In the world of portable power stations, both the Anker 521 vs Bluetti EB3A have carved a reputation for reliability, convenience, and performance in the entry-level category. Whether you’re heading on a weekend camping trip, preparing for emergencies, or looking for a reliable way to keep your devices powered on the go, these two units stand out.
But which one truly delivers more value and versatility? Let’s compare them in every key aspect.
Contents
Differences Anker 521 vs Bluetti EB3A
Below is a summary of the specifications:
Battery Capacity, Expandability, and Battery Lifespan
The Bluetti EB3A leads slightly in raw capacity with 268Wh, compared to the 256Wh on the Anker 521. While this difference may seem minor, every extra watt-hour counts when powering devices over long durations. Both units use LiFePO₄ battery chemistry, offering significantly longer lifespan and thermal stability than traditional lithium-ion.
In terms of longevity, Anker rates its battery at 3,000+ cycles to 80%, while Bluetti offers 2,500+ cycles. Neither unit supports expandable capacity, locking users into the base battery size.
Winner: Anker 521
Slightly better longevity and cycle count give Anker the upper hand, even if capacity is marginally smaller.
Power Output and Device Compatibility
This category exposes one of the most significant differences. The Anker 521 delivers 200W of continuous AC power and can handle 450W surges, which is sufficient for small electronics like phones, laptops, or a CPAP.
The Bluetti EB3A, in contrast, features 600W AC output and can surge up to 1,200W. This allows it to run mini fridges, fans, power tools, and even coffee makers—tasks the Anker 521 simply cannot handle.
Winner: Bluetti EB3A
Three times the output wattage and double the surge capacity put Bluetti far ahead in device compatibility.
Charging Speed and Solar Input
Charging speed is a major win for the Bluetti EB3A. With 430W AC input, it can reach 80% in 30 minutes and a full charge in under an hour. It also supports 200W solar input, allowing efficient off-grid recharging.
Meanwhile, the Anker 521 is limited to 65W AC and solar input, needing over 2.5 hours to reach 80%, and much longer in outdoor conditions.
Winner: Bluetti EB3A
Faster wall and solar charging ensure it’s ready to go when you are.
Ports and Output Variety
The Anker 521 includes one 60W USB-C port, two USB-A ports at 12W each, a 12V car socket, and a single AC outlet. It’s practical, but limited for powering multiple devices at once.
The Bluetti EB3A is far more versatile, offering a 100W USB-C port, two 15W USB-A ports, a 12V/10A car port, dual AC outlets, and even a wireless charging pad on top—an unexpected bonus in a budget model.
Winner: Bluetti EB3A
More outputs, higher wattage ports, and wireless charging make it the better multitasker.
Portability and Weight
The Anker 521 is slightly lighter at 9.57 lbs compared to the 10.14 lbs of the Bluetti EB3A. Their dimensions are similar, but the Anker’s curved edges and integrated handle give it a more ergonomic, streamlined feel.
However, the weight difference is negligible in real-world use, and both units are easy to transport for camping, picnics, and daily use.
Winner: Anker 521
Slightly more compact and lighter for everyday grab-and-go convenience.
Connectivity and Smart Features
The Anker 521 is a basic unit with no connectivity options. It’s simple, reliable, and easy to operate but lacks any remote monitoring.
In contrast, the Bluetti EB3A supports both Wi-Fi and Bluetooth, giving users full access via the Bluetti App. Through your phone, you can monitor charge status, input/output levels, toggle ports on or off, and update firmware remotely.
Winner: Bluetti EB3A
The smart control app brings a new level of convenience and control, making it a clear leader in this category.
Quick Rundown Of Anker 521
Quick Rundown Of Bluetti EB3A
Conclusion
Both the Anker 521 and Bluetti EB3A are excellent compact power stations, but they are clearly designed for different types of users. If you need something lightweight, ultra-reliable, and built for basic charging tasks, the Anker 521 is an excellent pick with top-tier build quality and long battery life.
However, for users who prioritize power, speed, connectivity, and versatility, the Bluetti EB3A delivers unmatched value. It packs a bigger punch, supports smart features, recharges in record time, and includes more port variety—even wireless charging.
Overall Winner: Bluetti EB3A
From performance to smart functionality, the EB3A sets a new benchmark for entry-level portable power stations.