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...