DELL BTP-57A1, 1CPC159883-01, Laptop battery For the DELL Replaces Laptop / Notebook batteries BTP-57A1, 1CPC159883-01, CS-AC1400NB FITS devices Smartstep 200n, Smartstep 250n 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: 14.8V Battery Capacity: 4400 Colour: Black Dimensions: 145.00x122.30x20.00