| 摘要 |
PURPOSE: A battery pack is provided to reduce manufacturing cost by simplifying process, and to reduce defective product by omitting unnecessary processes. CONSTITUTION: A battery pack comprises a plurality of electroluminescent devices, switch for operating the electroluminescent devices, a case, a support part(21) fixed to an inner side of the case, an elastic connection part(30) extended from one side of the support part, a button formed on the end part of the elastic connecting part; and an observation part(50), which is fixed between the support part and the case, passing light through emitted from the electroluminescent device. In the case, a button hole for exposing the button, and an observation hole for exposing light passed through the observation part are formed.
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