Add extra power to your EcoFlow Delta 2 Max The EcoFlow Delta 2 Max Smart Extra Battery is a handy addition for your Delta 2 Max power station. By simply connecting the included cables, you can double the capacity of the Delta 2 Max Powerstation to over 4000 Wh. With two Extra Batteries even up to 6000 Wh. The Delta 2 Max Smart Extra Battery is compatible with the Delta 2 Max, the Delta Max 2000 and the Delta 2. So with these extra batteries, you have even more power and flexibility at your disposal. Compatible with different models The EcoFlow Delta 2 Max Smart Extra Battery is compatible with the Delta 2 Max, the Delta Max 2000 and the Delta 2, giving you even more power and flexibility at your disposal with these extra batteries. Whether you are using the Delta 2 Max Powerstation for an outdoor adventure, on a construction site or just for emergencies, with the extra batteries you can be sure you will always have enough power.