Yes they offer the ultimate in flexibility.
YES - THEY OFFER THE The EGO Pro X range redefines professional battery powered tools, delivering maximum flexibility and choice. So that professionals can choose to work in the best way to suit the job – every Pro X tool is compatible with all EGO battery options*, offering ultimate efficiency to complete any job of any size. The EGO Pro X Backpack Harness can be used to redistribute the weight of the battery when required, and the EGO Pro X Backpack battery can be used for tasks that require a longer run time.