Compatible with Portables as :

Dell XPS 12 Series 
Dell XPS 12-L221x
Dell XPS12D-1708
Dell XPS 12 Ultrabook
Dell XPS 12-9Q23
Dell XPS 12-9Q33

Dell XPS 13 Series
Dell XPS 13 Ultrabook
Dell XPS 13-1500sLV
Dell XPS 13-2501sLV
Dell XPS 13-40002sLV
Dell XPS 13-6928sLV
Dell XPS 13-7000sLV
Dell XPS 13-9001sLV
Dell XPS 13-9333 P29G001
Dell XPS 13-L321X
Dell XPS 13-L322X
Dell XPS 13-0015SLV
Dell XPS 13-4040SLV
Dell XPS 13-925sLV

Dell XPS 13D Series 
Dell XPS 13D-138
Dell XPS 13D-148
Dell XPS 13D-2508
Dell XPS 13D-2608
Dell XPS 13D-2701
Dell XPS 13D-2708
Dell XPS 13D Series 
Dell XPS 13D-128
Dell XPS 13D-2501

Dell XPS 13R Series 
Dell XPS 13R2 Series 
Dell XPS 13R2-1050sLV
Dell XPS 13R2-1250sLV

Dell XPS 13Z Series