Replacement BTI battery for TOSHIBA E45T SERIES E45T-A4100 E45T-A4200 E45T-A4300 E45T-AST2N01 E45T-AST2N02 E55 SERIES E55-A5114 E55T SERIES E55T-A5320 E55T-AST2N01 U940 11.4V 4160mAh Li-Ion 50 Whr 3 Cell