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This battery for electric buses can give you high operation voltage with high energy density. It has long cycle life,Website:http://www.freybatteries.com, more than 500 charge/discharge cycles ( 800% capacity remained ). It is also minimal self-discharge, less than 10% monthly. Our battery for electric buses can be charged & discharged at anytime because of non-memory. Its environmentally compatible feature makes it beloved among the world.