Li-ion 10.8V 8800mAh PA3399U-1BAS PA3399U-1BRS PA3399U-2BAS PA3399U-2BRS Replace Laptop battery for Toshiba M40 50 Dynabook AX/55A Equium A100-027 Li-ion 10.8V 8800mAh 12 cell Black One year warranty , 30 Days Money back warranty Made from the highest quality cells Features 100% Brand New Battery Replacement Certified by CE