List of battery sizes

Coin cells of various diameters and thicknesses.

Coin-shaped cells are thin compared to their diameter. Polarity is usually stamped on the metal casing.

The IEC prefix "CR" denotes lithium manganese dioxide chemistry. Since LiMnO₂ cells produce 3 volts there are no widely available alternative chemistries for a lithium coin battery. The "BR" prefix indicates a round lithium/carbon monofluoride cell. See lithium battery for discussion of the different performance characteristics. One LiMnO₂ cell can replace two alkaline or silver-oxide cells.

IEC designation numbers indicate the physical dimensions of the cylindrical cell. Cells less than one centimeter in height are assigned four-digit numbers, where the first two digits are the diameter in millimeters, while the last two digits are the height in tenths of millimeters. Taller cells are assigned five-digit numbers, where the first two digits are the diameter in millimeters, followed by the last three digits indicating the height in tenths of millimeters.

All these lithium cells are rated nominally 3 volts (on-load), with open circuit voltage about 3.6 volts. Manufacturers may have their own part numbers for IEC standard size cells. The capacity listed is for a constant resistance discharge down to 2.0 volts per cell.[26]

Round button cells have heights less than their diameter. The metal can is the positive terminal, and the cap is the negative terminal.

Button cells are commonly used in electric watches, clocks, and timers. IEC batteries that meet the international IEC 60086-3 standard for watch batteries[39] carry a "W" suffix. Other uses include calculators, laser pointers, toys, LED "blinkies", and novelties.

IEC designation numbers indicate the physical dimensions of the cylindrical cell. Cells less than one centimeter in height are assigned 4-digit numbers, where the first 2 digits are the diameter in millimeters, while the last 2 digits are the height in tenths of millimeters. Taller cells are assigned 5-digit numbers, where the first 2 digits are the diameter in millimeters, followed by the last 3 digits indicating the height in tenths of millimeters.

Assorted sizes of button and coin cells, including alkaline and silver oxide chemistries. Four rectangular 9 V batteries are also shown, for size comparison. Enlarge to see the button and coin cell size code markings.

In the IEC designations, cell types with an "SR" prefix use silver oxide chemistry and provide 1.55 volts, while the "LR" prefix batteries use alkaline chemistry and provide 1.5 volts. Common alternative manufacturer's prefixes for these two types are "SG" for silver oxide and "AG" for alkaline. Since there are no "common" names beyond the AG designation, many vendors use these four designations interchangeably for the same physical sized cell.

The functional differences are that silver oxide batteries typically have 50% greater capacity than alkaline chemistry, relatively slowly declining voltage during discharge compared to alkaline types of the same size, and superior leakage resistance. The ultimate energy capacity of a silver battery may be as much as twice that of an alkaline. Also, a silver cell with a flat discharge characteristic is preferable for devices that need a steady voltage, such as photographic light meters, and devices that will not operate below a certain voltage; for example, some digital calipers, which do not work below 1.38V.

Alkaline batteries are usually cheaper than silver oxide equivalents. Inexpensive devices are sometimes supplied fitted with alkaline batteries, though they would benefit from the use of silver oxide batteries. Exhausted silver oxide cells are often recycled to recover their precious metal content, whereas depleted alkaline cells are discarded with household trash or recycled, depending on the local practices.

Mercury batteries were formerly commonly made in button sizes for watches, but due to careless disposal and the resulting mercury pollution hazard, they are no longer available. This is also a concern for users of vintage camera equipment, which typically used a mercury button battery in the exposure meter for its very steady voltage characteristic. Substitute non-mercury batteries have been produced to replace certain discontinued mercury batteries, typically by incorporating a miniature voltage regulator to simulate the flat voltage discharge characteristics of the original batteries.

In the following table, sizes are shown for the silver-oxide IEC number; types and capacity are identified as "(L)" for alkaline, "(M)" for mercury (no longer manufactured), and "(S)" for silver-oxide. Some sizes may be interchangeably used in battery holders. For example, the 189/389 cell is 3.1 mm high and was designated 1131, while the 190/390 size is 3.0 mm high and was designated 1130, but a battery holder will accept either size.

Zinc-air hearing aid batteries

Miniature zinc-air batteries are button cells that use oxygen in air as a reactant and have very high capacity for their size. Each cell needs around 1 cc of air per minute at a 10 mA discharge rate. These cells are commonly used in hearing aids. A sealing tab keeps air out of the cell in storage; a few weeks after breaking the seal the electrolyte will dry out and the battery becomes unusable, regardless of use. Nominal voltage on discharge is 1.2 V.

Lithium-ion rechargeable batteries are generally not interchangeable with primary types using different chemistry, though certain lithium primary cell sizes do have lithium-ion rechargeable equivalents. Most rechargeable cylindrical cells use a chemistry with a nominal voltage around 3.7 volts, but LiFePO
₄ cells produce only 3.2 volts.

Lithium-ion cells are made in various sizes, often assembled into packs for portable equipment.[54] Many types are also available with an internal protection circuit to prevent over-discharge and short-circuit damage. This can increase their physical length; for example, an 18650 is around 65 mm (2.56 in) long, but may be around 68 mm (2.68 in) long with an internal protection circuit. Safe and economic recharging requires a charger specified for these cells. Popular applications include laptop battery packs, electronic cigarettes, flashlights, electric vehicles, and cordless power tools.

Commonly-used designation numbers indicate the physical dimensions of the cylindrical cell, in a way similar to the system used for lithium button primary cells. The larger rechargeable cells are typically assigned five-digit numbers, where the first two digits are the (approximate) diameter in millimeters, followed by the last three digits indicating the (approximate) height in tenths of millimeters.

Names		Typical capacity (mAh)	Dimensions (mm)		Comments
Id.: ${\displaystyle 1000d+10l}$	Other common		Diameter	Length
07540		80–150	7.5	40	Used in some Electronic cigarettes.
08570		280	8.5	57	Used in some Electronic cigarettes.
10180	Lithium ion ​1⁄3 AAA	90	10	18	Sometimes called ​1⁄3 AAA. Used in tiny flashlights.
10280	Lithium ion ​2⁄3 AAA	200	10	28	Used in small flashlights.
10440[55]	Lithium ion AAA	250–350[56]	10	44	Same size as AAA cell.
14250	Lithium ion ​1⁄2 AA	300	14	25	Same size as ​1⁄2 AA cell. Used in the flashlight Lummi RAW.
14430		400–600[57]	14	43	Used in solar garden lights, used in rechargeable shavers (e.g., some Philips/Norelco).
14500[58]	Lithium-ion AA	700–1000[59][60]	14	53	Similar size as AA cell. Those with a protection circuit are slightly longer. Variations include rechargeable Kentli 1.5 V lithium AAs (2800 mAh) and non-rechargeable SAFT-brand primary cells (2600 mAh)[61][62] Used in many LED flashlights. Nominal voltage is 3.7 V.
14650[63]		940–1200[64]	14	65	Approximately ​5⁄4 the length of a AA cell.
15270[65]	RCR2	450–600	15	27	Substitute for CR2 primary lithium. Nominal voltage usually is 3 V.
16340	RCR123A	550–800[66]	16	34	Alternate substitute for CR123A primary lithium.[67] Unprotected. (16 × 36, some protected versions[68]).
16650		1600–2500[69]	16	65	Made by Sanyo and a few others, narrower version of 18650 cells.
17500[70][71]	A	830–1200[72][73]	17	50	The same size as an A cell, and 1.5 times the length of a CR123A. SAFT-brand cells (3600 mAh) are non-rechargeable.
17650		1200–1600[74]	17	65	Between the size of a 16650 and 18650.
17670[75][76]		1250–1600[77]	17	67	Twice the length of a standard CR123A.
18350		700–1200[78]	18	35	[67]
18490[79]		800–1400[80]	18	49	Slightly shorter than a 18500 cell.
18500[81][82]		1100–2040[83]	18	50	About the same length as an AA cell, but larger diameter.
18650[84][85]	168A	1500–3500[86]	18	65	This cell type is used in many laptop computer batteries, cordless power tools, certain electric cars, electric kick scooters[87], most e-bikes (bicycles driven or supported by electric motors), electronic cigarettes,[88][89] and LED flashlights. Nominal voltage is 3.7 V.[67]
20700[90]		2800–4100[91]	20	70	Introduced by Sanyo/Panasonic for use in portable power tools as higher-power and higher-capacity successor for 18650 cells.
21700[92]	21-70, 2170	3000–5000[93]	21	70	Announced by Samsung[94] and LG Chem in 2015 for use in electric bikes.[95] By January 2017, was being produced at Tesla Gigafactory 1 for the Tesla Model 3,[96] reaching an annual production rate of 1.8 billion cells annually (20 GWh per year) by mid-2018,[97] with a July 2019 Tesla forecast that they would ship 2 GWh of batteries in 2019.[98]
25500[99]		2500–5500[100]	25	50
26500			26	50	About the same dimension as a C cell.
26650[101][102]		2400–5750[103]	26	65	Popular size as[104] ANR26650 LiFePO 4 cell from A123 Systems for radio control hobby use. Also used in larger, high-powered LED flashlights and some Electronic cigarettes.
32600[105]		3000–6100[106]	32	60	About the same dimension as a D cell.
32650[107]		5000–6500[108]	32	67.7	Popular in larger LED flashlights.
38120	38120s, 38120HP	8000-10000	38	120	LiFePo4 3.2V. LiFePo4 properties: long lasting (2000+ cycles), safer, more stable, good continuous/peak discharge rates (3C/10C), less energy dense. These cylindrical cells are widely used in EVs including electric bikes, electric scooters, electric cars / hybrid electric cars, UPS batteries, storage batteries for solar power systems, starter batteries for cars & motorbikes etc. The Headway 38120HP cells are used in high discharge environments as they have very good continuous/peak discharge rates (10C/25C). Because four cells in series produces a voltage range similar to 6 cells of Lead-acids and their fire-resistant properties, they can be used to replace a 12V lead acid car battery.
38140	38140s	12000	38	140	LiFePo4 3.2V. Slightly taller version of the 38120 cells, most often used in electric bikes. Height including the screw terminals: 154mm
40152	40152s	15000	40	152	LiFePo4 3.2V. Largest cylindrical LiFePo4 cells. Height including the screw terminals: 167mm

The PP battery range

The PP (Power Pack) series was manufactured by Ever Ready in the UK (Eveready in the US). The series comprised multi-cell carbon-zinc batteries used for portable electronic devices. Most sizes are uncommon today; however, the PP3 size (and to a lesser extent PP8 and PP9, which are used in electric fencing and marine applications respectively) is readily available.[114] The PP4 was cylindrical; all the other types were rectangular. Most had snap terminals as seen on the common PP3 type. These came in two incompatible sizes, as is evident in some of the pictures below, those on larger, mostly older, battery types such as the PP9 being somewhat larger than those on the smaller batteries such as the PP3.

Image (9-Volt or E size for scale)	Names		Typical capacity (mAh)	Nominal voltage (V)	Dimensions (mm)	Comments
	PP	Other common
	PP1			6	H: 55.6 L: 65.5 W: 55.6	This battery had two snap connectors spaced 35 mm (1 3⁄8 in) apart.
	PP3	See 9-volt, above
	PP4	226 NEDA 1600 IEC 6F24		9	H: 50.0 Diameter: 25.5
	PP6	246 NEDA 1602 6135-99-628-2361 (NSN) IEC 6F50-2	850	9	H: 70.0 L: 36.0 W: 34.5	Center distance between terminals is max. 12.95 mm with both offset 7 mm nominal from the wider battery edge. Mass is 120 g.
	PP7	266 NEDA 1605 6135-99-914-1778 (NSN) IEC 6F90	2500	9	H: 63 L: 46 W: 46	Center distance between terminals is max. 19.2 mm. Mass is 200 g.
	PP8	SG8 "Fencer"		6	H: 200.8 L: 65.1 W: 51.6	This battery typically had two snap connectors; however, four connector versions are available. They were spaced 35 mm (1 3⁄8 in) apart. This type of battery is sometimes used in electric fencing applications.
	PP9	276 NEDA 1603 6135-99-945-6814 (NSN) IEC 6F100	5000	9	H: 81.0 L: 66.0 W: 52.0	This battery has two snap connectors spaced 35 mm (1 3⁄8 in) apart.
	PP10			9	H: 226.0 L: 66.0 W: 66.0	This battery had two-pin connectors. They were a single ⌀3.2 mm negative pin and a single ⌀4.0 mm positive pin spaced 13.0 mm apart.
	PP11			4.5 + 4.5	H: 91.3 L: 65.1 W: 52.4	This battery contained two independent 4.5 V batteries, and had a four-pin connector. 9 V with a center tap was available by wiring in series. There were two ⌀3.2 mm negative pins spaced 9.5 mm apart and two ⌀4.0 mm positive pins spaced 14.3 mm apart. Negative and positive pins were spaced 18.1 mm apart. It was used in some early transistor radio amplifiers with a Class B output stage, allowing the loud speaker to be connected between the amplifier output and the battery center tap.