求翻译：Envia公司说，其开发出的电池基于先进的负极技术，每公里可产生400瓦时的电力，估计每瓦时成本为125美元。该公司介绍说，如今电动车所用的电池一般每公里发电80－150瓦时，每瓦时成本达到250－350美元。是什么意思？

envia company, developed a battery based on advanced cathode technology, per kilometer can produce 400 watts of electricity, estimated the cost per watt for $ 125. The company said that when the batteries are generally used by electric vehicles, power 80-150 watts per kilometer, per-watt cost of 250

Envia company said that its development of the negative battery based on the advanced technology, KM can produce 400 watts of electricity per kWh, the estimated cost is $125. According to the company said that today the power of a battery per km power 80 - 150 Watts, per watt cost is $250 - 350.

Envia Corporation said, it develops the battery based on the advanced cathode technology,

Envia company says its battery anode based on advanced technology developed, can produce 400 Watts of power per kilometre, estimated cost $ 125 per MWh. The company said that, now battery used in electric vehicles per kilometre of power 80-150 WHr, cost per watt reached $ 250-350.