Increase the capacity of DELTA 3 Plus/DELTA 3 with an extra 1024Wh.. Get 10 years of daily use until it hits 80% of its original capacity. Embrace 3000+ charging cycles enabled by the LFP battery chemistry.. Plug-and-play system. Use the EcoFlow app to monitor and control the DELTA 3 Smart Extra Battery.. With one of the most comprehensive 5-year warranties available, we go the extra mile to give you peace of mind.Increase the capacity of DELTA 3 Plus/DELTA 3 with an extra 1024Wh.. Get 10 years of daily use until it hits 80% of its original capacity. Embrace 3000+ charging cycles enabled by the LFP battery chemistry.. Plug-and-play system. Use the EcoFlow app to monitor and control the DELTA 3 Smart Extra Battery.. With one of the most comprehensive 5-year warranties available, we go the extra mile to give you peace of mind.