Portable power stations have become an essential tool for outdoor enthusiasts, emergency preparedness, and remote workers needing reliable power on the go. Two leading contenders in the mid-range portable power category are the Anker 535 vs EcoFlow River 2 Max. Both models offer solid performance, but their features, battery technology, and power capabilities differ significantly.
In this in-depth comparison, we analyze their battery capacity, power output, charging speed, portability, durability, and smart features to help you decide which one best suits your needs.
Contents
Differences Anker 535 vs EcoFlow River 2 Max
Below is a summary of the specifications:
Battery Capacity and Expandability
Battery capacity is a key factor when choosing a portable power station, as it determines how long you can run your devices before needing to recharge. Both the Anker 535 and the EcoFlow River 2 Max feature a 512Wh battery, making them suitable for powering small appliances, laptops, CPAP machines, and charging multiple devices.
However, neither model offers expandable battery options, meaning users cannot increase their power capacity by adding extra batteries. While this may not be an issue for short trips or emergency backup, those needing longer runtimes might need to look at higher-capacity models.
Winner: Tie
Both models have the same battery capacity and no expansion options.

Power Output and Device Compatibility
Power output is a crucial aspect to consider when determining what devices you can run. Both power stations offer a 500W continuous power output, which is sufficient for small appliances, fans, lights, and laptops. However, the surge capacity differs.
The Anker 535 has a 750W surge capacity, whereas the EcoFlow River 2 Max provides 1,000W surge power, meaning it handles short bursts of power demand better, making it more suitable for running devices with high startup power like small refrigerators or power tools.
Additionally, the EcoFlow River 2 Max offers two USB-C ports with 100W power delivery, while the Anker 535 only has one USB-C port at 60W. This makes the River 2 Max a better option for fast-charging laptops, tablets, and other USB-C devices.
Winner: EcoFlow River 2 Max
With a higher surge capacity and better USB-C charging options, the River 2 Max is the better choice for power-hungry devices.
Charging Speed and Solar Input
Fast charging is one of the standout features of the EcoFlow River 2 Max. With X-Stream fast charging technology, it reaches 80% in just 1 hour and 100% in 1.5 hours, making it one of the fastest charging power stations in its category.
The Anker 535, in comparison, takes 2.4 hours to charge fully from an AC outlet. While this is still relatively fast, it is noticeably slower than the EcoFlow River 2 Max.
When it comes to solar charging, both models support solar panels. The EcoFlow River 2 Max has a 220W maximum solar input, slightly higher than the Anker 535’s 200W input, allowing it to recharge more quickly using solar power.
Winner: EcoFlow River 2 Max
With faster AC charging and slightly better solar input, the EcoFlow River 2 Max is the superior choice for quick recharging.

Portability and Weight
For outdoor use, portability is a key consideration. The EcoFlow River 2 Max weighs 13.4 lbs (6.1 kg), while the Anker 535 weighs 16.7 lbs (7.6 kg). While both models are lightweight and easy to carry, the EcoFlow River 2 Max is slightly lighter, making it a better choice for users who prioritize portability.
Winner: EcoFlow River 2 Max
With a lighter and more compact design, the River 2 Max is easier to carry and transport.
Durability and Battery Lifespan
Both power stations use LiFePO₄ (LFP) battery technology, known for long-lasting performance and enhanced safety. These batteries offer over 3,000 charge cycles, meaning they will last for years of regular use before losing significant capacity.
Since both models share the same battery type and lifespan, there is no clear winner in this category.
Winner: Tie
Both power stations offer excellent durability with LiFePO₄ battery technology.
Connectivity and Smart Features
In today’s market, smart app integration is becoming a must-have feature for power stations, allowing users to monitor and control their power usage remotely.
The EcoFlow River 2 Max comes with Wi-Fi and Bluetooth connectivity, enabling app-based control via the EcoFlow app, where users can adjust settings, monitor battery levels, and optimize power output.
The Anker 535 does not offer app connectivity, meaning users must rely solely on the built-in display for monitoring power usage.
Winner: EcoFlow River 2 Max
With Wi-Fi and Bluetooth connectivity for remote control, the River 2 Max offers a more modern user experience.
Quick Rundown Of Anker 535
Quick Rundown Of EcoFlow River 2 Max
Conclusion
The EcoFlow River 2 Max is the clear winner in this comparison. It charges significantly faster, has a higher surge capacity, includes dual USB-C ports for faster charging, and offers smart app control. It is ideal for users who need a portable, fast-charging power station with modern features.
The Anker 535 is still a good choice for those who prefer a straightforward, reliable power station without the need for smart features. However, it falls short in charging speed, surge power, and connectivity options.
Final Recommendation:
- Choose the EcoFlow River 2 Max if you prioritize fast charging, higher surge power, and smart app control.
- Choose the Anker 535 if you want a simple, durable power station without extra smart features.
For performance, speed, and modern features, the EcoFlow River 2 Max is the superior choice.