Szabad energia, olyan gépek, amelyek sértik az energiamegmaradás törvényét.
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#320
"Durability, service life, and special requirements for some type of cells. Stationary applications typically require more than 40,000 hours of reliable operation at a temperature of -35 °C to 40 °C, while automotive fuel cells require a 5,000 hour lifespan (the equivalent of 150,000 miles) under extreme temperatures."
Forrás: Wikipedia