My A1200 PSU was filled with, what looked like resin... that made it really heavy... my A500 PSU was just a transformer in a box..
My 25W A1200 PSU is stupidly light - hardly seems like there's anything in there. But I've borrowed another A1200 with one looking identical, but weighing about as much as the heavy A500 brick. Anyone know the difference between the two A1200 ones?