I was just having trouble getting my Edge to charge in the fast charging mode. It would charge, just wouldn't use the fast charging mode even though I was using the official charger and had the setting turned on.
I noticed something kind of interesting and possibly easy to miss... If the USB cable becomes partially pulled out of the charger, there seems to be a point where the phone will still charge, but it won't recognize the charger as being a fast charger (so it does not take advantage of it.)
My cable had started to pull out of the charger, which caused this to happen. Sure enough, when I made sure it was fully in the charger, it recognized it as a fast charger. I think the charger probably uses the center USB pins to communicate to the phone that it's a fast charger, and since those are a little shorter than the outer pins, having the USB not fully seated in the charger can allow this to happen.
Anyway, just something to watch for.
I noticed something kind of interesting and possibly easy to miss... If the USB cable becomes partially pulled out of the charger, there seems to be a point where the phone will still charge, but it won't recognize the charger as being a fast charger (so it does not take advantage of it.)
My cable had started to pull out of the charger, which caused this to happen. Sure enough, when I made sure it was fully in the charger, it recognized it as a fast charger. I think the charger probably uses the center USB pins to communicate to the phone that it's a fast charger, and since those are a little shorter than the outer pins, having the USB not fully seated in the charger can allow this to happen.
Anyway, just something to watch for.