Our brand new 40Wh / 65wh (11.1v / 14.8V, 4 cells / 6 cell) replacement Dell XCMRD batteries are made with high quality cells ( SANYO, BAK, SAMSUNG etc.), lasting as long as the original battery did. All of our Li-ion replacement batteries for Dell XCMRD have been tested and proven to match and/or exceed original battery performance and 100% compatible with Original Manufacturer Specifications. Every piece of battery for Dell XCMRD laptop has been tested on Dell systems to ensure the safety for your Dell laptop.