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Battery sizes according different standards
Type	IEC	ANSI	JIS	Æ/l	b	h
--	--	DD		32.9		123.5
Mono	R 20	D	UM 1	32.9		61.3
Baby	R 14	C	UM 2	26.2		49.8
Mignon	R 6	AA	UM 3	14.7		50.5
Micro	R 03	AAA	UM 4	10.5		44.5
Lady	R 1	N	UM 5	12		30.2
4.5V-Block	3 R 12	--	UM 10	62	22	67
9V Block	6 F 22	PP3	--	26.5	17.5	48.5

All sizes in mm.

All data is given for zinc –manganese dioxide cells. For alcaline cells LR is used instead of R (IEC) and AM instead of UM (JIS).

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Battery sizes