(just an example of other manufacturer) Same Lenovo laptop model comes with grounded Schuko plug in Europe and ungrounded 2-pin in US (and probably Japan). I ow

(just an example of other manufacturer) Same Lenovo laptop model comes with grounded Schuko plug in Europe and ungrounded 2-pin in US (and probably Japan). I owned both verisons. Both make noise to audio output and mess up cursor while charging (not when 100%). Plug difference is probably a certification issue.