Hipower Laptop Battery For HP 8400/AB Laptop Notebook Computers Cell Count: 9 Cells Voltage Rating: 11.1V Capacity Rating: 6600mAh; 72Wh Type: This item is an extended capacity 9 cell battery. This battery is physically larger than batteries with fewer cells and may stick out from your computer when installed. Please compare the ratings to determine if this battery is different from your current battery. Dimensions: 8.05in X 2.81in X 0.85in (204mm X 71mm X 22mm)