Please note that this is an extra battery of DELTA 2 Power Station. Expandable CapacityDELTA 2 expands up to 2048Wh with smart extra battery, keeping your home powered on in any emergency.Convenient RechargingDELTA 2 and its Extra Battery charge and discharge in unison. Recharging from portable solar panels, AC outlets, or our Smart Generator is easy.Fast RechargingCharge up with DELTA 2 from 0-80% in 80 minutes and 0-100% in 130 minutes with AC input.Internal Storage CompartmentGet extra storage for accessories conveniently, saving space at home or on the go.Power Multiple DevicesDELTA 2 fits with every port you'll ever need to power any devices anywhere, so you will always feel right.Control from anywhereGet 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.