Milwaukee's M18 REDLITHIUM XC5.0 Extended Capacity Battery Pack (48-11-1850) included in this combined SKU enhances runtime and jobsite productivity by delivering sustained power output across the full discharge cycle. Designed for compatibility with the M18 system, these batteries maintain performance under load while supporting extended tool use in high-demand environments. The combination of the FUEL impact driver and XC5.0 battery pack provides a balanced cordless solution for professional contractors and advanced DIY users who require dependable fastening performance, longer runtime between charges, and consistent output across a wide range of construction and renovation applications.