【言葉】電池のサイズ表現
MacGyver Tip: Turn a C battery into a D with quarters - Lifehacker:
You need a D battery but all you've got laying around are C cells. Since C and D batteries are both 1.5 volts (they differ only in size and energy storage), you can build a makeshift D to C "adaptor" with a few regular, conductive, George Washington quarters.
D battery とか、C cells とか、乾電池のサイズの表現ですね。
Wikipedia(日本版) で乾電池の項を調べてみると・・・
単1形 = D
単2形 = C
単3形 = AA
単4形 = AAA
単5形 = N
単6形 = AAAA
という対応になるらしい。AAとか、AAAは見かけるね。
というか、むしろ、「単」というのが気になる・・・


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