Since 1965 Lenmar has been building award winning, high quality power related products. Lenmar personally manages the excellence of our products through every aspect from design to production. Fits: Dell Studio 15, 1535, 1537 Replaces: Dell 312-0701, KM958, WU946, WU960 Specifications: •Voltage: 11.1V •Capacity: 4400mAh •Chemistry: Lithium Ion •Warranty: 1 Year Warranty