I am absolutely not experienced when it comes to electrical stuff at all which is why I hope you can help me out on this one because I am a bit worried right now.

I own a bunch of Apple devices and after making the switch to a new 2017 MacBook Pro I noticed a weird, vibrating feel when striking over the aluminum. I instantly thought that it has to be related to the device being charged right now and indeed: Depending on whether it's charging or not and depending on the shoes I am wearing I can feel this weird, vibrating, tingly feeling.

So, to underline the fact that I have absolutely no clue about any of that I hope that anyone in here feels like giving me a hand and explain to me what I am experiencing here. I am indeed worried because apparently that applies to all of my current Apple devices - The same happens when I use my non original charger (with 24W) on my iPad.

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    \$\begingroup\$ This is a common problem with cheapo chargers that aren't earthed. \$\endgroup\$ – Makoto Apr 16 '18 at 8:16
  • \$\begingroup\$ Also electronics.stackexchange.com/questions/331868/… \$\endgroup\$ – pipe Apr 16 '18 at 8:18
  • \$\begingroup\$ Thanks for your quick replies, I'll get my Mac charger changed then :) \$\endgroup\$ – youngStupidQuestionGod Apr 16 '18 at 9:02
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    \$\begingroup\$ I can't see that this is a duplicate. I haven't seen the VIBRATION aspect mentioned before, nor an explanation of it. (though the electrical source of the current is a common topic) \$\endgroup\$ – Henry Crun Apr 16 '18 at 11:18
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    \$\begingroup\$ I think the "sensation" is not vibration, but the 120 volts (or lower voltages, depending on your body resistance) forcing a small current thru your fingers. \$\endgroup\$ – analogsystemsrf Apr 16 '18 at 16:22

This effect has a name. Electrovibration.
And it's due to the charger not being grounded. Leaking a tiny amount of AC current trough capacitive effects in the transformer and Y-class capacitors.
As by design.

This is a recurring question here, see the topics in the question comments.

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  • \$\begingroup\$ Thanks for your reply. Considering that it happens with my official Mac charger as well as my cheap iPhone charger, I am gonna let Apple exchange it. \$\endgroup\$ – youngStupidQuestionGod Apr 16 '18 at 9:01
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    \$\begingroup\$ Since it's a recurring question, you should have closed it, not added yet another answer. \$\endgroup\$ – pipe Apr 16 '18 at 9:07
  • \$\begingroup\$ @pipe there are many answers, but none of them are very clear and simple to understand. \$\endgroup\$ – Jeroen3 Apr 16 '18 at 9:20
  • \$\begingroup\$ @bqcqON replacing the charger will not remove this effect. \$\endgroup\$ – Jeroen3 Apr 16 '18 at 9:21
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    \$\begingroup\$ So you add your answer to the already present questions. \$\endgroup\$ – Vladimir Cravero Apr 16 '18 at 9:21

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