My genuine iphone charger cost me £20, and fell apart within months, (split casing, frayed wires) but it still works well as I taped it up.
I bought a cheap iphone charger, (not a copy, doesn't pretend to be Apple), for only £2 from Ebay. It hasn't exploded 'yet', but it takes a lot longer to charge the phone up.
It came from HK, and the shipping charge was NIL! Incredible.
Dave R, you had an iphone charger explode did you not, I recall? Was it a genuine Apple one?