A lithium-air battery pulls oxygen from the air for its charge, so the device can be smaller and more lightweight.
锂空气电池从空气中吸收氧气充电，因此这种电池可以更小、更轻。
2
Lithium cobalt oxide accounts for 30% of the cost of a lithium-ion battery. Air, however, is free.
锂钴氧化物的成本占到锂离子电池的30%，而空气却是免费的。
3
Hydrogen is provided by an onboard 35MPa storage tank and air is fed to the fuel cell from a blower. The electric power generated is fed to a lithium battery of the electric drive.