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4. Battery holder and battery chamber （電池座和電池室）

(1)Design a battery chamber which the electric is not connected when a battery was reversed. Describe the correct loading direction of battery surely and indelibly on a battery chamber.

  （設計電池室以防因電池顛倒而引起的電流不通。描繪電池正確的加載方向于電池室里，確保其無疑并不可磨滅）

(2)Design a battery chamber which other size batteries can not be inserted or connected.

         （設計的電池室應無法嵌入或連接其它不同型號的電池）

(3)Design a battery chamber which is outgassed easily. （設計的電池室應易通氣）

(4)Design a battery chamber preventing water entering.（設計的電池室應防水）

(5)Add the feature of explosion protection to a battery chamber when it is sealed.

         （電池室密封時應增加防爆功能的裝置）

(6)Set a battery chamber apart from heat source equipment.

          （設計的電池室應遠離熱源設備）

(7)Design a battery chamber which children can not pull out easily.

          （設計的電池室小孩應不易拔出）

5. Interface and terminal （交界面和接線端）

(1)Make sufficient quality and shape for electric connection.

  （為電連接確保足夠的質量和形狀）

(2)Design an attached circuit which prevents the batteries reversed.

         （設計附屬電路以防電池顛倒）

(3)Shape the battery preventing from being reversed.（設計電池形狀以防其被顛倒）

(4)Do not solder or weld to batteries directly.（切勿直接焊接電池）