This is a Brand New Boxed 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 IBM Models: ThinkPad 390: 390, 390E, 390X ThinkPad i1700: i1700, i1720, i1720, Replaces IBM part #s: 02K6513, 02K6520, 02K6521, 02K6534, 02K6535, 02K6536, 02K6537, 02K6610, 02K6611, 02K6611, 02K390, B316. Product Specifications: Rating: 11.1V Capacity: 4400mAh Size: 6.10" x 3.50" x 1.20" Color: Black Technology: Lit-Ion Condition: Brand New In Stock: Yes