BULL-TECH Li-ion 9-cell 11.1V 85Wh New Laptop Battery for Dell Studio 17, Studio 1745, Studio 1747, Studio 1749, Replace for U150P U164P N855P N856P M905P Notebook PC Battery Type: 9 Cell Lithium-Ion;Color: Black Voltage: 11.1V ,Capacity: 85WH Fit Laptop Models: Dell Studio 17 1745 1747 1749 100% New from Manufacturer. Up to 500 recharge cycles over the life of the battery Warranty: 12 Months Warranty,30 days money return guarantee !