Button and coin battery sizes
Which coin cell fits? CoinCellChart answers it from the source: battery makers’ datasheets for sizes and equivalents, carmakers’ owner’s manuals for key fobs. Every value links to where it came from and when we checked it, and where sources disagree you see both.
Sizes at a glance
16 cells, largest first. Diameter × height and nominal voltage as printed on each maker’s datasheet (checked 2026-09-26, 2026-09-27, 2026-10-04); tolerances, capacity and every source are on the equivalent chart.
Button and coin cell equivalents
16 cells, sizes and codes from battery makers’ datasheets.
Equivalent chart
LR44 equivalent
LR41 equivalent
LR1130 equivalent
SR626SW equivalent
SR621SW equivalent
CR2450 equivalent
CR1632 equivalent
SR521SW equivalent
SR920SW equivalent
SR927SW equivalent
CR2032 vs CR2025 vs CR2016
CR2025 or CR2032 in a key fob?
Key fob batteries
96 key and model-year rows for 10 makes, from owner’s manuals and Panasonic’s key fob finder.