User reports metallic taste in mouth when using laptop

I’ve got an Intel Pro that would <i>very slightly</i> shock me when plugged in. It’d feel like the edge of the case had jabbed me a little, when it did it. I could imagine this being an electrical effect. User claims this has been while unplugged, though, so must be a different issue even if it is electrical.<p>Or maybe their laptop got exposed to some nasty levels of radiation.

This is gold.<p>&gt; I mean. My scientific mind would like to try ruling out variables. Stand over it without touching it for a while. Wear a gas mask. Stop chewing on it. See what works

I take the Amtrak pacific surfliner a lot and I&#x27;ve noticed that mac laptops will lightly shock me when they&#x27;re plugged in. I think I&#x27;ve experienced this with 3 different computers over the past 6 years. Might be a useful data point, since I believe the train is an isolated power circuit independent from the power grid (the electricity is generated by the locomotive).

My M2 pro tries to ground itself through my arm on occasion when using it while it is charging so I wouldn’t put it passed apple

Every Macbook or Macbook Pro I&#x27;ve had since ~2012 has had this issue. It doesn&#x27;t present primarily as a &quot;metallic taste&quot;, though. It&#x27;s more of a barely perceptible tingle when my fingers touch the metal casing. It&#x27;s especially noticeable when it&#x27;s cold and when the ambient air is dry.<p>It only happens when I&#x27;m using the power brick with the two-prong &quot;duckbill&quot; plug; it doesn&#x27;t happen with the old three-prong extension cable attached. From that, I assume it&#x27;s a grounding issue.

<p><pre><code> If you feel liquid running down your neck, relax, lie on your back, and apply immediate pressure to your temples. You are simply experiencing a rare reaction in which the Material Emancipation Grill may have emancipated the ear tubes inside your head. -- Portal</code></pre>

This could be &quot;common mode noise&quot; if the PSU is not grounded. There could be 100V on the chassis of the laptop. <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=wa1oLg7srOw" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=wa1oLg7srOw</a>

&gt; <i>When Apple writes that their new M3 MBA is the best laptop ever for AI, they should specify that AI stands for Artifical Intelligence, not Aluminium Ingestion, to rule out happenings like this.</i><p>Excellent.

Yes, I’ve experienced this with a MBP and Dell XPS (both Intel). It seemed worse when under load. I tried all sorts - cleaned the fans, re-applied thermal paste, Isopropyl scrubbed the case, replaced battery etc. The only thing that made a big difference was turning off WiFi on the laptop and connecting via Ethernet instead. Presumably something in the WiFi chip is off-gassing, or a dental filling is reacting to EMF in some way.

I&#x27;m just glad the person took it seriously and returned the laptop to be done with it.

There&#x27;s always static electricity on MacBooks, especially in Europe!

I guess Apple switched to those new plutonium batteries:<p><a href="https:&#x2F;&#x2F;www.independent.co.uk&#x2F;tech&#x2F;nuclear-battery-betavolt-atomic-china-b2476979.html" rel="nofollow">https:&#x2F;&#x2F;www.independent.co.uk&#x2F;tech&#x2F;nuclear-battery-betavolt-...</a>

...but only when sending an email more than 500 miles away?