Compatible Brand:Acer; Compatible Laptop Models:ACER:Aspire 3820,Aspire 4553,Aspire 4553G,Aspire 4625,Aspire 4625G,Aspire 4745, Aspire 4820,Aspire 5820,Aspire 7250,Aspire 7739 series; Compatible Part Numbers:ACER:BT.00603.110,AS01B41,AS10B31,AS10B3E,AS10B41,AS10B51,AS10B5E,AS10E7E,BT.00604.048,BT.00605.061,BT.00605.063,BT.00606.007,BT.00606.009; Cell type:Li-ion; Capacity (mAh):4400MAH; Capacity Range (mAh):0-5000; Voltage (v):11.1V; Dimension (cm):26.959 x 4.85 x 2.39; Color:Black; Shipping Weight(Kg):0.32