Opening a laptop charger or adptor is such a mess so i am describing how to open the case without damaging it.This method is very easy and convenient and anybody doesn’t want to open it by a bang of hammer.
So u just need a piece of cotton and some amount of gasoline(Petrol).
So just pour some gasoline on all the joints of charger and repeat for 1 min then just try to open it by your hands and bang!! it will open very easily. For further information u can watch this Video.