Dell-IMSourcing Primary Battery – Laptop Battery – Lithium-Ion – 55 Wh – For Notebook – Battery Rechargeable – 1 NEW BROWN BOX SEE WARRANTY NOTESAlways on the go? No more worries about running out of battery power! You can power your wireless keyboard with this 6-Cell Lithium-Ion Primary Battery from Dell. With a capacity of up to 55 WHr, the battery lets you work seamlessly when you are on the move for business trips or vacations. This battery provides uninterrupted reliable performance you need to get the most out of your system.