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common external power supply
In 2009 a European Commission initiative resulted in the specification of a common external power supply (EPS) for use with data-enabled mobile phones sold in the European Union. The "external power supply" is the AC power ''adapter'' that converts household AC electricity voltages to the much lower DC voltages needed to charge a mobile phone's internal battery. Although compliance is voluntary, a majority of the world's largest mobile phone manufacturers agreed to make their applicable mobile phones compatible with Europe's common external power supply specifications.
==Purpose==
According to the European Commission, a common external power supply / "charger" standard is desirable because,
:''"Incompatibility of chargers for mobile phones is a major environmental problem and an inconvenience for users across the EU. Currently specific chargers are sold together with specific mobile phones. A user who wants to change his/her mobile phone must usually acquire a new charger and dispose the current one, even if this is in perfect condition. This unnecessarily generates important amounts of electronic waste... Harmonising mobile phone chargers will bring significant economic and environmental benefits... Consumers will not need to buy a new charger together with every mobile phone..."''
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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