Side-by-side comparison of price per watt-hour, capacity, and specs. Updated 2026-04-05.
Choose Generic E500LFP if you want better value per watt-hour. At $189.0 for 576Wh, it costs less per unit of stored energy.
Choose HELIOS 3600 if you prefer the 3600Wh capacity. The 3600Wh provides approximately 47.1 hours of laptop runtime vs 7.5 hours.
Not sure what capacity you actually need? Use our size calculator to find out. To see which station runs your specific devices longest, try the runtime calculator.
The 2% difference is relatively small. In this case, other factors like warranty, brand support, and specific features may matter more than $/Wh alone.
Generic E500LFP: LiFePO4. HELIOS 3600: LiFePO4. LiFePO4 batteries last 2,000-4,000 cycles vs 300-800 for standard Li-ion — an important consideration for long-term value. See our full comparison.