Battery Type: 3 Cell , Voltage &Capacity:11.1V 24Wh 2.09AH or 11.4V 24Wh 2.06Ah , in fact , 11.1V is same as 11.4V , because one cell voltage is 3.7V or 3.8V. Note: This battery is external for your laptop. those laptop maybe have two pcs batteries. other is internal.