EcoFlow makes the miniature power station even smaller

The River 260 Gen4 (on the table) powering a portable fridge, Starlink Mini, and charging a phone. | Image: EcoFlow If you're in the market for a tiny power station that punches well above its size and weight then have a look at EcoFlow's new fourth-generation River series. The River 260 Gen4 features a 256Wh capacity battery while the 520 Gen4 packs in 512Wh - storing about 2.5x and 5x the energy of the largest airline-approved power banks, respectively.