Costco Members: EcoFlow RIVER 3 Plus Smart Extra Battery (EB600) $266 + Free Shipping

Costco NEXT offers the Ecoflow River 3 Plus Plug and Play EB600 Extra Battery for $259.99, down from $319.99 with a 20% discount. The EB600 triples the capacity of River 3 Plus/Wireless from 286Wh to 858Wh and features additional 140W of USB-C input and output option, a wireless Pogo Pin connection, and the ability to be used independently to reduce load. Ideal for those who purchased the Costco River 3 Plus Wireless deal to add capacity.