Not normal. Max should be 2 and a half hours for wall charger. If you charge via pc/laptop then 4 hours is normal.. and the charging time when the phone is off or on not much difference, 15 mins or so only..

My cable also got 4 pins bro.. I also dont know actually, because some of us here got 4 and 5 pins. Then got one person went to the SC to exchange, at the SC the staff show him the cable is  4 pins also, so end up didn't change anything.. Lol.

If you have no problems charging your phone and transferring files from pc to phone then I guess no need change the cable.. For me, i've never had a problem with the cable.. Charging times are normal, and no problem with file transfers..

Hmm. Using the wall charger? Or are you charging with pc/laptop? If you use pc/laptop then 4 hours is normal, but if wall charger, go to sc change. Not normal.. Normal charging time for wall charger is around 2 and a half hours only..