This is a Brand New IBM Boxed Original Product.Stay unplugged longer with the help of a spare ThinkPad system battery. Help increase your productivity due to longer system run times. Get the power your need whenever and wherever you need it. Compatible ThinkPad Models: 770, 770D, 770E, 770ED, 770U, 770X, 770Z series. Replaces IBM part #s: 02K6488, 02K6508, 02K7000, 02K7003, 02K7017, 02K7019, 12J0433, 83H6193, 83H6738. Product Specifications: Rating: 10.8V Capacity: 5400mAh Size: 5.90" x 3.60" x 0.80" Color: Black Technology: Lit-Ion Condition: Brand New In Stock: Yes