As a leading manufacturer of portable computer power accessories, Battery Technology is dedicated to providing innovation, reliable & affordable battery technology to generate power & functionality for notebook computers, camcorders, portable peripherals & cellular phones. This product is designed for IBM Think Pad T40, R50. Features Device Type: Notebook Battery Power Type: Li Ion Power: 11.1V, 4500m Ah Compatibility: Think Pad T40, T41, T42, R50, R50E, R50P, R51, R52 (standard capacity) OEM P/N: 08K8214, 92P1101, 08K8192, 08K8193, 08K8195, 08K8196, 08K8197, 08K8198, 08K8199, 08K8201, 92P1011, 92P1013, 92P1060, 92P1061, 92P1071, 92P1075, 92P1076, 92P1077, 92P1087, 92P1089, 92P1091, 92P1102