How do Fe-Ni batteries stack up against the dominant lithium-ion technology?
| Feature | Iron-Nickel | Lithium-Ion |
|---|---|---|
| Lifespan | 20–30 years | 5–10 years |
| Energy Density | Low (~50 Wh/kg) | High (~250 Wh/kg) |
| Safety | Very safe, no thermal runaway | Risk of overheating/fire |
| Cost | Moderate (long-term cost-effective) | High initial cost |
| Maintenance | Requires upkeep | Maintenance-free |
Verdict: Fe-Ni batteries win in longevity and safety, while Li-ion excels in energy density and convenience.
