Product Code: LB84
Lithium Ion (Li-Ion) Voltage 10.8V (& 11.1v)Nominal Capacity 4000mAh Diameter/Width 153mm Height 20.5mm Length/Breadth/Depth 76.4mm Weight 306g Thinkpad R30 SeriesThinkpad R31 Series02K6821, 02K6822, 02K6824, 02K6829, 02K6830, 02K6832 This battery is a fully compatible alternatve to the original branded product