HIGH PERFORMANCE INSPIRONBATTERY LI-ION MAIN BATTERY Battery life and recharge times will vary based on many factors including screen brightness, applications, features, battery conditioning, power management and other customer preferences DESCRIPTION This Hi-Capacity Lithium-Ion batteryis longer lived than conventional battery and do not require replacement as often. The 9-Cell Smart Lithium-Ion Primary Battery has internal circuit board with chips that allow it to communicate with the notebook to monitor battery performance, output voltage and temperature.This product has been tested and validated on Dell systems and is compatible with Dell Notebook. This is 7200mah with 9 cell higher and faster then standard battery.