DIN 4165 connector

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Similar in concept to an automotive cigar lighter, the DIN 4165 connector is shorter and smaller, and found most frequently on motorcycles (most frequently BMW cycles). This is the reason why it's often called BMW Accessory plug. Also it's quite often called Powerlet connector because of the firm name that produces them.

At least one manufacturer sells a plug that combines a cigar lighter plug and a powerlet, in much the same way that combination auto/airplane notebook computer power adapters combine a cigar lighter plug and an Airinc 628/Empower plug.