help me please (tow small question ) topic

hey guys i have tow questions and i really hope if some one can help me :confused:
1. we all know about the s pen feature that allow us to select text by pressing the s pen bottom then an option window comes out but we cant use it every where ..... so is there any way to make it work every where or at least in more apps like moon+ reader
2. we all knew about charging cover but in note 4 there's (fast charge) so does these cover support this or not and will it harm the battery or not