Appliances and furniture
Dry cell battery standards (the number order is not the size order)
The numbering is not a size order: an AA cell is half a millimetre taller than a C cell, and an N cell is fatter than an AAA — all of them are 1.5 volts, so what a bigger cell buys is current and hours, not strength, and a button cell number like CR2032 is simply its diameter and height in millimetres
This drawing comes from one YAML file. No shape was moved by hand.
Notes in the source (in Japanese)
背の順は、番号の順ではない。単 3 形(R6)は 50.5mm、単 2 形(R14)は 50.0mm —— 単 3 のほうが 0.5mm 高い。単 5 形(R1)は直径 12.0mm で、単 4 形(R03)の 10.5mm より太い(背は低い)。
| 呼び名 | IEC | 直径 × 高さ |
|---|---|---|
| 単 1 形 | R20 | 34.2 × 61.5mm |
| 単 2 形 | R14 | 26.2 × 50.0mm |
| 単 3 形 | R6 | 14.5 × 50.5mm |
| 単 4 形 | R03 | 10.5 × 44.5mm |
| 単 5 形 | R1 | 12.0 × 30.2mm |
| 9V 形 | 6F22(006P) | 幅 26.5 × 厚さ 17.5 × 高さ 48.5mm(角形) |
寸法はどれも最大値で、高さは正極の突起・スナップ端子を含む総高。出典:電池工業会「乾電池使用機器の電池室・接点 安全設計ガイドブック(第 3 版)」2023-10付表 1・付表 2(JIS C 8515/IEC 60086-2 による)。取得 2026-09-29。https://www.baj.or.jp/publication/gu58lf00000010fc-att/gu58lf00000010gm.pdf
単 1〜単 5 は、どれも公称 1.5V。 大きさが変わっても電圧は同じで、変わるのは取り出せる電流と、持つ時間 —— 単 1 は「強い電池」ではなく「長い電池」。
9V 形だけ、中が違う。 1.5V の素電池 6 個を直列につないだ箱で、1.5 × 6 = 9V。円筒でないのは、6 個を詰めるため。
ボタン電池の型番は、そのまま寸法。CR2032 は「C(二酸化マンガンリチウム)・R(円形)・20(直径 20.0mm)・32(高さ 3.2mm)」——数字は型の番号ではなく、寸法そのもの。
マンガンとアルカリは、向いている使い方が違う。マンガンは小さい電流向きで、電流を止めると起電力が一時的に回復する。アルカリは大きい電流でも電圧が安定する。強い電池が、いつも良い電池ではない —— 時計やリモコンにはマンガンが合う。出典:電池工業会「乾電池について」(休み休み使うと回復し、リモコン・時計に向く)https://www.baj.or.jp/battery/qa/battery.html 取得 2026-09-29。CR の C = 二酸化マンガンリチウム(IEC 60086 の電池系記号)。IEC 60086・IEC 60086-2・JIS C 8515 の版は確かめていない。
Source (YAML)
examples/gallery/307-乾電池の規格.zumen.yaml
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