Portable power stations have become essential for camping, outdoor adventures, emergency backup, and off-grid applications. Among the top choices in the market, the Anker 521 vs EcoFlow River 3 stand out for their compact size, reliable performance, and advanced battery technology.
This in-depth comparison will explore key differences in battery capacity, power output, charging speed, portability, durability, and overall user experience to help determine which of these power stations is the better investment.
Contents
Differences Anker 521 vs EcoFlow River 3
Below is a summary of the specifications:
Battery Capacity and Lifespan
Battery capacity directly impacts how long a power station can run your devices before needing a recharge.
The Anker 521 features a 256Wh LiFePO₄ battery, which is slightly larger than the 245Wh capacity of the EcoFlow River 3. However, both models use LiFePO₄ (LFP) battery technology, known for its long lifespan and durability, providing 3,000+ charge cycles before dropping to 80% capacity.
Both power stations are suitable for charging small devices, such as smartphones, tablets, and small laptops, but the extra 11Wh in the Anker 521 offers a slight advantage in runtime.
Winner: Anker 521
With a slightly larger battery, the Anker 521 has a small advantage in capacity and runtime.
Power Output and Device Compatibility
Power output determines which devices a power station can run efficiently.
The EcoFlow River 3 offers 300W of continuous AC output and a 600W surge capacity, making it more suitable for small appliances, CPAP machines, and larger electronics. In contrast, the Anker 521 delivers 200W of continuous power with a 400W surge, which is sufficient for basic camping essentials and phone/laptop charging but struggles with higher-power devices.
Additionally, the EcoFlow River 3 includes a more powerful 100W USB-C port, whereas the Anker 521 only supports 45W USB-C charging, making the River 3 a better choice for charging power-hungry laptops and USB-C devices.
Winner: EcoFlow River 3
With higher AC output, a stronger surge capacity, and a 100W USB-C port, the EcoFlow River 3 is the superior choice for powering more demanding devices.
Charging Speed and Solar Input
Fast charging ensures quick power replenishment, reducing downtime during travel or emergencies.
The EcoFlow River 3 is significantly faster, charging from 0% to 100% in just 1.5 hours via AC power, compared to 4.5 hours for the Anker 521. Additionally, the River 3 supports up to 110W of solar input, whereas the Anker 521 is limited to 65W, meaning EcoFlow’s model charges faster via solar power as well.
For users relying on solar panels for off-grid charging, the EcoFlow River 3 is the better choice.
Winner: EcoFlow River 3
With faster AC charging and a higher solar input, the EcoFlow River 3 outperforms the Anker 521 in recharge speed.
Portability and Weight
For users who prioritize portability, both power stations are compact and lightweight, making them easy to carry for travel, camping, and emergencies.
The EcoFlow River 3 is slightly lighter at 7.7 lbs (3.5 kg) compared to the Anker 521 at 8.2 lbs (3.7 kg). While the difference is minor, those seeking maximum portability may find the EcoFlow River 3 more convenient.
Winner: EcoFlow River 3
Although both models are highly portable, the EcoFlow River 3 is slightly lighter and easier to carry.
Durability and Battery Longevity
Both models use LiFePO₄ battery technology, which provides 3,000+ cycles before reaching 80% capacity. This makes both power stations highly durable and capable of lasting for years with regular use.
Winner: Tie
Both Anker 521 and EcoFlow River 3 offer long-lasting battery performance with LFP technology.
Quick Rundown Of Anker 521
Quick Rundown Of EcoFlow River 3
Conclusion
The EcoFlow River 3 emerges as the superior choice for users needing more power, faster charging, and better solar compatibility. With higher AC output, faster recharge times, and a more powerful USB-C port, it is better suited for users who need a compact but powerful power station for camping, off-grid charging, and emergency use.
The Anker 521, however, remains a great budget-friendly alternative for users who prioritize affordability and a slightly larger battery capacity over faster charging and higher power output.
Final Recommendation
- Choose the EcoFlow River 3 if you need higher power output, faster charging, and better solar performance.
- Choose the Anker 521 if you prioritize affordability and slightly longer runtime per charge.
For most users, the EcoFlow River 3 is the superior option, offering better overall performance and versatility.