I don't think those are related at all. One, the tingling is your body being used as ground. It's well documented and as you noticed, only happens when 2 things

I don't think those are related at all. One, the tingling is your body being used as ground. It's well documented and as you noticed, only happens when 2 things are true: * The battery is charging; and * The charger is ungrounded If you read through the thread, OP says: > only have tried battery so far. https://forums.macrumors.com/threads/weird-taste-in-mouth-when-using-midnight-13-m3-air.2422177/?post=33017781#post-33017781 https://forums.macrumors.com/threads/weird-taste-in-mouth-wh...