power balanced for laptop, also more amp doesn't mean it will force current into the laptop. It simply means the max current this charger can provide under load. The laptop will only draw Amps it requires to keep it operational. Rest assured it's safe to use.
Hope my answer helped you.
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@KyokoSasagava As long as the voltage is not more than 10% off and the power-supply can supply the same amount (or more) of current (Amps) this is in general fine. Do take care of the polarity of the plug. The + and - HAVE TO BE on the same side of the plug as on the original power-supply.– TonnyCommented Jun 24, 2021 at 11:10
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1@KyokoSasagava if this answered your question, please mark this answer as "correct", rather than thanking in the comments. Like that, everyone will know this has resolved your problem. (You'll even get some points for doing that!). As you're new to this community, you also might want to take the tour– 1NNCommented Jun 24, 2021 at 11:20
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@Tonny it is working fine. So i think polarity is correct right? I don't know how to check polarity though Commented Jun 24, 2021 at 11:31
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2@KyokoSasagava Polarity should be listed on the power-supply and (often) on the device right next to the socket for the power plug. For the typical barrel-plug usually a (stylized) picture of the powerplug consisting of a dot (or very small circle) with a larger circle around it and 2 wires sticking out (on on each side) connecting to the central pin and the surrounding circle. The + and - markings are placed on the "wires". Sometimes only the + marking is shown. Central pin being + and outside being - is the most common variant. If it works now you're fine.– TonnyCommented Jun 24, 2021 at 11:51