Battery Type: Li-polymer
Voltage: 11.1V
Capacity: 2000mAh/22wh
Color: Black
Dimension: 138.3x128.1x10.7 mm
Product Type: Replacement Battery (Brand New)
Condition: New, 1 year warranty!
Weight: 179 g

Compatible Part Numbers:

57Y4536

Fit Laptop Computer Models:

Lenovo
ThinkPad T400, T400s
ThinkPad T500 Series
ThinkPad T410s Series
ThinkPad R400
ThinkPad R500 Series
ThinkPad W500 Series
ThinkPad T60 Series
ThinkPad Z61,Z60 Series
ThinkPad R61,R60 Series
ThinkPad X6 UltraBase and ThinkPad X6 Tablet Ultrabase.

1.Delivers the power of a second battery, but you do not have to carry around a spare loose battery.

2.Offers similar specifications to the standard system battery - Use it in the Ultrabay of the ThinkPad system along with your standard system battery to get up to twice the unplugged usage time as you could get with the standard system battery alone. Since the battery works in the Ultrabay you do NOT have to suspend the system to swap out the system battery to use the ThinkPad for an extended period of time.