Hipower 8 Cell Laptop Battery For HP ProBook 4730S, PR08, 633807-001, 633734-141, 633734-151, 633734-421, HSTNN-IB2S, HSTNN-LB2S, HSTNN-I98C-7 Laptop Notebook Computers Cell Count: 8 Cells Volts: 14.4V Capacity Rating: 4400mAh; 65Wh