Dell-IMSourcing Battery : Primary 9-cell 87W/HR LI-ION For Selected Dell Systems – For Notebook – Battery Rechargeable – 6600 mAh – 87 Wh – 11.1 V DC NEW BROWN BOX SEE WARRANTY NOTESLI-Ion batteries are longer lived than conventional batteries and do not require replacement as often. The Dell™ 9-Cell LI-Ion Battery provides continuous, reliable power to your notebook. With a capacity of 87 WHr this battery lets you work seamlessly when you are on the move. This product has been tested and validated on Dell systems to ensure it will work with your computer. It is supported by Dell Technical Support when used with a Dell system.