The EcoFlow River 3 is a compact 245Wh portable power station featuring a 300W output (600W X-Boost) and LiFePO4 battery, designed for fast charging (1 hour) and <20ms UPS backup. It is 30% smaller than average, features whisper-quiet operation (<30dB), and is IP54 water-resistant, making it ideal for portable power and emergency, notes.