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macrumors newbie
Original poster
May 30, 2016
Okay so I received my 15" BTO MBP yesterday. Naturally I played about with it all day and drained the battery. When charging, I noticed a strange sensation when touching the laptop. There's a very slight static charge feeling on the metal case. If I touch it with both hands at the same time the sensation disappears, indicating it was most likely a simple grounding issue.

Plenty of searching later and it appears to have been common on Macbooks for a while because of the metal body, and the solution was to use the extension plug included with previous MBPs as they were grounded. Sadly these aren't included with the new models.

My question is... Is there anything available for the new Macbook Pros yet that do the same job? Or is the sensation something you quickly forget about?


macrumors G3
Nov 23, 2011
As Seadragon said, best to use the long extension cable from a previous gen. It's a very common complaint I've encountered.

The reason is because the small adapter cable isn't earthed whereas the longer lead is (well, something like that). So when running on the small adapter that plugs straight into the power block, the aluminium on your Mac tends to get a bit of charge through it.

EDIT: I noticed you mentioned the above in your post. Sorry!


macrumors newbie
Original poster
May 30, 2016
I was unaware the previous extension plugs were compatible. The description on the Apple website doesn't appear to be very up to date! Thanks for the help.


macrumors regular
Jan 22, 2016
Yes I'm looking too for another solution, I want 2 charging cable so I need to buy 2 extension cable + 1 usb c charging cable + 1 another block = 154 € ..........

I've find a very good alternative on amazon :
+ 1 cable => 35 € ...
They only promise 29W with USB-C. Thats half the power and charging speed of the 13" MBP charger. That might do if you have the non-touch bar model as it only uses about 15W at full load. The touch bar 13" uses about 30W so it would not charge nor drain. 15" uses about 85W its battery would drain if you ran it at full load. I'd wait a little so manufacturers can catch up with their power adapters.


macrumors 601
May 19, 2011
This happens on iPhone and iPad too. The aluminium casing becomes slightly live. Nothing to worry about though, I don't think. If it were a Samsung product though...
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