• エレクトロニクス

• 11. 基礎科学
• 12. 製造技術
• 13. 設計技術
• 21. 原材料・部品
• 22. 製造装置
• 31. 検査・測定・評価技術
• 32. トラブル解決作業
• 33. 環境
• 41. 組立技術
• 51. 製品（集積回路）
• 52. 製品（FPD）
• 53. 液晶ディスプレー
• 54. オプトエレクトロニクス機器
• 55. プラズマディスプレイパネル
• 56. 電子機器(IC カード, HDD, DVD 他 )
• 57. センサー
• 58. バイオチップ
• 61. 海外留学
• 62. 職業相談・社員募集
• 71. 旅行
• 72. 趣味・音楽・スポーツ
• 81. ソフトウェア（組込みソフトを含む）
• 91. 相互協力
• 99: その他

battery

In electronics, a battery is two or more electrochemical cells which store chemical energy and make it available as electrical energy. Common usage has evolved to include a single electrical cell in the definition. There are many types of electrochemical cells, including galvanic cells, electrolytic cells, fuel cells, flow cells and voltaic piles. A battery’s characteristics may vary due to many factors including internal chemistry, current drain and temperature.
One common division of batteries distinguishes two types: primary (disposable) and secondary (rechargeable). Primary batteries are designed to be used once only because they use up their chemicals in an effectively irreversible reaction. Secondary batteries can be recharged because the chemical reactions they use are reversible; they are recharged by running a charging current through the battery, but in an opposite direction to the discharge current. Secondary, also called rechargeable batteries can be charged and discharged many times before wearing out. After wearing out some batteries can be recycled.
>From Wikipedia: http://en.wikipedia.org/wiki/Battery_%28electricity%29

May 31, 2008 10:21 PM by bluedragon(Singapore / Malaysia)