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Random question.. Does your charger emit a hissing noise?
Don't know if this is normal since I've never had a charger emit sounds before, but my N7 charger makes a weird hissing noise. It's not incredibly loud, but it is definitely audible from a few feet away. If I unplug it from the wall socket, it persists for ~5 more seconds, gradually elevating in frequency until it stops altogether. Pretty sure it's been like this ever since I got it, but I didn't really notice until a month ago.
I have it plugged in to the wall socket most of the time, out of convenience--I know I should be more energy efficient, but my laptop charger is always plugged in so I didn't think it would be an issue. Should I change my charging habits, contact ASUS, or not worry about the noise?