A Expandable capacity - Increase the capacity of DELTA 2 with an extra 1024Wh. A Double power at up to 30% lower cost - 2kWh expandable capacity to fit your energy storage needs. And it&';s up to 30% more affordable than a power station of the same capacity. A 10-year lifespan with an LFP battery - Get 10 years of daily use until it hits 80% of its original capacity. Embrace the 3000+ charging cycles enabled by the LFP battery chemistry. A Easy to use - Plug-and-play without setup. And use the EcoFlow app to monitor and control the DELTA 2 Smart Extra Battery. A 5-Year Full Warranty - With one of the most comprehensive warranties in the industry, we go the extra mile to give you peace of mind.