Battery size chart
An AA battery is at most 14.5 mm across and 50.5 mm long, and a CR2032 coin cell is 20 mm across and 3.2 mm thick, on Energizer's datasheets. Pick any battery to see it at actual size.
Battery size chart: the tool
Battery size finder
Actual size
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Household battery sizes (AAA, AA, C, D)
| Size | IEC | ANSI | Voltage | Diameter (max) | Length (max) |
|---|---|---|---|---|---|
| AAA | LR03 | 24A | 1.5 V | 10.5 mm | 44.5 mm |
| AA | LR6 | 15A | 1.5 V | 14.5 mm | 50.5 mm |
| C | LR14 | 14A | 1.5 V | 26.2 mm | 50.0 mm |
| D | LR20 | 13A | 1.5 V | 34.2 mm | 61.5 mm |
| CR123A | CR17345 | 5018LC | 3 V | 17.0 mm | 34.5 mm |
9V battery size
| Size | IEC | Height | Length | Width |
|---|---|---|---|---|
| 9V (PP3) | 6LF22 or 6LR61 | 48.5 mm | 26.5 mm | 17.5 mm |
Coin and button cell size chart
For coin cells the code tells you the size: the first two digits are the diameter in mm and the last two the thickness in tenths of a mm, so a CR2032 is 20 mm across and 3.2 mm thick.
| Cell | IEC | Also sold as | Voltage | Diameter (max) | Thickness (max) |
|---|---|---|---|---|---|
| CR2032 | CR2032 | 3 V | 20.0 mm | 3.2 mm | |
| CR2025 | CR2025 | 3 V | 20.0 mm | 2.5 mm | |
| CR2016 | CR2016 | 3 V | 20.0 mm | 1.6 mm | |
| CR2450 | CR2450 | 3 V | 24.5 mm | 5.0 mm | |
| CR1632 | CR1632 | 3 V | 16.0 mm | 3.2 mm | |
| CR1220 | CR1220 | 3 V | 12.5 mm | 2.0 mm | |
| 357 / 303 | SR44 (Wikipedia: SR1154) | AG13 / SG13 (Wikipedia) | 1.55 V | 11.6 mm | 5.4 mm |
| A76 | LR44 (Wikipedia: LR1154) | AG13 (Wikipedia) | 1.5 V | 11.6 mm | 5.4 mm |
| 392 / 384 | SR41 (Wikipedia: SR736) | AG3 / LR41 alkaline equivalent (Wikipedia) | 1.55 V | 7.9 mm | 3.6 mm |
Other cells
| Size | IEC | Voltage | Diameter | Length |
|---|---|---|---|---|
| AAAA | LR8D425 | 1.5 V | 8.3 mm | 42.5 mm |
| CR2 | CR15H270 | 3.0 V | 15.6 mm | 27.0 mm |
| 18650 | none (Li-ion rechargeable) | 3.6 to 3.7 (Panasonic NCR18650B: 3.6) V | 18 mm | 65 mm |
Good to know
- Energizer datasheets print each dimension as a max and min pair (mm). Both are kept; the larger figure is the maximum allowed by the industry standard dimensions shown on the sheet.
- IEC designations encode size: for round cells the first two digits are the diameter in mm and the last two the height in tenths of a mm (CR2032 = 20 mm x 3.2 mm). This is stated by Wikipedia ('IEC designation numbers indicate the physical dimensions'); the Energizer coin datasheets agree (CR2032 max 20.00 x 3.20 mm).
- Wikipedia's table gives single nominal sizes; Energizer gives max/min. They agree on the maxima for AA (14.5 x 50.5), AAA (10.5 x 44.5), C (26.2 x 50.0), D (34.2 x 61.5), 9V height 48.5, CR123A (17.0 x 34.5), CR2032, CR2025, CR2016, CR2450, CR1220 diameter.
- CR1220 diameter: Wikipedia lists 12.5 mm; Energizer's datasheet gives 12.25 to 12.50 mm.
Related tools
Questions
What size is a CR2032 battery?
20 mm across and 3.2 mm thick (maximum, Energizer datasheet), 3 V lithium.
Are LR44 and 357 the same size?
Yes, both are 11.6 mm across and 5.4 mm thick at most on Energizer's datasheets; LR44 is alkaline (1.5 V) and 357 is silver oxide (1.55 V).
How big is an AA battery?
At most 14.5 mm in diameter and 50.5 mm long, 1.5 V for alkaline (Energizer datasheet).
Sources
- Wikipedia: List of battery sizes (checked 2026-10-05)
- Energizer: Energizer E91 (AA) product datasheet (checked 2026-10-05)
- Energizer: Energizer E92 (AAA) product datasheet (checked 2026-10-05)
- Energizer: Energizer E93 (C) product datasheet (checked 2026-10-05)
- Energizer: Energizer E95 (D) product datasheet (checked 2026-10-05)
- Energizer: Energizer 522 (9V) product datasheet (checked 2026-10-05)
- Energizer: Energizer 123 product datasheet (checked 2026-10-05)
- Energizer: Energizer CR2032 datasheet (checked 2026-10-05)
- Energizer: Energizer CR2025 datasheet (checked 2026-10-05)
- Energizer: Energizer CR2016 datasheet (checked 2026-10-05)
- Energizer: Energizer CR1632 datasheet (checked 2026-10-05)
- Energizer: Energizer CR1220 datasheet (checked 2026-10-05)
- Energizer: Energizer CR2450 datasheet (checked 2026-10-05)
- Energizer: Energizer 357/303 datasheet (checked 2026-10-05)
- Energizer: Energizer A76 datasheet (checked 2026-10-05)
- Energizer: Energizer 392/384 datasheet (checked 2026-10-05)
- Panasonic (Sanyo): NCR18650B specification (Sanyo/Panasonic), hosted by DNK Power (checked 2026-10-05)
Last checked: 5 October 2026