由於資訊化社會的發展，手機、數位相機、MP3…等電子產品倍廣泛使用，亦使得充電器充斥，種類繁多的充電器讓人傷痛腦筋，本研究將設計製作一台低成本又可讓多數手機電池共用的充電座，利用可旋轉鈕調整裝置，調整充電器電壓至各廠牌所規定的電壓值以進行充電，由於目前多數人手邊都有各式的充電器，如果能有一個共用式的充電器，不僅可以提高充電效能也可方便攜帶，節省空間，使人們不必再為繁雜的電線與各種規格的充電器傷腦筋，帶給人們更多的便利。

Due to the development of informationiza- tion, the electronic products are widely being used, such as cellphone, digital cameras and MP3 players. Nowadays, there are hundreds of different cellphone batteries for varied brands. This research is aimed at designing a low-cost charger which can also be applied in various types of betteries by using an installation of rotatable knob to adjust the chager in different voltages. The versatile chargers will replace different types of chargers in order to save money for buying various chargers. Finally, it will bring lots of benefits to people who will no longer carry the complexity of electro wires and chargers.