The battery manufacturing process also took nearly two years of trials, and in 2007 they finally succeeded in developing an environmentally friendly battery that's free of lead contamination risk, won't ignite or explode, has a long life, and can discharge a high electric current.
電池的製造也歷經近 2 年摸索，2007 年成功研發出具有無鉛污染、不爆炸、不起火、循環使用壽命長、可進行大電流充放電等特性的環保電池。