The Delta Max device can be connected to the Delta Max Smart Extra Battery via the additional battery port on the side to provide an extended power source. The EcoFlow Wave 2 can be connected to EcoFlow power supplies and additional batteries for longer operating time. Supported devices include the Delta Max, Delta 2, and Delta Max Extra batteries. With the help of an additional EcoFlow Delta Pro to Smart Generator adapter, the Wave 2 can also be connected to the Delta Pro and Delta Pro Extra batteries. It is possible to connect the EcoFlow Delta Max to the Delta Max Smart Extra Battery or the Smart Generator using this cable.