The Acer Aspire 1410T 521 752 1810 8172 Laptop Battery Primary Battery Pack is a 6-cell, rechargeable, Lithium Ion battery designed to work with various Acer series portable computers.Used as either a spare or replacement battery, this battery pack meets or exceeds the specifications of the original battery that came with your notebook. It interfaces with the Acer Power Saver Utility on the notebook which features a charge indicator to help you monitor the available power.