Display

Neither product is strong on display sophistication, but the EcoFlow RIVER 2 wins here because its app ecosystem and front-panel status display are typically clearer and more informative than the basic battery indicators found on budget units. The Powkey is functional, but it’s usually a simpler, less detailed experience. Winner: EcoFlow RIVER 2.

Performance

This is the biggest gap by far. The EcoFlow RIVER 2 has a 256Wh LiFePO4 battery and up to 600W output, which means it can handle laptops, routers, small kitchen gadgets, camera gear, and many low-to-mid wattage appliances with far more confidence. Its 1-hour fast charging is a major practical advantage: you can top it up quickly from mains before a trip or during a short power window. The Powkey’s 99Wh capacity and 100W output put it in a completely different class: it’s fine for phones, tablets, lights, and very small electronics, but it cannot meaningfully power demanding devices. If you want real versatility, EcoFlow wins decisively.

Build quality and design

EcoFlow again takes the lead. The RIVER 2 uses LiFePO4 chemistry, which is prized for safety, thermal stability, and long cycle life compared with older NMC-based batteries. That matters if you plan to use it regularly, not just once in a blue moon. The Powkey’s appeal is its compact, lightweight design and low price, but it feels more like a backup pack than a robust power station. For frequent travel, camping, or regular home use, the EcoFlow’s more premium engineering is the better long-term choice. Winner: EcoFlow RIVER 2.

Battery life

On raw stored energy, the EcoFlow is the clear winner at 256Wh versus 99Wh. That extra 157Wh is not a small difference; it roughly means more than double the runtime for the same device. In practical terms, the RIVER 2 can recharge phones many times, run a laptop for hours, or keep a small router and lights going through an outage. The Powkey is best thought of as an emergency top-up device, not a true power station for extended use. Winner: EcoFlow RIVER 2.

Price and value for money

The Powkey wins on upfront price because it costs £80.98 versus £219 for the EcoFlow, a difference of £138.02. If your needs are very modest and you just want a low-cost portable charger with AC/DC/USB/Type C outputs, the Powkey is easier to justify. However, value is not just about the sticker price: the EcoFlow gives you much more capacity, far higher output, LiFePO4 durability, and much faster charging. For anyone who will actually use the unit regularly, the EcoFlow is better value over time. Winner: EcoFlow RIVER 2 for overall value; Powkey only wins on initial cost.

Game library/features

There is no game library here, but in feature terms the EcoFlow offers the stronger package. It supports solar charging, app monitoring, faster recharge times, and a much more capable inverter/output stage. That makes it more suitable as a genuine solar generator for camping, RV use, and home backup. The Powkey offers the basics: multiple outlet types and portability, but fewer advanced features and far less headroom. Winner: EcoFlow RIVER 2.

Overall user experience

The EcoFlow RIVER 2 is the more satisfying product because it behaves like a proper power station rather than a novelty backup battery. It charges quickly, handles more devices, and has the capacity to be genuinely useful in outages or off-grid trips. The Powkey is easier to carry and much cheaper, but its 99Wh limit and 100W output severely restrict what it can do. If you want a device that feels capable rather than compromised, the EcoFlow is the one to buy.

Overall summary: EcoFlow RIVER 2 is the clear winner for most buyers. It costs more, but the jump in capacity, output, battery chemistry, and charging speed is substantial enough to justify the premium. The Powkey only makes sense if budget and ultra-light portability matter more than performance.