Highfields Amateur Radio Club
Glossary Appendix. copyright date

Button and Coin Battery Size Chart.

Sometimes the number on a watch (button) or coin type battery is not very well stamped and impossible to read.
This page is a chart of the sizes to assist you to find the correct battery from just the measurements.

The table is laid out in ascending diameter × thickness.
All measurements are in mm and specifications generally allow up to ±0.5 mm tolerance, although some manufacturers can't seem to keep within ±1 mm!

How to use:

  1. Measure the diameter and thickness of your battery.
    If your battery is stepped (wide at one end then thinner for the remainder) measure at the widest point.

  2. Look at the table and locate the size you noted in step 1 (allowing for tolerance), voltage and chemistry are also noted.

  3. Click on the volt/chemistry to go to the corresponding Battery Details page for full information.
    Where there is more than one type of the same size and the correct type is unknown check all the details pages for that size to ascertain correct type. (In the table cells marked as Lithium are single use, cells marked as Cobalt Titanium Lithium, Manganese Lithium, Manganese Titanium Lithium or Niobium Lithium are rechargeable).
4.8 mm Diameter × Thickness:
1.4 mm

2 V
Niobium Lithium.


3 V
Manganese Lithium.
1.6 mm

1.5 V
Manganese Titanium Lithium.
1.65 mm

1.5 V
Alkaline or Silver Oxide.
2.1 mm

3 V
Manganese Lithium.
2.15 mm

1.5 V
Alkaline or Silver Oxide.
5 mm Diameter × Thickness:
1.6 mm

1.5 V
Manganese Titanium Lithium.
5.7 mm Diameter × Thickness:
1 mm

2 V
Lithium.
5.8 mm Diameter × Thickness:
1.2 mm

1.5 V
Alkaline or Silver Oxide.


2 V
Lithium.
1.6 mm

1.5 V
Alkaline or Silver Oxide.
2.1 mm

1.5 V
Alkaline or Silver Oxide.


1.35 V
Zinc Air.
2.7 mm

1.5 V
Alkaline or Silver Oxide.
3.6 mm

1.35 V
Zinc Air.
6.8 mm Diameter × Thickness:
1 mm

1.5 V
Alkaline or Silver Oxide.


2 V
Lithium.
1.2 mm

3 V
Manganese Lithium.
1.4 mm

1.5 V
Alkaline or Silver Oxide.


3 V
Manganese Lithium.
1.6 mm

1.5 V
Manganese Titanium Lithium.


3 V
Manganese Lithium.
1.65 mm

1.5 V
Alkaline or Silver Oxide.
2.1 mm

1.5 V
Alkaline or Silver Oxide.


1.5 V
Manganese Titanium Lithium.


2 V
Niobium Lithium.


3 V
Manganese Lithium.
2.6 mm

1.5 V
Alkaline or Silver Oxide.
7.9 mm Diameter × Thickness:
1 mm

2 V
Lithium.
1.2 mm

1.5 V
Alkaline or Silver Oxide.
1.4 mm

1.5 V
Alkaline or Silver Oxide.
1.6 mm

1.5 V
Alkaline or Silver Oxide.
2.1 mm

1.5 V
Alkaline or Silver Oxide.
2.6 mm

1.5 V
Alkaline or Silver Oxide.
3.1 mm

1.5 V
Alkaline or Silver Oxide.
3.6 mm

1.5 V
Alkaline or Silver Oxide.


1.35 V
Zinc Air.
5.4 mm

1.5 V
Alkaline or Silver Oxide.


1.35 V
Zinc Air.
8.9 mm Diameter × Thickness:
3.3 mm

1.35 V
Mercury.
9 mm Diameter × Thickness:
2 mm

2.3 V
Cobalt Titanium Lithium .
9.5 mm Diameter × Thickness:
1.45 mm

1.5 V
Alkaline or Silver Oxide.
1.6 mm

1.5 V
Alkaline or Silver Oxide.
2 mm

1.5 V
Manganese Titanium Lithium.
2.1 mm

1.5 V
Alkaline or Silver Oxide.
2.6 mm

1.5 V
Alkaline or Silver Oxide.
2.7 mm

3 V
Lithium.
3.1 mm

1.5 V
Alkaline or Silver Oxide.
3.6 mm

1.5 V
Alkaline or Silver Oxide.
10 mm Diameter × Thickness:
2.5 mm

2.3 V
Cobalt Titanium Lithium .


3 V
Lithium.
11.5 mm Diameter × Thickness:
3 mm

3 V
Lithium.
11.6 mm Diameter × Thickness:
1.6 mm

1.5 V
Alkaline or Silver Oxide.
2.1 mm

1.5 V
Alkaline or Silver Oxide.
3.1 mm

1.5 V
Alkaline or Silver Oxide.
3.3 mm

1.5 V
Alkaline or Silver Oxide.
3.6 mm

1.5 V
Alkaline or Silver Oxide.
4.2 mm

1.5 V
Alkaline or Silver Oxide.
5.4 mm

1.5 V
Alkaline or Silver Oxide.


1.35 V
Zinc Air.
12 mm Diameter × Thickness:
1.6 mm

3 V
Lithium.
2 mm

3 V
Lithium.
2.5 mm

3 V
Lithium.
4 mm

3 V
Lithium.
12.5 mm Diameter × Thickness:
2 mm

3 V
Manganese Lithium.
15.5 mm Diameter × Thickness:
5.4 mm

1.5 V
Silver Oxide.
15.6 mm Diameter × Thickness:
15.6 mm

1.5 V
Alkaline or
Silver Oxide.
15.7 mm Diameter × Thickness:
6 mm

1.5 V
Alkaline or
Silver Oxide .
16 mm Diameter × Thickness:
1.2 mm

3 V
Lithium.
1.6 mm

2.3 V
Cobalt Titanium Lithium.


3 V
Lithium.
2 mm

1.5 V
Manganese Titanium Lithium.


3 V
Lithium.
3.2 mm

3 V
Lithium.
11.2 mm

1.5 V
Alkaline.
20 mm Diameter × Thickness:
1.2 mm

3 V
Lithium.
1.6 mm

3 V
Lithium.


3 V
Manganese Lithium.
2 mm

3 V
Lithium.


3 V
Manganese Lithium.
2.3 mm

3 V
Lithium.
2.5 mm

3 V
Lithium.
3.2 mm

3 V
Lithium.
4 mm

3 V
Lithium.
23 mm Diameter × Thickness:
2 mm

3 V
Lithium.


3 V
Manganese Lithium.
2.5 mm

3 V
Lithium.
3 mm

3 V
Lithium.


3 V
Manganese Lithium.
3.5 mm

3 V
Lithium.
5.4 mm

3 V
Lithium.
23.2 mm Diameter × Thickness:
6.1 mm

1.5 V
Alkaline
or Silver Oxide.
24.5 mm Diameter × Thickness:
1.2 mm

3 V
Lithium.
3 mm

3 V
Lithium.


3 V
Manganese Lithium.
5 mm

3 V
Lithium.
7.7 mm

3 V
Lithium.
30 mm Diameter × Thickness:
3.2 mm

3 V
Lithium.

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