Expand the power of your portable power station with the EcoFlow River 3 Plus extra battery. It adds 286Wh, boosting total capacity to 858Wh—perfect for power outages or outdoor adventures. Use it independently with the 140W USB-C port to charge small devices or recharge the battery. With an IP65 waterproof rating, it's built for reliable outdoor use. | EcoFlow River 3 Plus Extra Battery - 286Wh