Li-ION Notebook/Laptop Battery for Acer LC.BTP00.017 UM08A72 UM08A73 UM08B72 UM0B873 UMO8A31 This battery is compatible to many Acer batterries. - Black Model No. UM08B74 / cell type = 6 cell (li-lon) Main COMMON Macles Black - 11.1v Brand New Batteries - Never opened Never Used