My keyboard malfunctions when charging

When I plug in the charger at a friends house, the keyboard responds with lots of extra letters and actions for any 1 button pressed. This doesn't happen with my Ipad charger, only his. Anyone had this issue? Might this affect the Ipad negatively? My friend's USB is indeed Apple, but the wall connector is Bestek. Thanks anyone that has info on this, as I could not seem to find anything about it online. Perhaps I'm using the wrong search query.

I have the same issue with my new ipad3 and I don't know what's wrong with it. I tried using an iphone wall charger and the keyboard issue was gone. I am using the 10W ipad charger (the one included in the ipad box) and the keyboard malfunctions when you try to type while charging. Please help too

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