Laptop battery Toshiba PA3591U 4 Cells 14.4V 2200mAh/32wh, compatible partnumbers: TOSHIBA: PA3591U-1BAS, PA3591U-1BRS, fit models: Satellite L401 Satellite L40 Series Satellite Pro L40 Series High Quality Laptop Battery 4 Cells, Li-ion, 14.4V 2200mAh/32wh - Black 1 Year warranty