Note: This is DELTA Pro Extra Battery. It can only be connected to DELTA Pro to use. Make it a triple.Double or triple the capacity of your DELTA Pro to 7.2kWh or 10.8kWh. That’ll give you days of power for your essential appliances.Charge anytime, anywhere.DELTA Pro’s Smart Extra Battery benefits from all the charging methods DELTA Pro has, including 6500W MultiCharge. That means you can charge anytime, anywhere as long as your extra battery is connected to DELTA Pro. Once connected, they’ll charge/discharge in unison, keeping the battery percent level across both units.Ready for any emergency.When the going gets tough and you’re out of charge options, get a 1800W DC fast charge with EcoFlow Smart Generator (sold separately). Just plug the generator directly into your extra battery via the port on the back. This works even when disconnected from your DELTA Pro.Stay informed.The Smart Extra Battery sports a bright LCD screen on the front of the unit giving you all the info you need. Output, input, remaining charge and time remaining. It’s all there. Need on the go info? The EcoFlow app can tell you all that & a whole lot more.What's in the box1.DELTA Pro Smart Extra Battery 2.DELTA Pro Extra Battery Cable 3.Handle Cover 4.User Manual SpecsModel NameDELTA Pro Smart Extra BatteryCapacity3600WhBattery ChemistryLFPBattery Cycle Life6,500 cycles to 50% capacity, 3,500 cycles to 80% capacityShelf Life1 year (after a full charge)Dimension25 x 11.2 x 16.4 in / 63.5 x 28.5 x 41.6 cmWeightApprox. 84lbs / 38kgDisclaimer *Qualifying battery storage technology of 3kWh or more must be installed by a connection to a dwelling in the United States, lived in by the taxpayer. You should always consult your tax professional to determine your eligibility for the Residential Clean Energy Credit under Section 25D of the Internal Revenue Code given your individual situation. EcoFlow does not guarantee any tax credit based on our products, and any information we provide is for educational purposes only and should not be considered legal advice. It does not constitute professional tax advice or financial guidance. It should not be used as the only source of information when making purchasing decisions, investment decisions, tax decisions, or execution. Consult a tax professional to evaluate your eligibility.Effective date: Jan 1, 2023