I have the same problem, screws are too tight, look like samsung had put in threadlock non-removable on this model.

[chuong trung]

Screws are too tight for samsung series 9 NP400X4C, unable to unscrew them.
What are the exact size of the screw? Any long and better grip screw driver recommend?

 

[1shado1]

The same problem as who? What model?

 

[chuong trung]

samsung series 9 NP900X4C battery screws are just too tight.