Check the listing for details. EcoFlow DELTA 2 Smart Generator Extra Battery 1024Wh for Outdoor, RV, LiFePO4. Color: Black, Condition: New. Listed at 799.00 USD. Please note that this is an extra battery of DELTA 2 Power Station. Expandable Capacity DELTA 2 expands up to 2048Wh with smart extra battery, keeping your home powered on in any emergency. Convenient Recharging DELTA 2 and its Extra Battery charge and discharge in unison. Recharging from portable solar panels, AC outlets, or our Smart Generator is easy. Fast Recharging Charge up with DELTA 2 from 0-80% in 80 minutes and 0-100% in 130 minutes with AC input. Internal Storage Compartment Get extra storage for accessories conveniently, saving space at home or on the go. Power Multiple Devices DELTA 2 fits with every port you'll ever need to power any devices anywhere, so you will always feel right. Control from anywhere Get all the same info about battery percent, remaining recharge time, hours left, and more on the built-in screen. You can check the battery's status anywhere from the EcoFlow app.