DELL  Studio XPS 13, Studio XPS 1340, 312-0773, 312-0774, P866C, P878C, P891C, PP17S, R437C, T555C, T561C, W004C, Laptop battery For the DELL 312-0773, 312-0774, P866C, P878C, P891C, PP17S, R437C, T555C, T561C, W004C Replaces Laptop / Notebook batteries FITS devices DELL  Studio XPS 13, Studio XPS 1340 This battery is designed for the DELL with a capacity of 4400 , it is manufactured by our ISO 9001 certified supplier to a very high standard. Please note some of our extended batteries may slightly larger to accomodate the cells. As we supply a very large range of batteries we cannot always have stocks of the slower moving lines as batteries have a shelf life and we insist on quality control for our customers, which may mean slightly delayed shipment date, where this is necessary you will be advised by email. Battery Type: Lithium Ion Battery Voltage: 11.1V Battery Capacity: 4400 Colour: black