Our Verdict
Anker 535 Wins
It offers superior capacity (512Wh vs 256Wh) and AC output (500W vs 300W). Choose Anker 521 for a more compact and lighter option when lower power needs suffice.
Bottom Line: Anker 535 is the better choice. It offers superior capacity (512Wh vs 256Wh) and AC output (500W vs 300W).
Key Differences
The most significant spec differences at a glance
Battery Capacity
50% lessAC Output
40% lessAC Outlets
50% lessPeak Output
20% lessAdvantages
Where each product wins
Anker
- Battery Capacity: 50% higher (256.0 vs 512)
- AC Output: 40% higher (300.0 vs 500)
- AC Outlets: 50% higher (2 vs 4)
- Peak Output: 20% higher (600.0 vs 750)
Who Should Buy Which?
Find the right product for your needs
Buy Anker if...
Anker 521 Portable Power
The Anker 521 is perfect for individuals prioritizing portability and budget for their power needs. If you need a reliable backup for short power outages, car camping, or charging laptops and phones on a day trip, its 256Wh capacity and 300W AC output are ideal. It's also great for powering small tools or medical devices where a lighter, more compact unit is essential, without overspending on excess capacity you won't use.
Buy Anker if...
Anker 535 Portable Power
The Anker 535 is designed for users demanding substantial power and extended runtime for more rigorous outdoor adventures, small RVs, or robust home backup. If you frequently power multiple appliances like a mini-fridge, larger laptops, or need simultaneous charging for several devices via its four AC outlets, the 512Wh capacity and 500W output make it the superior choice. Its robust capability justifies the higher investment for serious power users.
Spec Comparison
9 specs compared
| Specification |  |  |
|---|---|---|
| Price | $150 | $280 |
| Rating | 4.4(3.0k) | 4.6(399) |
| Capacity Wh | 256W | 512W |
| Chemistry | LiFePO4 | LiFePO4 |
| AC Output Watts | 300W | 500W |
| Dc Ports | 1 | — |
| AC Outlets | 2 | 4 |
| Weight | 8.16 lbs | — |
| USB A Ports | 2 | — |
| USB C Ports | 1 | 1 |
| Peak Output Watts | 600W | 750W |
Swipe horizontally to see all columns
Pros & Cons
Quick overview of strengths and weaknesses
Anker Anker 521
- LiFePO4 battery provides 10-year lifespan
- Peak 600W output handles high-draw appliances
- 60W USB-C PD port recharges laptops quickly
- Six outputs: 2 AC, 1 USB-C PD, 2 USB-A, 1 DC
- 8.16 lbs unit weight impacts portability
- 256Wh capacity limits high-draw use cases
- Solar charging requires separate panel purchase
Anker Anker 535
- 512Wh capacity offers substantial portable power.
- LiFePO4 battery ensures long lifespan, increased safety.
- 500W AC output handles common household electronics.
- Four AC outlets power multiple devices simultaneously.
- 500W continuous output limits demanding appliances.
- Only one 60W USB-C Power Delivery port included.
- Solar charging requires separate panel purchase.
Frequently Asked Questions
Common questions about this comparison
Which power station is better for extended camping trips?
The Anker 535 is better for extended camping due to its significantly larger 512Wh capacity, offering longer power supply for more devices. The Anker 521's 256Wh is suited for shorter trips or lighter usage needs.
What's the main difference in capacity and AC output between the two models?
The Anker 535 has double the capacity at 512Wh compared to the 521's 256Wh. It also offers a higher continuous AC output of 500W, while the 521 provides 300W, both using LiFePO4 chemistry.
Is the Anker 535's higher price worth it?
Yes, if you need more power and more AC outlets. The Anker 535 provides double the capacity (512Wh) and a higher AC output (500W) with two extra AC outlets, justifying the investment for heavier use.
Which unit is more portable?
The Anker 521 is more portable, weighing 8.16 lbs. The Anker 535, with its larger capacity and higher power output, is heavier. The 521 is better if weight is your primary concern for portability.
Related Comparisons
Similar products people compare
Anker vs GRECELL
$150 vs $260
Anker vs Jackery
$150 vs $179
Anker vs EF ECOFLOW
$280 vs $388
Anker vs Anker
$280 vs $250
Anker vs Jackery
$280 vs $179
ALLWEI vs Anker
$249 vs $280
Anker vs Jackery
$280 vs $429
Anker vs EF ECOFLOW
$150 vs $159
Anker vs EnginStar
$280 vs $200
Anker vs VTOMAN
$150 vs $140
Anker vs ZeroKor
$150 vs $160
Anker vs Anker
$150 vs $250
ALLWEI vs Anker
$139 vs $150
ALLWEI vs Anker
$249 vs $150
Anker vs EnginStar
$280 vs $200
Explore Other Categories
Popular comparisons across the site
Ask AI
Get instant answers about specs
Get the Deets
Ask our AI assistant
Ask Deets anything!