11.10V,2200mAh,Li-ion,UMPC, NetBook & MID Battery Replacement for ACER Aspire One 8.9",UM08A51, UM08A52, UM08A72 Battery Type: Lithium-ion | Color: Black Voltage: 11.10V | Capacity: 2200mAh Rate: 24.00 Wh | No. of cell: 3 | Weight: 212.65 g Compatible Battery Part Numbers: bt.00304.001, LC.BTP00.043, UM08A31, UM08A51, UM08A52, UM08A72, UM08A73 New, 1 year warranty! Please ensure the product(s) that you are going to buy fits the brand, model, part number and dimension of your device.