CWK New Replacement Laptop Notebook Battery for Acer UM08A51 UM08A52 UM08A72 UM08A73 Acer Aspire A0A110 A0A150 UM08B31 UM08B51 934T2780F UM08A52 Acer Aspire ONE Acer Aspire One AOA110 UM08A31 AOA Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!