42T4891 – IBM Lenovo 4400mAh 49Whr 6-Cell Battery for ThinkPad X100e/X120e Brand : IBM Weight : 1 Piece Rechargeable : Yes Battery Chemistry : Lithium Ion (Li-Ion) Capacity of Battery : 4400 mAh Recharge Life Cycle : Yes Number of Cell : 6-Cell Compatibility : ThinkPad X100e/X120e Compliance Standards : RoHS,CE Eco Friendly : Yes