Each Power Pack can be made for around $5, says Mr Lifton, which is comparable to the cost of the platinum alone in a direct-methanol fuel cell.

Lifton先生称每块Power Pack的制造成本只要5美元，这只相当于直接燃料电池中铂的价格。

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Meanwhile, Ford, Nissan, Audi, key Chinese and other automakers are lightweighting with familiar metals, saving somewhat less fuel at a comparable cost per gallon.

CNN: Freeing America from its addiction to oil