This is a list of the sizes, shapes, and general characteristics of some common primary and secondary battery types in household, automotive and light industrial use.
The complete nomenclature for a battery specifies size, chemistry, terminal arrangement, and special characteristics. The same physically interchangeable cell size or battery size may have widely different characteristics; physical interchangeability is not the sole factor in substituting a battery.[1]
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 LiMnO2 ('Lithium') chemistry, in addition to its unique size.
The following tables give the common battery chemistry types for the current common sizes of batteries. See Battery chemistry for a list of other electrochemical systems.
| Image (AA size for scale) | Names | Typical capacity (mAh) | Nominal voltage (V) | (mm) | Comments | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Most common | Other common | IEC | ANSI | NSN | ||||||
| AAAA | MX2500 Mini UM 6 (JIS) 単6 #9 (China) | LR8D425 (alkaline) | 25A (alkaline) | 625 (alkaline) 400-600 (NiMH) | 1.51.2 (NiMH) | 8.3 × 42.5 | Sometimes used in pen flashlights, laser pointers, powered styluses, calculators, fishing lures. | |||
| AAA | U16 or HP16 (In the UK) Micro Microlight MN2400 MX2400 MV2400 Type 286 (Soviet Union/Russia) UM 4 (JIS)(carbon-zinc) [2] 単4 AM-4 (JIS)(alkaline) #7 (China) | LR03 (alkaline) R03 (carbon–zinc) FR03 (LiFeS2) HR03 (NiMH) KR03 (NiCd) ZR03 (NiOOH) | 24A (alkaline) 24D (carbon–zinc) 24LF (LiFeS2) | 6135-01-521-0378  [3] 6135-66-046-2599 6135-14-425-5849 6135-22-210-5836 6135-99-117-3143 [7] 6135-15-052-5343 6135-01-601-5817 6135-00-826-4798 6135-12-162-9946 6140-15-219-3801 | 1,200 (alkaline) 540 (carbon–zinc) 800–1,200 (NiMH) 500 (NiZn) | 1.51.2 (NiMH, NiCd) | 10.5× | 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 単3 (JIS)(carbon-zinc) AM-3 (JIS)(alkaline) #5 (China) | LR6 (alkaline) R6 (carbon–zinc) FR6 (LiFeS2) HR6 (NiMH) KR6 (NiCd) ZR6 (NiOOH) | 15A (alkaline) 15D (carbon–zinc) 15LF (LiFeS2) 1.2H2 (NiMH) 1.2K2 (NiCd) | 6135-15-051-9613  [13] 6135-66-037-7956 6135-19-003-8038 6135-14-304-9752 6135-01-601-5818 6135-99-195-6708 [18] 6135-21-844-0864 6135-00-985-7845 6135-99-052-0009 [21] | 2,700 (alkaline) 1,100 (carbon–zinc) 3,000 (LiFeS2) 1,700–2,800 (NiMH) 600–1,000 (NiCd) 1,500 (NiZn) | 1.51.2 (NiMH, NiCd) | 14.5× | Introduced 1907, but added to ANSI standard sizes in 1947. Used in many household electronic devices. Various fractional sizes are available; e.g.: AA (FLYCO Ni-Cd, Ni-Mh, 600–1,500 capacity, 14.0 × 40.0, used in small electronics, such as electric shavers. AA (see below) | ||
| AA | SAFT LS14250 Tadiran TL5101 UL142502P | CR14250 (LiMnO2) ER14250 (LiSOCl2) | 6135-01-669-4691 [22] 6135-01-435-4921 6135-14-469-5737 6135-01-370-2599 6135-14-476-8989 6135-14-484-0910 6135-01-411-3212 6135-14-483-5610 6135-99-957-5803 [30] 6135-12-337-5754 | 850–1,200 | 3 (LiMnO2) 3.6 (LiSOCl2) | 14.0 × 25.0 (nom.) 14.5 × 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. Also used in Renishaw Probes, commonly used in CNC machines, such like ones from Haas Automation. | |||
| A | R23 (carbon‑zinc) LR23 (alkaline) #4 (China) | 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., A and A. | ||||||
| B | U10 (UK) 336 (Russian Federation) #3 (China) | R12 (carbon‑zinc) LR12 (alkaline) | 8,350 (alkaline) | 1.5 | 21.5 × 60 | Most commonly found within a European 4.5-volt lantern battery. 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)[32] UM 2 (JIS) 単2 #2 (China) | LR14 (alkaline) R14 (carbon–zinc) HR14 (NiMH) KR14 (NiCd) ZR14 (NiOOH) | 14A (alkaline) 14D (carbon–zinc) | 6135-00-985-7846 [33] 6135-99-117-3212 [34] 6135-15-052-5341 6135-66-048-7857 6135-99-733-1071 [37] 6135-01-576-8491 6135-14-353-5228 6135-19-004-1990 6135-17-056-0142 6135-99-812-0878 [42] 6135-99-199-4779 [43] 6135-99-117-3212 | 8,000 (alkaline) 3,800 (carbon–zinc) 4,500–6,000 (NiMH) | 1.51.2 (NiMH, NiCd) | 26.2× | Can be replaced with an AA cell or up to four AAA cells in parallel using a plastic sabot (size adaptor), with proportional loss of capacity. | ||
| Sub-CSC | Type 332 (Soviet Union/ Russian Federation) | KR22C429 (NiCd) HR22C429 (NiMH) | 1,200–2,400 (NiCd) 1,800–5,000 (NiMH) | 1.2 | 22.2x | A common size for cells inside cordless tool battery packs. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. -, - and -sub-C sizes (differing in length) are also available. Soviet 332 type can be replaced with R10 (#4, 927, BF, U8) or 1.5 V elements from 3 V 2xLR10 packs.[44] [45] | ||||
| D | U2, HP2 or SP2 (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) | LR20 (alkaline) R20 (carbon–zinc) HR20 (NiMH) KR20 (Ni-Cd) ZR20 (NiOOH) | 13A (alkaline) 13D (carbon–zinc) | 6135-01-255-4786 [46] 6135-15-051-6850 6135-14-301-9080 6135-00-835-7210 6135-66-045-3419 6135-17-056-0140 6135-99-109-9428 [52] 6135-15-219-3387 6135-01-446-8310 6135-15-191-8540 6135-99-464-1938 [56] | 12,000 (alkaline) 8,000 (carbon–zinc) 2,200–11,000 (NiMH) 2,000–5,500 (NiCd) | 1.5 | 34.2× | Introduced 1898 as the first flashlight battery. Can be replaced with an AA cell or a C cell using a plastic sabot (size adaptor), with proportional loss of capacity. | ||
| F | R25 (carbon‑zinc) LR25 (alkaline) | 60 | 10,500 (carbon‑zinc) 26,000 (alkaline) | 1.5 | 33 × 91 | Four F cells are often found within 6-volt rectangular lantern batteries. | ||||
| N | Lady MN9100 UM 5 (JIS) 単5 E90 | LR1 (alkaline) R1 (carbon‑zinc) HR1 (NiMH) KR1 (NiCd) | 910A (alkaline) 910D (carbon‑zinc) | 6135-99-661-4958 [57] 6135-15-052-5342 6135-12-349-1146 6135-01-031-0862 6135-14-439-9946 6135-66-089-8336 | 800–1,000 (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.[63] Mercury batteries of the same dimensions are no longer manufactured. | ||
| A21 | A21 11A E11A MN11 L1016 4LR23 V11GA LR1016 | 4LR932 (alkaline) | 1811A (alkaline) | 6135-99-665-9374 [64] | 55 (alkaline) | 6 | 10.3 × 16.0 | Usually contains a stack of four LR932 button cells shrink wrapped together. | ||
| A23 | 144 23A 23AE 3LR50 8F10R 8LR23 8LR932 A23S CA20 EL12 E23A GP12A GP23 GP23A K23A L1028 LR23A LRV08 MN21 MN23 MS21 P23GA RVO8 VR22 V23GA[65] | 8LR932 (alkaline) | 1811A (alkaline) | 6140-22-200-0033  [66] 6135-14-514-2482 6135-99-763-7271 [68] | 55 (alkaline) | 12 | 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) | 12 | 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 (LiSOCl2) BA5800A/U (LiSO2) | 6135-25-145-8796  [69] 6135-01-440-7774 6135-99-760-9742 [71] | 7,500 (LiSO2) | 5.3 (LiSO2) | 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 | 6135-26-050-3959  [72] 6135-17-703-2958 6135-14-305-9243 | 3 | 21.8 × 74.6 | Internally contains two 1.5 V cells hence the nickname 'Duplex'. Is sometimes erroneously marketed as a "B" cell battery due to the similar size. In Switzerland, 2R10 batteries accounted for 0.003% of primary battery sales.[75] | ||||
| 4SR44 | PX28A A544 K28A V34PX 476A L1325F 28L | 4LR44 (alkaline) | 6135-01-444-2637 [76] 6135-14-549-0239 6135-01-268-2151 | 110–150 (alkaline) 170–200 (silver‑oxide) | 6.2 (alkaline) 6.5 (silver‑oxide) | 13 × 25.2 | Used in film cameras, medical instruments, dog training devices. Often simply a stack of four SR44 (LR44) button cells shrink wrapped together. | |||
| Image (AA size for scale) | Names | Typical capacity (mAh) | Nominal voltage (V) | Terminal layout | Dimensions (mm) | Comments | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Most common | Other common | IEC | ANSI | NSN | |||||||
| 4.5-volt | 1289 (in the UK) Pocketable battery 4.5 V MN1203 Type 3336 (Soviet Union/Russia) | 3LR12 (alkaline) 3R12 (carbon‑zinc) | 3LR12 (alkaline) 3R12 (carbon‑zinc) | 6135-14-376-5079  [79] 6135-01-125-4867 6135-13-119-1782 6135-15-212-3288 6135-14-226-6412 6135-14-552-6802 6135-15-167-7801 6135-12-120-1247 6135-26-050-3958 6135-33-155-0999 | 6,100 (alkaline) 1,200 (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. It usually contains three B cells in series. In Switzerland, 4.5-volt batteries account for only 1% of primary battery sales.[89] | ||
| PP3, 9-volt, or E[90] | Radio battery Smoke alarm battery Square battery Transistor battery 006P MN1604 Type Krona (Soviet Union/Russia) | 6LR61 (alkaline) 6LP3146 (alkaline) [91] 6F22 (carbon‑zinc) 6KR61 (NiCd) 6HR61 (NiMH) | 1604A (alkaline) 1604D (carbon‑zinc) 1604LC (lithium) 7.2H5 (NiMH) 11604 (NiCd) 1604M (mercury, obsolete)[92] | 6135-01-369-9792 [93] 6135-99-634-8080 [94] 6135-19-003-7917 6135-12-186-9177 6135-99-813-3838 [97] 6135-14-363-5842 6135-00-900-2139 6135-21-898-8449 6135-13-118-4403 6135-15-126-1831 6135-12-380-6813 6135-14-246-5048 6135-14-368-9793 6135-12-148-7026 6135-15-209-2996 6135-01-447-0949 | 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[109] | 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 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) | 6135-66-131-8057  [110] 6135-66-131-8057 6135-01-202-8113 6135-12-316-9235 6135-15-218-3786 6135-00-643-1310 6135-14-226-6120 6135-33-103-2754 6135-26-050-3957 6135-12-121-1326 6135-12-371-1930 6135-14-306-4747 6135-17-104-0545 6140-15-185-7182 6135-01-333-6737 | 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 | 4R25X (carbon‑zinc) 4LR25X (alkaline) | 915 (carbon‑zinc) 915A (alkaline) | 6135-99-645-6443 [124] 6135-00-643-1310 6135-98-104-2560 | 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 | 6135-01-568-8832 [127] 6135-00-825-6692 6135-66-024-4371 | 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) | 6135-21-892-5239  [130] 6135-01-365-2707 6135-12-364-9832 6135-01-275-1363 | 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. Often contains four LR61 cells, which are similar AAAA cells. | ||
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 A 123 CR123 17345 16340 CR-123A 6135-99-851-1379 (NSN) | CR17345 (lithium) | 5018LC (lithium) | 1,500 (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[134] | A lithium primary battery, not interchangeable with zinc types. A rechargeable lithium-ion version is available in the same size and is interchangeable in some uses. According to consumer packaging, replaces (BR)A. In Switzerland, these batteries accounted for 16% of lithium camera battery sales. | ||
| CR2 | 15270 (Li-ion rechargeable, 15266 (Li-ion, 6135-99-606-3982 (NSN) | CR15H270[136] | 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, these batteries accounted for 6% of lithium camera battery sales. | ||
| 2CR5 | EL2CR5 DL245 RL2CR5 KL2CR5 6135-99-577-2940 (NSN) | 2CR5 | 5032LC[137] | 1,500 | 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. Contains 2 CR123A cells.[138] | ||
| CR-P2 | BR-P2 223A CR17-33 5024LC | CR-P2 | 5024LC[139] | 1,500 | 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 cells exchangeable with CR123 cells. | ||
| CR-V3 | CRV3 RCR-V3 (Li-ion) | 5047LC 5047LF (primary)[140] | 3,000 (lithium) 1,300 (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[141] | 2,300[142] | 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: 1.1oz. | |||
| 7R31 | Kodak K7R31 538 | 4 (mercury)4.5 (alkaline) | Cartridge | Negative along side of the body; positive on the front, nose of the battery | Approx:H: 11 mm L: 40 mm W: 16 mm | Typically a cartridge of three mercury button cells for use in 110 format cameras. The later version of the battery used alkaline batteries. | |||||
See also: Button cell.
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.[143]
| Names | Typical capacity (mAh) | Standard discharge current (mA) | Dimensions × (mm) | Comments | ||
|---|---|---|---|---|---|---|
| IEC | ANSI | |||||
| CR927 | 30 | 9.5 × 2.7 | Used in a variety of LED art. Also used in some Lego toys. | |||
| CR1025 | 5033LC | 30 | 0.1 | 10 × 2.5 | ||
| CR1130 | 70 | 0.1 | 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.), and some pedometers. Also known as DL1130, BR1130, KL1130, L1130, ECR1130, KCR1130, E-CR1130, KECR1130[144] [145] | ||
| 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, and in some digital cameras to keep the time and date function running even when the main battery is taken out of the camera.[146] [147] | |
| 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 3 V, 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, device remote controls, remote key fobs for cars and other vehicles. Also in other devices such as key finders like Apple's AirTag. Weighs around 2.9 g.[148] | |
| 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. | |||
| CR2050 | 350 | 20 × 5.0 | Available. | |||
| CR2320 | 110–175 [149] [150] [151] | 23 × 2 | ||||
| CR2325 | 165–210 | 23 × 2.5 | ||||
| CR2330 | 265 (CR) 255 (BR) | 0.2 (CR) 0.03 (BR) | 23 × 3.0 | |||
| BR2335[152] | 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 | Used in XBand Modem to save updates and profile data. | ||
| 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 | 1,000 | 0.2 | 24.5 × 7.7 | Has the highest capacity of lithium button cell batteries.[153] | ||
| 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 rd 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 9 V terminal voltage. Such 9 V 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 6 V battery consisting internally of a stack of two CR1/3N and standardized by ANSI as 1406LC and by IEC as 2CR13252 (though some datasheets state it as 2CR11108 instead), is sold by Duracell (PX28L[154]), Energizer (L544, now obsolete[155]), and others. A CR1/3N is also used by photographers instead of two LR44 batteries in cameras. | |||
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.
| Names | Typical capacity (mAh) | Dimensions × (mm) | Comments (L), alkaline (S), silver-oxide | ||||
|---|---|---|---|---|---|---|---|
| Most common | Other common | IEC | ANSI | ||||
| SR41 | AG3/SG3/G3-A LR41 192/384[156] /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[157] 344/350[158] 387S[159] | 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 /LR154 6135-99-792-8475 (NSN)(alkaline) 6135-99-651-3240 (NSN)(S) A76/S76/EPX76 157/303/357 1128 MP, 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 194/394/380 6135-99-782-4675 (NSN)(S) | LR936 (L) SR936 (S) | 48 (L) 55–82 (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[160] | LR52 (L) MR52 (M) | 1126A (L)[161] | 335 (L) | 15.8 × 11.1 | 1.5 V (L), 1.35 V (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 L1131/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 [162] | 28–40[163] [164] | 11.6 × 1.65 | 1.55 V | ||
| 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)[165] 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 V371[166] | 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 | |||
| SR512 | 335 | SR512SW | 5.5 (S) | 5.8 × 1.3 | |||
| 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 | LR932 (L) | 40 (L) | 9.3 × 3.2 | Rarely used independently. 8 of these in series are used to form an A23 battery. | ||
| LR9 | 625V625U | 190 (L) | 15.5 × 6.0 | Key fob | |||
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 cm3 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 × (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.[167] | |
| 10 | Yellow tab, AC10, AC10/230,[168] DA10, DA230, ZA10[169] [170] | 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 | 7003ZD | 600 | 11.6 × 5.4 | |||
| AC41E | PR43 | 7001Z | 390 | 11.6 × 4.2 | Discontinued[171] | ||
See also: 18650 battery. Lithium-ion rechargeable batteries are generally not interchangeable with primary types using a different chemistry, due to their higher voltage. Many are also available with protection circuits that can increase their physical length; for example, an 18650 is around 652NaN2 long, but may be around 682NaN2 long with a protection circuit. Some such circuits increase cell diameter instead. The increased dimensions may mean the cell will no longer fit in battery compartments intended for cells without such circuitry.
Commonly-used designation numbers indicate the physical dimensions of the cylindrical cell, as given in IEC standard 60086-1 for cylindrical primary cells. The first two digits are the nominal diameter of the cell in millimetres, and the two following digits are generally the height in millimeters, with the fifth digit indicating cylindrical shape. Alternately, the last three digits can refer to the height in tenths of a millimeter. Manufacturers may use non-IEC designations for their products.
| Names | Typical capacity (mAh) | Dimensions (mm) | Comments | |||
|---|---|---|---|---|---|---|
| Id. | Other common | Diameter | Length | |||
| 07540 | 80–150 | 7.5 | 40 | Used in some electronic cigarettes. | ||
| 08570 | 280 | 8.5 | 70 | Used in some electronic cigarettes. | ||
| 10180 | Lithium ion AAA | 90 | 10 | 18 | Sometimes called AAA. Used in tiny flashlights. | |
| 10280 | Lithium ion AAA | 200 | 10 | 28 | Used in small flashlights. | |
| 10440[172] | Lithium ion AAA | 250–350[173] | 10 | 44 | Same size as AAA cell. | |
| 10850[174] [175] | 700-750 | 10 | 85 | Not widely available, used in some pen flashlights to replace two AAA cells in series. | ||
| 13400 | 550 | 13 | 40 | Commonly used in disposable electronic cigarettes. | ||
| 14250 | Lithium ion AA | 300 | 14 | 25 | Same size as AA cell. Used in the flashlight Lummi RAW. | |
| 14300 | Lithium ion AA | 520, 540 | 14 | 30 | Slightly longer than a 14250 due to an integrated Micro-USB receptacle and charging controller. Semi-proprietary, used in FOLOMOV C2 and EDC C2 mini flashlights. | |
| 14430 | 400–600[176] | 14 | 43 | Used in solar garden lights, toys, rechargeable shavers (e.g., some Philips/Norelco). | ||
| 14500[177] | Lithium-ion AA | 700–1,000[178] [179] | 14 | 53 | Similar size as AA cell. Those with a protection circuit are slightly longer. Used in many LED flashlights. Nominal voltage is 3.7 V. Variants include: | |
| 14650[182] | 940–1,200[183] | 14 | 65 | Approximately the length of a AA cell. | ||
| 15270[184] | RCR2 | 450–600 | 15 | 27 | Substitute for CR2 primary lithium. Nominal voltage usually is 3 V. | |
| 16340 | RCR123A | 550–800[185] | 16 | 34 | Alternate substitute for CR123A primary lithium.[186] Unprotected. (16 × 36, some protected versions[187]). | |
| 16650 | 1,600–2,500[188] | 16 | 65 | Made by Sanyo and a few others, narrower version of 18650 cells. | ||
| 17500[189] [190] | A | 830–1,200[191] [192] | 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 | 1,200–1,600[193] | 17 | 65 | Between the size of a 16650 and 18650. | ||
| 17670[194] [195] | 1,250–1,600[196] | 17 | 67 | Twice the length of a standard CR123A. | ||
| 18350 | 700–1,200[197] | 18 | 35 | |||
| 18490[198] | 800–1,400[199] | 18 | 49 | Slightly shorter than a 18500 cell. | ||
| 18500[200] [201] | 1,100–2,040[202] | 18 | 50 | About the same length as an A cell, but larger diameter. Occasionally sold and marketed as a "fat-A" size.[203] [204] [205] | ||
| 18650[206] [207] | 168A, 1865 | 1,300–3,500[208] | 18 | 65 | Widely regarded as the most produced lithium-ion cell size.[209] This cell type is used in many laptop computer batteries, cordless power tools, many electric cars, electric scooters,[210] most e-bikes, older portable powerbanks, electronic cigarettes,[211] [212] portable fans and LED flashlights. Nominal voltage is 3.6-3.7 V. | |
| 20700[213] | 2,800–4,100[214] | 20 | 70 | Introduced by Sanyo/Panasonic for use in portable power tools as higher-power and higher-capacity successor for 18650 cells. Quickly superseded by 21700. Also used for larger electronic cigarettes. | ||
| 21700 | 21–70, 2170 | 2,000–5,800[215] [216] | 21 | 70 | Announced by Samsung[217] and LG Chem in 2015 for use in electric bikes.[218] By January 2017, was being produced at Tesla Gigafactory 1 for the Tesla Model 3,[219] reaching a production rate of 1.8 billion cells annually (20 GWh per year) by mid-2018.[220] Also used for stationary storage (Tesla Powerwall 2 and Powerpack 2)[221] and larger electronic cigarettes. | |
| 25500[222] | 2,500–5,500[223] | 25 | 50 | |||
| 26500 | 26 | 50 | About the same dimension as a C cell. | |||
| 26650[224] [225] | 3,500–6,200[226] [227] | 26 | 65 | Popular size as[228] ANR26650 cell from A123 Systems for radio control hobby use. Also used in larger, high-powered LED flashlights and some electronic cigarettes. This size is sometimes used in devices that can take either one 26650 or three AAA cells in series in a cylindrical 3-cell battery carrier. | ||
| 26700 | 4,000-5,000 | 26 | 70 | LiFePO4 cells. | ||
| 26800 | 5,500–6,800[229] | 26 | 80 | A larger format for e-bikes and transport. Used in some flashlights. Higher capacity than traditional 26650 cells. | ||
| 32600[230] | 3,000–6,100[231] | 32 | 60 | About the same dimension as a D cell. | ||
| 32650[232] | 5,000–6,500[233] | 32 | 67.7 | Occasionally found in larger LED flashlights. | ||
| 32700 | 7,000 | 32 | 70 | LiFePO4 cells.[234] | ||
| 38120 | 38120s, 38120HP | 8,000-10,000 | 38 | 120 | LiFePO4 3.2 V. 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 and 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 12 V lead-acid car battery.[235] | |
| 38140 | 38140s | 12,000 | 38 | 140 | LiFePO4 3.2 V. Slightly taller version of the 38120 cells, most often used in electric bikes. Height including the screw terminals: 154 mm | |
| 40152 | 40152s | 15,000 | 40 | 152 | LiFePO4 3.2 V. Largest cylindrical LiFePO4 cells. Height including the screw terminals: 167 mm | |
| 4680 | 46800 | 9,000 | 46 | 80 | Concept introduced by Tesla in 2020 as a high energy capacity cell for use in EVs,[236] [237] and entered production in 2023.[238] [239] Also planned by JAC/Volkswagen in joint-development with CBAK as of early 2021.[240] Manufacturers include Panasonic and LG.[241] | |
| 4695 | 46950 | 10,200 | 46 | 95 | Occasionally found in larger LED flashlights. | |
| 46120 | 46 | 120 | Manufactured by Samsung SDI for future BMW cars.[242] | |||
These types are associated with legacy applications, such as for vacuum tube equipment (A, B, and C batteries), or are no longer manufactured.
(V) = Nominal voltage
| Names | Typical capacity (mAh) | (V) | Terminal layout | Dimensions (mm) | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|
| Most common | Other common | IEC | ANSI | ||||||
| 523 | PX21 | 3LR50 | 1306A | 580 (alkaline) | 4.5 V | D: 17.1 H: 49.9 | Used in cameras and Apple Macintosh computers (such as the 128K through 512K and similar). As the IEC name suggests, this is often just 3 LR50 batteries stacked together. | ||
| 531 | PX19 | 3LR50 | 1307AP | 580 (alkaline) | 4.5 V | 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 | 35,000–40,000 (carbon‑zinc) | 1.5 V | D: 67 H: 172 | Typical 20th century uses for this high capacity dry cell named for its 6-inch height include school science experiments, and starting glow plug model engines and in antique equipment. This dry cell is commonly used in the UK for remote level crossing telephone handsets, where solar cells and rechargeable batteries have not been specified or retrofitted. These were formerly used in primary cell powered alarms (those without mains power) and associated bell ringing, servant or nurse call systems, ignition systems, telephones,[243] to improve voice quality on long lines to the local switch by increasing the off hook line voltage, impulse wound clocks (once a minute a mechanical movement pulses to advance electrically driven hands), and (in pairs) in WWII US Navy battle lanterns. Modern cells identified as alkaline may be one or more 'D' cells in a holder. The terminal posts are threaded 8–32 (Unified Thread Standard), insulated terminal nuts are normally provided, conical profile helical spring terminals are added for specific applications. Stamped and formed sheet metal spring terminals for bare wire connections (fahnestock clips) were supplied for use with telephones; e.g., the Western Electric 'Blue Bell' KS-6456 printed in blue ink on a grey paper and the Eveready 'Colombia Gray Label' printed in red ink on grey paper. +: 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. | ||||
| 791 | Eveready 791 Eveready 791-A | 2R14 | 3 V | D: 23.81 H: 98.43 | Equivalent to two C batteries (BA-42) in series. Used in the M1 Bazooka. | ||||
| 15-volt | Eveready 504 | Fuji W10 Mallory M154 NEDA 220 Rayovac 220 | 10F15 (Zn/MnO) | 220 | 65 | 15 V (10 cells) | Flat round (one each end) | H: 34.9 L: 15.1 W: 15.9 | Used in older instruments[244] and old battery–capacitor flashes. Used in Bang & Olufsen Beomaster 2400 remote controls. Still being manufactured as of 2020.[245] |
| 22.5-volt | Eveready 412 | 15F20 (Zn/MnO) | 215 | 140 | 22.5 V (15 cells) | Flat round (one each end) | H: 50 L: 25 W: 15 | Used in older instruments.[246] the Regency TR-1 (first transistor radio) and old battery–capacitor flashes. These are also sometimes known as B batteries, but are very distinct from actual B cell batteries. | |
| 30-volt | Eveready 413 | 20F20 (Zn/MnO) | 210 | 140 | 30 V (20 cells) | Flat round (one each end) | H: 64 L: 25 W: 15 | Used in older instruments.[247] These were sometimes sold as B batteries for hearing aids and small radios. | |
| 45-volt | Eveready 415 | 30F20 (Zn/MnO) | 213 | 140 | 45 V (30 cells) | Both on same end | H: 91 L: 26 W: 15 | Used in older instruments.[248] Sometimes were sold as B batteries. | |
| 67.5-volt | Eveready 416 | 217 | 140 | 67.5 V (45 cells) | Both on same end | H: 88 L: 33 W: 25 | Used in older instruments.[249] Many of these were sold as B batteries for early transistor radios (before their function was replaced by the 9-volt PP3 battery). | ||
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, used in electric fencing, and PP9) is readily available.[250] 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.
(V) = Nominal voltage
| Image (with PP3/E-size for scale) | Names | Typical capacity (mAh) | (V) | Dimensions (mm) | Comments | ||
|---|---|---|---|---|---|---|---|
| Other common | |||||||
| PP1 | 6 | H: 55.6 L: 65.5 W: 55.6 | This battery had two snap connectors spaced 35abbr=onNaNabbr=on apart. | ||||
| PP3 | See PP3 battery | ||||||
| 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 | 2,500 | 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 35abbr=onNaNabbr=on apart. This type of battery is sometimes used in electric fencing applications. | |||
| PP9 | 276 NEDA 1603 6135-99-945-6814 (NSN) IEC 6F100 | 5,000 | 9 | H: 81.0 L: 66.0 W: 52.0 | This battery has two snap connectors spaced 35abbr=onNaNabbr=on 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. | ||||
Obsolete
