List of battery sizes

4.5-volt, D, C, AA, AAA, AAAA, A23, 9-volt, CR2032 and LR44 batteries

This article lists the sizes, shapes, and general characteristics of some common primary and secondary battery types in household and light industrial use.

Historically the term "battery" referred to a collection of electrochemical cells connected in series, however in modern times the term has come to refer to any collection of cells (or single cell) packaged in a container with external connections provided to power electrical devices, leading to the variety of standardized form factors available today.

The long history of disposable dry cells means that many different manufacturer-specific and national standards were used to designate sizes, long before international standards were agreed upon. Technical standards for battery sizes and types are published by standards organizations such as International Electrotechnical Commission (IEC) and American National Standards Institute (ANSI). Many popular sizes are still referred to by old standard or manufacturer designations, and some non-systematic designations have been included in current international standards due to wide use.

The complete nomenclature for the battery will fully specify the size, chemistry, terminal arrangements and special characteristics of a battery. The same physically interchangeable cell size or battery size may have widely different characteristics; physical interchangeability is not the sole factor in substitution of batteries.

Standardization

Main article: Battery nomenclature

The current IEC standards for portable primary (non-rechargeable) batteries bear the 60086 number. The relevant US standards are the ANSI C18 series, which are developed by a committee of the US National Electrical Manufacturers Association (NEMA).

Both standards have several parts covering general principles, physical specifications and safety. Designations by IEC and ANSI standards do not entirely agree, although harmonization is in progress. Manufacturers further have their own systematic identification of cell types, so cross-reference tables are useful to identify equivalent types from different manufacturers.

Lead-acid automotive starting, lighting and ignition batteries have been standardized according to IEC standard 60095 and in North America by standards published by BCI.

Non-standard brand-specific names

Manufacturers may assign proprietary names and numbers to their batteries, disregarding common, colloquial, IEC, and ANSI naming conventions (see LR44 battery as an example). Often this is done to steer customers towards a specific brand, and away from competing or generic brands, by obfuscating the common name. For example, if a remote control needs a new battery and the battery compartment has the label, "Replace with CX472 type battery," many customers will buy that specific brand, not realizing that this is simply a brand name for a common type of battery. For example, British standard "U" series batteries were often sold under manufacturer prefixes such as "C", "SP", "HP", etc.; Ever Ready sold "U2" (D) batteries as "SP2" (standard-duty zinc carbon) and "HP2" (heavy duty zinc chloride).

On the other hand, with obscure battery types the designation assigned by a specific brand will sometimes become the most common name for that battery type, as other manufacturers copy or modify the name so that customers recognize it.

Battery chemistry

The terminal voltage of a battery cell depends on the chemicals and materials used in its construction, and not on its physical size. For example, primary (non-rechargeable) alkaline batteries have a nominal voltage of 1.5 volts. Rechargeable NiCd (nickel cadmium) and NiMH (nickel metal hydride) typically output 1.25 volts per cell. Devices intended for use with primary batteries may not operate properly with these cells, given the reduction in voltage.

Dry Leclanche (carbon-zinc), alkaline and lithium batteries are the most common modern types. Mercury batteries had stable cell terminal voltages around 1.35 volts. From the late 1940s until the mid-1990s, mercury batteries were made in many consumer and industrial sizes. They are no longer available since careless disposal can release toxic mercury into the environment. They have been replaced in some applications by zinc-air batteries, which also produce 1.35 volts.

The full battery designation identifies not only the size, shape and terminal layout of the battery but also the chemistry (and therefore the voltage per cell) and the number of cells in the battery. For example, a CR123 battery is always Li-MnO₂ ('lithium') chemistry, in addition to its unique size.

The following tables give the common battery chemistries for the current common sizes of batteries. See Battery Chemistries for a list of other electrochemical systems.

Physical interchangeability

Cylindrical cells typically have a positive terminal nub at one end, and a flat negative terminal at the other. A cell with a nub on the positive terminal is called a button-top, and a cell without a positive nub is called a flat-top. Two different cells of the same nominal size, e.g. two 18650 cells, may have different diameter buttons if made by different manufacturers, and this can lead to incompatibility with devices. Flat-top cells cannot be used in series without modification or soldering into position, because the flat positive terminal of one cell cannot contact with the next cell's negative terminal. Rarely however, a manufacturer may include tiny bumps on the negative terminal, so flat-tops can be used in series.

It is important to check the battery contacts in a device before attempting to install cells, because some will not work with flat-tops or with button-tops whose buttons are the wrong diameter. Some devices have a small bump or spring where the positive terminal of the cell connects, and this allows the use of either button- or flat-top cells. Other devices have a flat area that can only be contacted by a button-top. To prevent damage if a cell is inserted backwards, some devices have a raised plastic ring around the positive contact. This stops the flat negative end of a cell from connecting accidentally, but also stops the positive end of a flat-top or of a button-top with too large button from connecting.

Cylindrical batteries

These are round batteries with height longer than their diameter. In zinc-carbon or alkaline types they produce around 1.5V per cell when fresh. Other types produce other voltages per package, as low as 1.2V for rechargeable nickel-cadmium, up 12V for the A23 alkaline battery, a stack of 8 cells in the same overall format. This package has a positive nub terminal at the cap of the cell, and the negative terminal at the bottom of the can; the side of the can is not used as a terminal. The polarity of the can side may even change, according to their chemistry and whether the can is sealed from the positive or negative end.

Names				Typical capacity (mAh)	Nominal voltage (V)	Size, dia. × h. (mm)	Comments
Most common	Other common	IEC	ANSI
4/5AA	FLYCO Ni-Cd, Ni-Mh			600–1500	1.2	14.0 × 40.0	Same diameter as AA battery, used in small electronics, including electric shaver.
1⁄2AA	SAFT LS14250 Tadiran TL5101 UL142502P	CR14250 (Li‑MnO2) ER14250 (Li‑SOCl2)		850–1200	3 (Li‑SOCl2) 3.6 (Li‑MnO2)	14.0 × 25.0 (nom) 14.5 x 25.0 (max)	Same diameter as AA battery, used in small electronics, including pulse oximeters, as well as use in some computer models (such as most pre-Intel Macintosh models and some older IBM PC compatibles) as the CMOS battery. Also used in US military MILES gear and DAGR.
AAAA	MX2500 Mini UM 6 (JIS)	LR8D425 (alkaline) LR61	25A (alkaline)	625 (alkaline)	1.5	8.3 × 42.5	Sometimes used in pen flashlights, laser pointers, powered styluses, calculators, fishing lures, or electronic glucose meters.
AAA	U16 or HP16 (In the UK) Micro Microlight MN2400 MX2400 MV2400 Type 286 (Soviet Union/Russia) UM 4 (JIS) 単4 #7 (China) 6135-99-117-3143 (NSN)	LR03 (alkaline) R03 (carbon–zinc) FR03 (Li–FeS2) HR03 (NiMH) KR03 (NiCd) ZR03 (NiOOH)	24A (alkaline) 24D (carbon–zinc) 24LF (Li–FeS2)	1200 (alkaline) 540 (carbon–zinc) 800–1000 (NiMH) 500 (NiZn)	1.5	10.5 × 44.5 (0.41 × 1.75)	Introduced 1911, but added to ANSI standard in 1959 Used in many household electronic devices
AA	U12 or HP7 (In the UK) Pencil-sized Penlight Mignon MN1500 MX1500 MV1500 Type 316 (Soviet Union/Russia) UM 3 (JIS) 単3 #5 (China) 6135-99-052-0009 (NSN)(carbon-zinc) 6135-99-195-6708 (NSN)(alkaline)	LR6 (alkaline) R6 (carbon–zinc) FR6 (Li–FeS2) HR6 (NiMH) KR6 (NiCd) ZR6 (NiOOH)	15A (alkaline) 15D (carbon–zinc) 15LF (Li–FeS2) 1.2H2 (NiMH) 1.2K2 (NiCd)	2700 (alkaline) 1100 (carbon–zinc) 3000 (Li–FeS2) 1700–2700 (NiMH) 600–1000 (NiCd) 1500 (NiZn)	1.5	14.5 × 50.5 (0.57 × 1.99)	Introduced 1907, but added to ANSI standard sizes in 1947. Note: 14500 Lithium Batteries are not AA as they are 3.7 V. Used in many household electronic devices
A		R23 (carbon‑zinc) LR23 (alkaline)			1.5	17 × 50	More common as a NiCd or NiMH cell size than a primary size, popular in older laptop batteries and hobby battery packs. Various fractional sizes are also available; e.g., 2⁄3 A and 4⁄5 A.
B	U10 (UK) 336 (Russian Federation)	R12 (carbon‑zinc) LR12 (alkaline)		8350 (alkaline)	1.5	21.5 × 60	Most commonly found within a European 4.5 volt lantern battery. Historically available in UK as a 2 cell battery type No 8 for bijou size torches. Not to be confused with the vacuum tube B battery.
C	U11 or HP11 (In the UK) MN1400 MX1400 Baby Type 343 (Soviet Union/Russia) BA-42 (US Military Spec WWII–1980s) UM 2 (JIS) 単2 #2 (China) 6135-99-199-4779 (NSN)(carbon-zinc) 6135-99-117-3212 (NSN)(alkaline)	LR14 (alkaline) R14 (carbon–zinc) HR14 (NiMH) KR14 (NiCd) ZR14 (NiOOH)	14A (alkaline) 14D (carbon–zinc)	8000 (alkaline) 3800 (carbon–zinc) 4500–6000 (NiMH)	1.5	26.2 × 50 (1.03 × 1.97)	Can be replaced with AA cell using plastic "sabot" (size adaptor), with proportional loss of capacity.
Sub-C	Type 323 (Soviet Union/ Russian Federation)	KR22C429 (NiCd) HR22C429 (NiMH)		1200–2400 (NiCd) 1800–5000 (NiMH)	1.2	22.2 × 42.9	A common size for cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs. 1⁄2-, 4⁄5- and 5⁄4-sub-C sizes (differing in length) are also available.
D	U2 or HP2 (UK) Flashlight Battery MN1300 MX1300 Mono Goliath Type 373 (Soviet Union/Russia) BA-30 (US Military Spec WWII–1980s) UM 1 (JIS) 単1 #1 (China) 6135-99-464-1938 (NSN)(carbon-zinc) 6135-99-109-9428 (NSN)(alkaline)	LR20 (alkaline) R20 (carbon–zinc) HR20 (NiMH) KR20 (Ni-Cd) ZR20 (NiOOH)	13A (alkaline) 13D (carbon–zinc)	12000 (alkaline) 8000 (carbon–zinc) 2200–11000 (NiMH) 2000-5500 (NiCd)	1.5	34.2 × 61.5 (1.35 × 2.42)	Introduced 1898 as the first flashlight battery.
F		R25 (carbon‑zinc) LR25 (alkaline)	60	10500 (carbon‑zinc) 26000 (alkaline)	1.5	33 × 91	Four F cells are often found within 6 volt rectangular lantern batteries.
N	Lady MN9100 UM-5 (JIS) E90 6135-99-661-4958 (NSN)	LR1 (alkaline) R1 (carbon‑zinc) HR1 (NiMH) KR1 (NiCd)	910A (alkaline) 910D (carbon‑zinc)	800–1000 (alkaline) 400 (carbon‑zinc) 350–500 (NiMH)	1.5	12 × 30.2	Rechargeable nickel–cadmium and nickel–metal hydride are far less common than other rechargeable sizes. Mercury batteries of the same dimensions are no longer manufactured.
A23	V23GA 23A 23AE MN21 L1028 8LR23 LRV08 LR23A A23S	8LR932 (alkaline)	1811A (alkaline)	55 (alkaline)	012	10.3 × 28.5	Used in small RF devices such as key fob-style garage door openers, wireless doorbells, and keyless entry systems where only infrequent pulse current is used. Usually contains a stack of eight LR932 button cells shrink wrapped together.
A27	GP27A MN27 L828 27A V27A A27BP G27A	8LR732 (alkaline)		22 (alkaline)	012	8.0 × 28.2	Used in small RF devices such as car alarm remote controls. Can also be found in some cigarette lighters. May be made of eight LR632 cells.
BA5800	BA5800/U (Li‑SOCl2) BA5800A/U (Li‑SO2)			7500 (Li‑SO2)	Li‑SO2: 05.3	35.5 × 128.5	Has both terminals at the same end and is roughly the size of two stacked D cells. Used in military hand-held devices such as the PLGR.
Duplex	Ever Ready No. 8	2R10			03	21.8 × 74.6	Internally contains two 1.5 V cells hence the nickname 'Duplex'. In Switzerland as of 2008, 2R10 batteries accounted for 0.003% of primary battery sales.
4SR44	PX28A A544 K28A V34PX	4LR44 (alkaline)		110–150 (alkaline) 170‑200 (silver‑oxide)	Alkaline: 06.2 Silver‑oxide: 06.5	13 × 25.2	Used in film cameras, blood glucose meters, medical instruments, dog training devices. Often simply a stack of four SR44 (LR44) button cells shrink wrapped together.

Rectangular batteries

Names				Typical capacity (mAh)	Nominal voltage (V)	Terminal layout	Dimensions (mm)	Comments
Most Common	Other Common	IEC	ANSI
4.5-volt	Pocketable battery 4.5 V MN1203 Type 3336 (Soviet Union/Russia)	3LR12 (alkaline) 3R12 (carbon‑zinc)	3LR12 (alkaline) 3R12 (carbon‑zinc)	6100 (alkaline) 1200 (carbon‑zinc)	Alkaline carbon‑zinc (3 cells): 4.5	Two 6–7 mm wide metal strips +: shorter strip −: longer strip	H: 67 L: 62 W: 22	This battery, introduced in 1901, was very common in continental Europe until the 1970s. In Switzerland as of 2008, 4.5-volt batteries account for only 1% of primary battery sales.
9-volt or E	PP3 Radio battery Smoke alarm battery Square battery Transistor battery 006P MN1604 Type Krona (Soviet Union/Russia)	6LR61 (alkaline) 6F22 (carbon‑zinc) 6KR61 (NiCd) 6HR61 (NiMH)	1604A (alkaline) 1604D (carbon‑zinc) 1604LC (lithium) 7.2H5 (NiMH) 11604 (NiCd) 1604M (mercury, obsolete)	565 (alkaline) 400 (carbon‑zinc) 1,200 (lithium) 175–300 (NiMH) 120 (NiCd) 500 (lithium polymer rechargeable) 580 (mercury, obsolete)	Alkaline carbon‑zinc (6 cells): 9 Lithium (3 cells): 9 NiMH / NiCd (6, 7 or 8 cells): 7.2, 8.4 or 9.6	Both on same end +: male clasp −: female clasp	H: 48.5 L: 26.5 W: 17.5	Added to ANSI standard in 1959. Often contains six LR61 cells, which are similar to and often interchangeable with AAAA cells.
6-volt Lantern (Spring)	Lantern 6 V Spring top MN908 996 or PJ996 Energizer 529	4LR25Y (alkaline) 4R25 (carbon‑zinc)	908A (alkaline) 908D (carbon‑zinc)	26,000 (alkaline) 10,500 (carbon‑zinc)	Alkaline carbon‑zinc (4 cells): 6	Springs, top +: corner spring −: center spring	H: 115 L: 68.2 W: 68.2	Spring terminals. Usually contains four F cells.
Lantern (Screw)	Lantern 6 V Screw Top 6135-99-645-6443 (NSN)	4R25X (carbon‑zinc) 4LR25X (alkaline)	915 (carbon‑zinc) 915A (alkaline)	10,500 (carbon‑zinc) 26,000 (alkaline)	6	Screw posts on top of battery. +: corner, −: center. Maximum diameter of the posts is 3.5 mm.	H: 109.5 L: 66.7 W: 66.7	Used in locations susceptible to high vibration/shock where connectors may be knocked off the terminals.
Lantern (Big)	918 R25-2 Big Lantern Double Lantern MN918 Energizer 521	4R25-2 (carbon‑zinc) 4LR25-2 (alkaline)	918A	22,000 (carbon‑zinc) 52,000 (alkaline)	6	Screw posts on top of battery. Labelled only, no physical keying for polarity. Maximum diameter of the posts is 4.2 mm spaced 75 mm apart.	H: 125.4 L: 132.5 W: 73	Used in locations susceptible to high vibration/shock where connectors may be knocked off the terminals.
J	7K67	4LR61 (alkaline)	1412A (alkaline)	625 (alkaline)	6	6.5 mm² flat contacts, +: chamfered corner, −: top side	H: 48.5 L: 35.6 W: 9.18	Typically used in applications where the device in question must be flat, or where one should not be able to insert the battery in reverse polarity, such as a blood glucose meter or blood pressure cuff. Also good for elderly persons, due to its large size. Often contains four LR61 cells, which are similar to and often interchangeable with AAAA cells.

Camera batteries

As well as other types, digital and film cameras often use specialized primary batteries to produce a compact product. Flashlights and portable electronic devices may also use these types.

Image (AA size for scale)	Names				Typical Capacity (mAh)	Nominal Voltage (V)	Shape	Terminal Layout	Dimensions	Comments
	Most Common	Other Common	IEC	ANSI
	CR123A	Camera battery 2⁄3A 123 CR123 17345 16340 CR-123A 6135-99-851-1379 (NSN)	CR17345 (lithium)	5018LC (lithium)	1500 (lithium) 700 (Li–ion rechargeable)	3 (lithium) 3.6 (Li-ion)	Cylinder	+: Nub cylinder end −: Flat opposite end	H: 34.5 mm Ø: 17 mm	A lithium primary battery, not interchangeable with zinc types. A rechargeable lithium-polymer version is available in the same size and is interchangeable in some uses. According to consumer packaging, replaces (BR)2⁄3A. In Switzerland as of 2008, these batteries accounted for 16% of lithium camera battery sales. Used in flashlights.
	CR2	15270 (Li-ion rechargeable, 800 mA) 15266 (Li-ion, 600 mA) 6135-99-606-3982 (NSN)	CR15H270	5046LC	750 (lithium) 600/800 (Li-ion types)	3 (lithium) 3.6 (Li-ion)	Cylinder	+: Nub cylinder end −: Flat opposite end	H: 27 mm Ø: 15.6 mm	Standard discharge current: 10 mA A common battery type in cameras and photographic equipment. In Switzerland as of 2008, these batteries accounted for 6% of lithium camera battery sales.
	2CR5	EL2CR5 DL245 RL2CR5 6135-99-577-2940 (NSN)	2CR5	5032LC	1500	6	Double cylinder. Keyed.	Both on one end. Terminal center spacing 16 mm.	H: 45 mm L: 34 mm W: 17 mm	Commonly used in film and digital cameras. Shaped so that it can be inserted into a battery compartment only one way. In Switzerland as of 2008, these batteries accounted for 1% of lithium camera battery sales.
	CR-P2	BR-P2 223A CR17-33 5024LC	CR-P2	5024LC	1500	6	Double cylinder. Keyed.	Both on one end. Terminal diameter: 8.7 mm Terminal center spacing: 16.8 mm.	H: 36 mm L: 35 mm W: 19.5 mm	Shaped so that it can be inserted into a battery compartment only one way. Typical mass: 37 g. They contain two 3 V batteries exchangeable with CR123 batteries.
	CR-V3	CRV3 RCR-V3 (Li-ion)		5047LC 5047LF (primary)	3000 (lithium) 1300 (Li-ion)	3 (lithium) 3.6 (Li-ion)	Double cylinder flat pack. Keyed.	Both on one end	H: 52.20 mm L: 28.05 mm W: 14.15 mm	The same size as two R6 (AA) cells side by side. A rechargeable type is also made in this size. May be used in some devices not explicitly designed for CR-V3, especially digital cameras.
	CP1	DLCP1 DL-CP1C	CP3553		2300	3	Prismatic.	Both on one end.	H: 57 mm L: 35 mm W: 7 mm	Shaped so that it can be inserted into a battery compartment only one way. No longer made by Duracell, nor listed in its official website, but still stocked as of 28 February 2017 by some re-sellers. Typical mass: 1.1 oz (31 g). Disposable equivalent of the Nikon EN-EL5 Li-ion rechargeable camera battery.

Button cells - coin, watch

See also: Button cell

Lithium cells

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 Li-MnO₂ 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 Li-MnO₂ 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.

Names		Typical Capacity (mAh)	Standard Discharge Current (mA)	Dimensions d × h (mm)	Comments
IEC	ANSI
CR927		30		9.5 × 2.7	Used extensively in blinkies. Also used in some LEGO toys.
CR1025	5033LC	30	0.1	10 × 2.5
CR1130		70		11.5 × 3.0	A rare battery, sometimes used in car security (car alarm/keyfob batteries), organizer (backup battery for PDA such as Psion etc.), glucometer equipment, and some pedometers. Also known as DL1130, BR1130, KL1130, L1130, ECR1130, KCR1130, E-CR1130, KECR1130
CR1216	5034LC	25	0.1	12.5 × 1.6	Used in some lighted watches and some LED decorator lights (electronic tea candles).
CR1220	5012LC	35–40	0.1 (CR) 0.03 (BR)	12.5 × 2.0	Used in keychain LED flashlights.
CR1225	5020LC	50	0.2	12.5 × 2.5	Maximum discharge current: 1 mA. Maximum pulse discharge current: 5 mA.
CR1616		50–55	0.1	16 × 1.6	Used in automobile key remotes and in Game Boy cartridges (for powering the RAM for saved games).
CR1620	5009LC	75–78	0.1	16 × 2.0	Used in automobile key remotes and early digital watches.
CR1632		140 (CR) 120 (BR)	0.1 (CR) 0.03 (BR)	16 × 3.2	Used in automobile key remotes; e.g., Toyota Prius 2012.
CR2012		55	0.1	20 × 1.2
CR2016	5000LC	90	0.1 (CR) 0.03 (BR)	20 × 1.6	Frequently used in digital watches. Often used in pairs instead of CR2032 for devices that require more than 3V, like blue/white LED flashlights.
CR2020		115–125		20 × 2
CR2025	5003LC	160–165	0.2	20 × 2.5	Frequently used in digital watches and automobile remotes.
CR2032	5004LC	225 (CR) 190 (BR)	0.2 (CR) 0.03 (BR)	20 × 3.2	Maximum discharge current: 3 mA. Maximum pulse discharge current: 15 mA. This is also the most common lithium cell. Commonly used on computer motherboards as nonvolatile BIOS memory and real-time clock (RTC) backup batteries. Weighs around 2.9 g.
CR2040		280		20 × 4.0	Used in Skytronic PRO Audible Altimeter but also flow meters and organizers (as a memory backup battery). Has become obsolete and hard to find. Other names are BR2040, DL2040, ECR2040, E-CR2040, KCR2040, KECR2040, KL2040, L2040, L24.
CR2320		110–175		23 × 2
CR2325		165–210		23 × 2.5	The most common battery size in Soviet/Russian electronic watches, calculators and remote controls.
CR2330		265 (CR) 255 (BR)	0.2 (CR) 0.03 (BR)	23 × 3.0
BR2335		165 (BR)		23 × 3.5
CR2354		560	0.2	23 × 5.4
CR2412		100	0.2	24.5 × 1.2
CR2430	5011LC	270–290		24.5 × 3.0
CR2450	5029LC	610–620		24.5 × 5.0	Portable devices requiring high current (3.0 mA) and long shelf life (up to 10 years)
CR2477		1000	0.2	24.5 × 7.7	Has the highest capacity of lithium button cell batteries.
CR3032		500–560 (CR) 500 (BR)	0.1-0.2 (CR) 0.03 (BR)	30.0 × 3.2	Continuous discharge current taken from Panasonic Catalog.
CR11108		160		11.6 × 10.8	Also called CR1/3N because it is 1⁄3rd the height of an alkaline N cell, and a stack of three of them will form a battery with the same dimensions as an N cell, but with 9V terminal voltage. Such 9V batteries in a single package do exist but are rare and only usually found in specialist applications; they can be referred to as 3CR1/3N. However 2CR1/3N, a 6V battery consisting internally of a stack of two CR1/3N and standardized by ANSI as 1406LC and by IEC as 2CR13252 (although some datasheets state it as 2CR11108 instead), is sold by Duracell (PX28L), Energizer (L544, now obsolete), and others. A CR1/3N was also used by photographers instead of two LR44 batteries, in cameras such as the Nikon EM or FE2.

Silver oxide and alkaline cells

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 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 9V 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, although 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. In some cases, sizes that originally were considered distinct are now interchangeable. 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 these sizes are now considered equivalent.

Names				Typical Capacity (mAh)	Dimensions dia × h (mm)	Comments (L) = alkaline (S) = silver-oxide
Most Common	Other Common	IEC	ANSI
SR41	AG3/SG3/G3-A LR41 192/384/392 6135-99-949-0402 (NSN)(S) QR41	LR736 (L) SR736 (S)	1135SO (S) 1134SO (S)	25–32 (L) 38–45 (S)	7.9 × 3.6
SR42	242 344/350 387S	SR1136 (KOH electrolyte, 344/350) SR1136S (NaOH electrolyte, 387S)	1139SO	63 (387S) 100 (344/350)	11.6 × 3.6
SR43	AG12/SG12 LR43 L1142 186/301/386 6135-99-547-0573 (NSN)(S)	LR1142 (L) SR1142 (S)	1133SO (S) 1132SO (S)	80 (L) 120–125 (S)	11.6 × 4.2
SR44	AG13/SG13 LR44/LR154 6135-99-792-8475 (NSN)(alkaline) 6135-99-651-3240 (NSN)(S) A76/S76/EPX76 157/303/357 1128MP, 208-904, A-76, A613, AG14, AG-14, CA18, CA19, CR44, D76A, G13A, G13-A, GDA76, GP76A, GPA7, GPA75, GPA76, GPS76A, KA, KA76, AG76, L1154, L1154C, L1154F, L1154G, L1154H, LR44G, LR44GD, LR44H, MS76H, PX76A, PX675A, RPX675, RW82, SB-F9, V13G, 357A	LR1154 (L) SR1154 (S)	1166A (L) 1107SO (S) 1131SOP (S)	110–150 (L) 170–200 (S)	11.6 × 5.4	Typical internal resistance: 8 ohms
SR45	AG9/SG9 LR45 194/394 6135-99-782-4675 (NSN)(S)	LR936 (L) SR936 (S)		48 (L) 55–70 (S)	9.5 × 3.6
SR48	AG5/SG5 LR48 L750 193/309/393	LR754 (L) SR754 (S)	1136SO (S) 1137SO (S)	52 (L) 70 (S)	7.9 × 5.4
LR52	A640PX, E640, EN640A, EPX640A, MR52, PX640, PX640A	LR52 (L) MR52 (M)	1126A (L)	335 (L)	15.8 × 11.1	1.5V (L), 1.35V (M) No longer made by Duracell or Energizer, but still stocked by some re-sellers as of 26 February 2017
SR54	AG10/SG10/G10-A LR54 189/387/389/390 LR1130/SR1130 6135-99-796-0471 (NSN)(S)	LR1131 (L) SR1131 (S)	1138SO (S)	44–68 (L) 80–86 (S)	11.6 × 3.1
SR55	AG8/SG8 LR55 191/381/391 LR1120/SR1120	LR1121 (L) SR1121 (S)	1160SO (S)	40–42 (L) 55–67 (S)	11.6 × 2.1
	365, 366, S16, 608	SR1116SW	1177SO	28-40	11.6 × 1.65	1.55V
SR56		SR1126			11.6 × 2.6	Listed in IEC 60086-2:2001, but apparently no longer manufactured by any major company.
SR57	AG7/SG7 LR57 195 395(low-drain)/399(high-drain) LR927/SR927 SR927W/SR927SW/GR927 6135-99-796-0471 (NSN)(S)	LR926 (L) SR926 (S)	1165SO (S)	46 (L) 55–67 (S)	9.5 × 2.6
SR58	AG11/SG11 LR58 162/361/362	LR721 (L) SR721 (S)	1158SO (S)	18–25 (L) 33–36 (S)	7.9 × 2.1
SR59	AG2/SG2 LR59 196/396/397	LR726 (L) SR726 (S)	1163SO (S)	26 (L) 30 (S)	7.9 × 2.6
SR60	AG1/SG1 LR60 164/364	LR621 (L) SR621 (S)	1175SO (S)	13 (L) 20 (S)	6.8 × 2.1
SR62	SR516SW 317	LR516 (L) SR516 (S)		11 (S)	5.8 × 1.6
SR63	AG0/SG0 LR63 379	LR521 (L) SR521 (S)		10 (L) 18 (S)	5.8 × 2.1
SR64	LR64 319	LR527 (L) SR527 (S)		12 (L) 20 (S)	5.8 × 2.7
SR65	SR616SW 321	LR65 Varta V321			6.8 × 1.65
SR66	AG4/SG4 LR66 177/376/377 SR626SW	LR626 (L) SR626 (S)	1176SO (S)	12–18 (L) 26 (S)	6.8 × 2.6	Commonly used in many wrist watches.
SR67	315	SR716 (S)		21 (S)	7.9 × 1.65
SR68	SR916SW 373	LR916 (L) SR916 (S)		26 (S)	9.5 × 1.6
SR69	AG6/SG6 LR69 171/370/371 LR920/SR920	LR921 (L) SR921 (S)		30 (L) 55 (S)	9.5 × 2.1
SR416	SR416SW 337	LR416 (L) SR416 (S)		8 (S)	4.8 × 1.6
SR712	SR712SW	SR712 (S)		9 (S)	7.9 × 1.3
SR731	SR731SW 24 329	LR731 (L) SR731 (S)		36 (S)	7.9 × 3.1
LR932		LR932 (L)		40 (L)	9.3 × 3.2	Rarely used independently. 8 of these in series are used to form an A23 battery.

Zinc air cells (hearing aid)

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.

Names				Typical Capacity (mAh)	Dimensions dia. × h. (mm)	Comments
Most common	Other common	IEC	ANSI
5	Red tab, AC5, ZA5	PR63	7012ZD	33	5.8 × 2.5	Marked as "discontinued" in Energizer data sheet.
10	Yellow tab, AC10, AC10/230, DA10, DA230, ZA10	PR70	7005ZD	91	5.8 × 3.6
13	Orange tab, ZA13	PR48	7000ZD	280	7.9 × 5.4
312	Brown tab 6135-99-752-3528 (NSN) ZA312	PR41	7002ZD	160	7.9 × 3.6
630	DA630		7007Z	1,000	15.6 × 6.2	No longer listed by Duracell
675	Blue tab, ZA675	PR44	7003ZD	600	11.6 × 5.4
AC41E		PR43	7001Z	390	11.6 × 4.2	Discontinued

Lithium-ion batteries (rechargeable)

An 18650 size lithium ion battery, with an alkaline AA for scale

Cylindrical lithium-ion rechargeable battery

Lithium-ion rechargeable batteries are generally not interchangeable with primary types using different chemistry, although certain sizes of lithium primary cells 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. 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 (2.6 in) long, but may be around 68 mm (2.7 in) long with an internal protection circuit. Safe and economic recharging requires use of chargers 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.

List of Li-ion sizes

Names		Typical capacity (mAh)	Dimensions, max., dia. × l. (mm)	Comments
Most common	Other common
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	Lithium ion AAA	340	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	14 × 43	Used in solar garden lights, used in rechargeable shavers (e.g., some Philips/Norelco).
14500	Lithium-ion AA	700–800	14 × 53	Same size as AA cell or longer if a protection circuit is included. Used in many LED flashlights. Some contain protections cells
14650		940-1600	14 × 65	Approximately 5⁄4 the length of a AA cell.
15270		450–600	15 × 27	Substitute for CR2 primary lithium.
16340		500–1000	16 × 34	Alternate substitute for CR123A primary lithium. Unprotected. (16 × 36, some protected versions).
16650		1600–2700	16 × 65	Made by Sanyo and a few Others, narrower version of 18650 cells.
RCR123A	17340, R123, RCR123, 2⁄3A, Tenergy 30200	750	17 × 34.5	Protected version, same size as, and substitute for, CR123 primary lithium for cameras and flashlights. Size 2⁄3A.
17500	A	1100	17.3 × 50	The same size as an A cell, and 1.5 times the length of a CR123A.
17670		1250	17 × 67	Twice the length of a standard CR123A.
18350		700–1200	18 × 35 (nominal)
18490		800–1300	18 × 49
18500		1400	18.3 × 49.8	About the same length as an A cell, but larger diameter.
18650	168A	1500–3600	18.6 × 65.2	This cell type is used in many laptop computer batteries, Tesla Roadster, Tesla Model S, Tesla Model X, electronic cigarettes, and LED flashlights.
19670	Protected 18650	2200–3600	19 × 67	Correct designation of protected 18650.
21700	20650, 21-70, 2170	4200–4800	21 × 70	Announced by Samsung and LG Chem in 2015 for electric bikes. As of January 5, 2017 currently being produced at Tesla Gigafactory 1 for Tesla Model 3.
25500		2500–5000	24.3 × 49.2	About the same diameter as a C.
26650		3300–5200	26.5 × 65.4	Popular size as ANR26650 LiFePO 4 cell from A123 Systems for radio control hobby use.
32600		3000–6000	32 × 61.9	About the same diameter as a D cell but longer.
32650		5000–6000	32 × 67.7	Popular in larger LED flashlights.
75400		80–150	7.5 × 40	Used in some E cigarettes.

Obsolete batteries

These types are no longer manufactured or only used in legacy applications.

Further information on obsolete batteries may be found on the web sites of the Classic Radio Shop in the UK and the Radiomuseum in Switzerland.

Names				Typical capacity (mAh)	Nominal voltage (V)	Terminal layout	Dimensions (mm)	Comments
Most common	Other common	IEC	ANSI
523	PX21	3LR50	1306A	580 (alkaline)	4.5		D: 17.1 H: 49.9	Used in cameras and Apple Macintosh computers (such as the 128K through 512K and similar).
531	PX19	3LR50	1307AP	580 (alkaline)	4.5		D: 17.1 H: 58.3	A 523 with snap connectors attached to either end. Used in some older cameras, notably the Polaroid Automatic Land Camera packfilm models.
No. 6	Ignition Cell, 6135-99-114-3446 (NSN) FLAG (in UK)	R40	905	35000–40000  (carbon‑zinc)	1.5 V		D: 67 H: 172	Typical modern uses include school science experiments, and starting glow plug model engines. Still commonly used in the UK for remote level crossing telephone handsets, where solar cells and rechargeable batteries have not been specified or retrofitted. Formerly used for primary cell powered alarms (those without mains power) and associated bell ringing, servant or nurse call systems, ignition systems, telephones, and (in pairs) in WWII US Navy battle lanterns. Modern cells are more likely to be Alkaline type made from 'D' cells. Terminals are screw posts with a maximum diameter of 4.2 mm. +: centre; −: edge.
A Battery	Eveready 742				1.5 V	Metal tabs	H: 101.6 L: 63.5 W: 63.5	Used to provide power to the filament of a vacuum tube.
B Battery	Eveready 762-S				45 V	Threaded posts	H: 146 L: 104.8 W: 63.5	Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies. Multiple B batteries may be connected in series to provide voltages as high as 300 V DC. Some versions have a tap at 22.5 volts.
GB Battery	C Battery Eveready 761				1.5 to 9 V	Threaded posts or banana sockets	H: 76.2 L: 101.6 W: 31.75	Originally used in vintage vacuum tube equipment for grid bias. Still popular for school science class use as a variable voltage supply as the current version has several taps at 1.5 volt intervals.
15-volt	Eveready 504 Mallory M154 NEDA 220 Rayovac 220	10F15 (Zn/MnO2)	220	65	15 V (10 cells)	Flat round (one each end)	H: 34.9 L: 15.1 W: 15.9	Used in older instruments and old battery–capacitor flashes. Only used in legacy applications, but as of 2016, still being manufactured.
22.5-volt	Eveready 412	15F20 (Zn/MnO2)	215	140	22.5 V (15 cells)	Flat round (one each end)	H: 50 L: 25 W: 15	Used in older instruments. the Regency TR-1 (first transistor radio) and old battery–capacitor flashes.
30-volt	Eveready 413	20F20 (Zn/MnO2)	210	140	30 V (20 cells)	Flat round (one each end)	H: 64 L: 25 W: 15	Used in older instruments.
45-volt	Eveready 415	30F20 (Zn/MnO2)	213	140	45 V (30 cells)	Both on same end	H: 91 L: 26 W: 15	Used in older instruments.
67.5-volt	Eveready 416		217	140	67.5 V (46 cells)	Both on same end	H: 88 L: 33 W: 25	Used in older instruments.

PP series

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. The PP4 was cylindrical; all the other types were rectangular. Most had snap terminals as seen on the common PP3 type.

Image	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 2 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 2 snap connectors, however 4 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 2 snap connectors spaced 35 mm (1+3⁄8 in) apart.
	PP10			9	H: 226.0 L: 66.0 W: 66.0	This battery had 2 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 4.5V batteries, and had a 4 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.

See also

• Battery holder
• Battery recycling
• Battery (vacuum tube)
• Button cell
• Comparison of battery types
• List of battery types
• Nine-volt battery
• Search for the Super Battery (2017 PBS film)

Further reading

• IEC 60086-1: Primary batteries - Part 1: General
• IEC 60086-2: Primary batteries - Part 2: Physical and electrical specifications
• IEC 60086-3: Primary batteries - Part 3: Watch batteries
• IEC 60086-4: Primary batteries - Part 4: Safety of lithium batteries
• ANSI C18.1, Part 1 Portable Primary Cells and Batteries With Aqueous Electrolyte - General and Specifications
• ANSI C18.1, Part 2 Portable Primary Cells and Batteries With Aqueous Electrolyte Safety Standard
• ANSI C18.2, Part 1 Portable Rechargeable Cells and Batteries - General and Specifications
• ANSI C18.2, Part 2 Portable Rechargeable Cells and Batteries Safety Standard
• ANSI C18.3, Part 1 Portable lithium Primary Cells and Batteries - General and Specifications
• ANSI C18.3, Part 2 Portable lithium Primary Cells and Batteries Safety Standard
• MOD Defence Standard 61-017 The Selection and Introduction of Batteries and Fuel Cells for Service Use
• MOD Defence Standard 61-021 Generic Specification for Batteries

External links

• A growing list of battery equivalents and details. Courtesy of the Highfields Amateur Radio Club (Cardiff, UK).
• Duracell Technical OEM Data Sheets
• Energizer/Eveready Data Sheets
• Energizer/Eveready European Data Sheets
• Energizer/Eveready Obsolete Battery Data Sheets
• Brand Neutral Drawings Of Common Batteries Based On ANSI C18-2007
• EU Report on battery labelling
• Batteries CROSS-REFERENCE INDEX