Always on the go? No more worries about running out of battery power! You can back up your system with this 9-Cell Additional Lithium-Ion Battery. It lets you work seamlessly when you are on the move for business trips or vacations. This battery offers long life and consistently reliable performance you need to get the most out of your system. Guaranteed for the following laptops: Acer Aspire One A110 A150 AOA110 AOA150 ZG5 (Linux) Series, Acer Aspire One 10.1 inch AOD150 AOD250 Series. Compatible part# UM08A31 UM08A51 UM08A71 UM08A72 UM08A73 UM08A74 UM08B31 UM08B51 UM08B71 UM08B72 UM08B73 UM08B74.