Description: Capacity: 3600 mAh Voltage: 11.1V (10.8V) Number of cells: 6 Cells technology: Li-Polymer Warranty: 12 months Cells manufacturer: Green Cell Colour: Black Overdischarge protection: Yes Overcharge protection: Yes The possibility of return: Up to 30 days Product code: LE78 Manufacturer: Green Cell Compatibility list: Compatible with following battery models : 42T4844 42T4845 Compatible with following devices : Lenovo ThinkPad T420s T420si