Our Verdict
Anker 535 Wins

It offers superior 512Wh capacity, 500W AC output, and a durable LiFePO4 battery chemistry. Choose EnginStar R300 for its lighter 6.5 lbs design and if 296Wh/300W is sufficient.
Bottom Line: Anker 535 is the better choice. It offers superior 512Wh capacity, 500W AC output, and a durable LiFePO4 battery chemistry.
Key Differences
The most significant spec differences at a glance
Battery Capacity
73% moreAC Output
67% moreAC Outlets
100% moreAdvantages
Where each product wins
Anker
- Battery Capacity: 73% higher (512 vs 296)
- AC Output: 67% higher (500 vs 300)
- AC Outlets: 100% higher (4 vs 2)
Who Should Buy Which?
Find the right product for your needs
Buy Anker if...
Anker 535 Portable Power
The Anker 535 Portable Power Station is ideal for users who need substantial power and long-term reliability for outdoor adventures, RV travel, or emergency home backup. If you prioritize a high 512Wh capacity, a robust 500W AC output to run multiple devices simultaneously, and the long-lasting safety of a LiFePO4 battery, this product is worth the investment. It suits those powering laptops, mini-fridges, or multiple small appliances, requiring a durable solution that can handle more demanding tasks without frequent recharging.
Buy EnginStar if...
EnginStar Portable Power Station
The EnginStar Portable Power Station is perfect for the budget-conscious user seeking a lightweight, compact power source for casual outdoor activities like short camping trips, car travel, or basic personal device charging. If portability (6.5 lbs), a lower price point ($199.99), and sufficient 296Wh capacity for powering smaller electronics or a CPAP machine are your main concerns, this is an excellent choice. It’s for users who don't need heavy-duty output but value multiple charging methods and 1000+ cycle longevity for everyday use.
Spec Comparison
11 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $280 | $200 |
| Rating | 4.6(399) | 4.3(1.4k) |
| Capacity Wh | 512W | 296W |
| Chemistry | LiFePO4 | Li-ion |
| AC Output Watts | 500W | 300W |
| AC Outlets | 4 | 2 |
| USB C Ports | 1 | 1 |
| Peak Output Watts | 750W | — |
| Dc Ports | — | 2 |
| Cycle Life | — | 1000 |
| Weight | — | 6.5 lbs |
| USB A Ports | — | 1 |
| Model Number | — | R300 |
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Pros & Cons
Quick overview of strengths and weaknesses
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.
EnginStar Portable Power
- Lightweight 6.5 lbs for easy portability
- 300W pure sine wave AC output protects devices
- 8 output ports charge multiple items concurrently
- Three recharge methods: wall, car, solar panel
- Solar panel not included; separate purchase required
- Max 65W input speed; slower full recharge
- Requires charging every 2-3 months for upkeep
Frequently Asked Questions
Common questions about this comparison
Which is better for extended camping trips?
The Anker 535 is better for extended camping with its 512Wh capacity and 500W AC output, providing more power for longer. The LiFePO4 battery also offers greater durability for frequent use.
What's the main difference in battery chemistry?
The Anker 535 uses LiFePO4, known for its longer lifespan and enhanced safety. The EnginStar R300 uses Li-ion, which is lighter but generally has fewer charge cycles (1000+ specified vs. 3000+ for LiFePO4).
Which power station can handle more demanding appliances?
The Anker 535 can handle more demanding appliances with its 500W continuous AC output and 750W peak. The EnginStar R300 is limited to 300W, making the Anker more versatile for higher-power devices.
Is one more portable than the other?
Yes, the EnginStar R300 is more portable, weighing only 6.5 lbs. The Anker 535, with its larger capacity and LiFePO4 battery, is typically heavier, making the EnginStar better for ultralight needs.
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