I'm using a generic charger, and while you do have to position it correctly, I find it fairly forgiving. Basically as long as I vaguely line it up with the pad

I'm using a generic charger, and while you do have to position it correctly, I find it fairly forgiving. Basically as long as I vaguely line it up with the pad surface it works fine, and there's an LED that turns green to let me know it's correct. I didn't know the official Nexus 5 charger used magnets though. I passed on it because IIRC it was a weird cylinder stand that looked less stable than the generic flat pad I bought. (That and it was a good bit more expensive.) EDIT: I just played around with mine now, and the margin for error is at least a couple of cm. I think my sense of neatness objects to the offset before the charger does.