The beauty of the OLEV isn't just that it's electric, but that, because it charges while it's operating, it rarely needs long periods to recharge or huge batteries to store large quantities of power.

美妙之处并非只在于olev是电力驱动，而是因为他在运行时就自行充电，他几乎不需要长时间的充电或者使用大容量电池以储存大量的电能。

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Maybe it needs new batteries.

也许要换新电池了。

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One is the technology for batteries is still not as developed as it needs to be.

WHITEHOUSE: Shared Responsibility and Shared Prosperity Town Hall

U.S. battery makers acknowledge that Asian companies have a head start but say that they have an advantage when it comes to delivering batteries tailored to their customers' needs.

WSJ: U.S. Battery Makers Regroup as Electric-Car Market Proves Rough