This is a 4 Cell ThinkPad X60/X61 Tablet Li-Ion Battery. This battery is designed for use with the ThinkPad X60/X61 Tablet Series Only. Provides approximately Three-hour average battery life. Replaces IBM part #s 40Y8314, 42T5204, 42T5205, 42T5206, 42T5207, 93P5031, 42T5259. Compatible ThinkPad Models: ThinkPad : X60 Tablet, X61 Tablet Product Specifications: Rating 14.4V Capacity: 2.0 Ah Size: 3.60" x 0.92" x 10.74" Time live: Three-hour average battery life Cells: 4Cell Color: Black Technology: Lit-Ion Condition: Brand New