Batteries - button cell equivalents

This is a list of common button cells, their equivalents, physical dimensions in millimetres, nominal open-circuit voltage and their mass in grams. Please note that battery voltage and capacity depends on formulation. In the IEC battery designation system, the first letter of the battery code defines the formulation. Please see Battery formulation – IEC codes for more information. This letter is denoted by the * character in this table.

Master IEC designation	Alternate IEC designation	G designation	Renata designation(s)	Other common equivalent	Other common equivalent	Diameter (mm)	Height (mm)	Representative nominal voltage	Representative capacity (mAh)	Representative mass (g)
*R63	*R521	G0	379	319		5.8	2.2	1.50	10	0.3
*R60	*R621	G1	364			6.8	2.2	1.50	12	0.34
*R59	*R726	G2	396,397	196		7.9	2.6	1.50	23	0.5
*R41	*R736	G3	384,392	41		7.9	3.6	1.50	30	0.7
*R66	*R626	G4	376,377	626	177	6.8	2.6	1.50	20	0.4
*R48	*R754	G5	393	309		7.9	5.4	1.50	58	1.1
*R69	*R921	G6	370,371	920	CX921	9.5	2.1	1.50
*R57	*R927	G7	395,399	926	CX926	9.5	2.7	1.50
*R45	*R936	G9	380,394	936	CX936	9.5	3.6	1.50
*R55	*R1121	G8	381,391	1120		11.6	2.1	1.50	35	0.9
*R54	*R1130	G10	389,390	1130		11.6	3.1	1.50	64	1.3
*R58	*R721	G11	361,362	721	CX721	7.9	2.1	1.50
*R43	*R1142	G12	301,386	43		11.6	4.2	1.50	110	1.8
*R44	*R1154	G13	303,357	44	A76	11.6	5.4	1.50	150	2.7
*R1220			CR1220	DL1220	ECR1220	12.5	2.0	3.00	35	0.9
*R1616			CR1616	DL1616	ECR1616	16.0	1.6	3.00	55	1.0
*R1620			CR1620	DL1620	ECR1620	16.0	2.0	3.00	75	1.3
*R2016			CR2016	DL2016	ECR2016	20.0	1.6	3.00	90	1.6
*R2025			CR2025	DL2025	ECR2025	20.0	2.5	3.00	165	2.3
*R2032			CR2032	DL2032	ECR2032	20.0	3.2	3.00	225	2.8
*R2430			CR2430			24.5	3.0	3.00	290
*R2450			CR2450			24.5	5.0	3.00	620	6.2

Please see http://en.wikipedia.org/wiki/Watch_battery for more info about button cell voltages. Header image by Wipsenade at English Wikipedia, CC BY 3.0, https://commons.wikimedia.org/w/index.php?curid=12605180

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