The short version
- EcoFlow has launched the River 260 Gen4 and River 520 Gen4, which utilize lithium iron phosphate chemistry for greater stability and longevity.
- The devices offer high energy density relative to their size, capable of powering small appliances like refrigerators or serving as uninterruptible power supplies.
- Both models support direct DC charging via USB-C, eliminating the need for separate charging bricks, with European availability starting in late 2026.
EcoFlow has expanded its portable energy lineup with the introduction of the fourth-generation River series, focusing on compact design and enhanced battery chemistry. The new models, designated as the River 260 Gen4 and the River 520 Gen4, represent a shift toward smaller form factors that maintain significant power output capabilities. These devices are engineered to store substantially more energy than standard airline-approved power banks, offering users a reliable source of electricity for outdoor activities or emergency situations without the bulk associated with earlier generations of portable stations.
At the core of these new units is the adoption of lithium iron phosphate, or LFP, battery technology. This chemical composition is known for its durability and reduced volatility compared to traditional lithium-ion alternatives. By utilizing LFP cells, EcoFlow aims to provide a safer and longer-lasting power source. The River 260 Gen4 contains a 256 watt-hour capacity, while the larger River 520 Gen4 holds 512 watt-hours. This increase in storage allows the devices to handle more demanding loads, such as keeping a standard United States refrigerator operational for approximately four hours during a power outage.
Despite their increased capacity, the new stations are notably lighter and more compact than competitors with similar specifications. The River 260 Gen4 delivers a maximum continuous output of 300 watts through a single AC outlet, accompanied by four USB ports. The River 520 Gen4 steps up the power delivery to 500 watts of continuous output across two AC outlets, while retaining the same USB port configuration. This high energy density makes the units particularly suitable for short-term excursions, such as overnight camping trips or field photography sessions, where weight and space are critical constraints.
A key feature of both models is their ability to function as uninterruptible power supplies for computers. The system switches to battery power in less than 10 milliseconds when the main power source fails, ensuring that connected devices do not experience a disruption. This rapid cutover time is essential for protecting data and maintaining workflow continuity during unexpected blackouts. Additionally, the stations include a bidirectional USB-C port capable of 140 watts of power delivery, adhering to the PD3.1 standard.
The inclusion of the high-wattage USB-C port allows users to charge the power stations directly from compatible wall adapters or portable solar panels, bypassing the need for dedicated charging bricks. This flexibility simplifies the charging process and reduces the amount of equipment users must carry. EcoFlow has also optimized the internal energy conversion process to minimize losses when transforming stored direct current into alternating current. This efficiency improvement ensures that more of the stored watt-hours are available for powering devices such as drones, bicycles computers, smartphones, or compact internet routers like the Starlink Mini.
The design philosophy behind the River 4 series addresses common issues found in portable power stations, particularly the tendency for units to degrade if left idle for extended periods. By reducing the energy consumed during conversion processes, the batteries retain their charge more effectively over time. This enhancement is beneficial for users who may not use the device frequently but require it to be ready for immediate deployment during emergencies or occasional outdoor adventures.
Availability for these new power stations will begin in Europe, with the River 260 Gen4 scheduled for release in the fourth quarter of 2026. The larger River 520 Gen4 is expected to follow in the first quarter of 2027. Pricing details have not yet been disclosed by EcoFlow and are anticipated to be announced closer to the global launch dates. The staggered release schedule allows the company to gauge market response and refine production logistics before expanding distribution to other regions.
The introduction of these compact power solutions reflects a broader trend in consumer electronics toward miniaturization without sacrificing performance. As reliance on portable technology grows, the demand for efficient, lightweight energy storage becomes increasingly important. EcoFlow’s latest offerings aim to meet this need by combining advanced battery chemistry with user-friendly features, providing a versatile tool for both recreational and practical applications.
Sources behind this briefing
Go to the original reporting
- The Verge↗EcoFlow makes the miniature power station even smaller
