Replacement Dell XPS Laptop Battery - Lithium Ion Polymer, 7.4V, 6Ah, 44Wh. Compatible with Dell XPS 12, XPS 13 Ultrabook models, including XPS12D-1708, XPS12-L221x, and more. Compact design with dimensions 287mm x 113.2mm x 6mm and weight of 267g for optimal performance and long-lasting power.