Battery Comparisons
15 pairs people actually look up, side by side, with the verdict worked out in both directions: a swap that is an upgrade one way round is a downgrade the other.
Coin lithium against coin lithium
Same 3 V chemistry, different case. These come down to the thickness and whether the holder still makes contact.
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CR2032 vs
CR2025
Similar size, check fit
20 × 3.2 mm against 20 × 2.5 mm
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CR2032 vs
CR2016
Similar size, check fit
20 × 3.2 mm against 20 × 1.6 mm
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CR2032 vs
CR2450
Different size
20 × 3.2 mm against 24.5 × 5 mm
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CR2032 vs
CR1632
Different size
20 × 3.2 mm against 16 × 3.2 mm
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CR2025 vs
CR2016
Similar size, check fit
20 × 2.5 mm against 20 × 1.6 mm
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CR1616 vs
CR1620
Similar size, check fit
16 × 1.6 mm against 16 × 2 mm
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CR1220 vs
CR1225
Similar size, check fit
12.5 × 2 mm against 12.5 × 2.5 mm
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CR2430 vs
CR2450
Similar size, check fit
24.5 × 3 mm against 24.5 × 5 mm
Watch and button cells, 1.5 V
Silver oxide against alkaline in the same size, and the hearing-aid cell that shares a size with both and replaces neither.
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SR44 vs
LR44
Downgrade
11.6 × 5.4 mm against 11.6 × 5.4 mm
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LR44 vs
675
Do not use
11.6 × 5.4 mm against 11.6 × 5.4 mm
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LR41 vs
SR41
Upgrade
7.9 × 3.6 mm against 7.9 × 3.6 mm
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LR1130 vs
SR1130SW
Upgrade
11.6 × 3.1 mm against 11.6 × 3.1 mm
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LR626 vs
SR626SW
Upgrade
6.8 × 2.6 mm against 6.8 × 2.6 mm
Across chemistries
Pairs where the chemistry, not the size, is the whole question.
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CR2032 vs
LR44
Not compatible
20 × 3.2 mm against 11.6 × 5.4 mm
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CR2032 vs
BR2032
Same size, other lithium chemistry
20 × 3.2 mm
Comparing button cells
- How do I tell whether two batteries are interchangeable?
- Three things have to line up: the diameter, the height and the voltage. If all three match and the chemistry is the same, it is the same cell under another code. If the voltage differs, it is not a replacement at any size.
- Are two cells with the same first two digits the same?
- No. In a four-digit code the first two digits are the diameter in whole millimetres, rounded down, and the last two are the height in tenths of a millimetre, so CR2032 and CR2016 share a 20 mm face and differ by 1.6 mm of thickness.
- Which comparison should I read?
- Find the code on your old cell in the list below. 15 pairs are covered, each with the verdict in both directions, because a swap that works one way round does not always work the other.