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. Nominal voltage usually is 3 V. Alternate substitute for CR123A primary lithium. Save money off big name brands plus get more! 12.95 mm with both offset 7 mm nominal from the wider battery edge. ... Are the watch battery 377 equivalent and 377A the same? 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. Depuis 1986, une offre couvrant plus de 200 000 références d'appareils et d'applications en piles, batteries et matériels de sécurité, disponibles en ligne et provenant des plus grands fabricants. Maximum pulse discharge current: 5 mA. No longer made by Duracell, nor listed in its official website, but still stocked as of 28 February 2017 by some re-sellers. 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. 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. [citation needed] Popular applications include laptop battery packs, electronic cigarettes, flashlights, electric vehicles, and cordless power tools. Mass is 120 g. Center distance between terminals is max. 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. Great order as usual. 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. Used in automobile key remotes and early digital watches. These watch button cells (also are known as coin cells) fit many sizes. Common alternative manufacturer's prefixes for these two types are "SG" for silver oxide and "AG" for alkaline. Manufacturers may have their own part numbers for IEC standard size cells. They were spaced 35 mm (, This battery has two snap connectors spaced 35 mm (. Stamped and formed sheet metal spring terminals for bare wire connections 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. Same diameter as AA battery, used in small electronics, including, Introduced 1911, but added to ANSI standard in 1959. The complete nomenclature for a battery specifies size, chemistry, terminal arrangement, and special characteristics. It was used in some early transistor radio amplifiers with a, 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, This page was last edited on 15 February 2021, at 03:50. Typically a cartridge of three mercury button cells for use in 110 format cameras. Used in automobile key remotes; e.g., Toyota Prius 2012. 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. Other uses include calculators, laser pointers, toys, LED "blinkies", and novelties. Used in military hand-held devices such as the. Devices intended for use with primary batteries may not operate properly with these cells, given the reduction in voltage. The same size as an A cell, and 1.5 times the length of a CR123A. Rarely, however, a manufacturer may include tiny bumps on the negative terminal, so flat-tops can be used in series. Shaped so that it can be inserted into a battery compartment only one way. Used in locations susceptible to high vibration/shock where connectors may be knocked off the terminals. ; Ever Ready sold "U2" (D) batteries as "SP2" (standard-duty zinc carbon) and "HP2" (heavy duty zinc chloride). 6,045 sold. Also, manufacturers have their systems for identifying cell types, so cross-reference tables are useful to identify equivalent types from different manufacturers. Lithium-ion cells are made in various sizes, often assembled into packs for portable equipment. Astuce : si vous désirez chercher votre pile rapidement, utilisez la fonction Ctrl - F … 10 Camelion AG4 / LR66 / 177 / 377 / LR626 pile bouton longue durée de vie (date d'expiratio… For example, a size 377 battery is the equivalent of a SR626SW battery, which is also the same is a AG4 / SG4 battery. A 523 with snap connectors attached to either end. Both standards have several parts that cover general principles, physical specifications, and safety. See lithium battery for discussion of the different performance characteristics. The internal cell construction may differ, common types are named bobbin, spiral and coiled. Can be replaced with AA cell using a plastic. Has the highest capacity of lithium button cell batteries. Largest cylindrical LiFePo4 cells. Made by Sanyo and a few others, narrower version of 18650 cells. 19.2 mm. Seiko Seizaiken 377 SR626SW Silver Oxide SWATCH Watch Batteries Use By Date 2025. Our business is simple. Use this Cross Reference Guide to compare Duracell battery products with corresponding product numbers from other manufacturers. The series comprised multi-cell carbon-zinc batteries used for portable electronic devices. These batteries ship free from the United States. Used in some lighted watches and some LED decorator lights (electronic. They have been replaced in some applications by zinc-air batteries, which also produce 1.35 volts. Don’t get stuck without these batteries when you need them most. Typical mass: 1.1 oz (31 g). Item Information. 9 V with a center tap was available by wiring in series. They were a single ⌀3.2 mm negative pin and a single ⌀4.0 mm positive pin spaced 13.0 mm apart. Usually contains four F cells. Pile load capacity – calculation methods 85 Case (c) is referred to as the alternative procedure in the Note to EN 1997-1 §7.6.2.3(8), even though it is the most common method in some countries. Renata Watch Batteries Swiss Made Cell Button Silv-Oxide 1.55v-377 SR626SW AG-4. Height including the screw terminals: 154mm, LiFePo4 3.2V. Portable devices requiring high current (3.0 mA) and long shelf life (up to 10 years). Introduced by Sanyo/Panasonic for use in portable power tools as higher-power and higher-capacity successor for 18650 cells. 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 commonly found within a European 4.5 volt lantern battery. Often simply a stack of four SR44 (LR44) button cells shrink wrapped together. Introduced by Tesla in 2020 as a high energy capacity cell for use in EVs. Use our batteries to power your small electronics, lights, and toys. Cylindrical cells typically have a positive terminal nub at one end, and a flat negative terminal at the other. 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. This cell type is used in many laptop computer batteries, cordless power tools, certain. 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. The current IEC standards for portable primary (non-rechargeable) batteries bear the 60086 number. You may experience shorter battery life using alkaline cells in certain cases if the device requires a high voltage to operate. Free shipping. Used in solar garden lights, used in rechargeable shavers (e.g., some Philips/Norelco). 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. Designations by IEC and ANSI standards do not entirely agree, though harmonization is in progress. Center distance between terminals is max. It usually contains three B cells in series. AG4 377A SR66 SR626SW LR626 SR626 Button Cell Batteries [50-Pack] AG6 371A LR920 SR920 SR920SW Button Cell Batteries [10-Pack] AG7 395A LR927 SR927SW LR57 SR927 Button Cell Batteries [20-Pack] For example, British standard "U" series batteries were often sold under manufacturer prefixes such as "C", "SP", "HP", etc. Used in many household electronic devices, Used in many household electronic devices Often this is done to steer customers towards a specific brand, and away from competing or generic brands, by obfuscating the common name. 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. Only US$5.99, shop 10pcs tianqiu ag4 lr626 377 sr626 177 1.5v watch batteries cell button watch battery at Banggood.com. Used in film cameras, medical instruments, dog training devices. Terminal center spacing 16 mm. £1.99. Flashlights and portable electronic devices may also use these types. For other uses, see, Cylindrical lithium-ion rechargeable battery, File:Тестер ТЛ-4 с батарейками типа 332.JPG, Canon Powershot A590 IS Camera User Guide, Piles bouton 1.5 V – piles electroniques. Battery equivalent to DL1130 BR1130 KL1130 L1130 ECR1130 KCR1130 E-CR1130 KECR1130", "VARTA CR2320 BATTERY 3V LITHIUM (4008496043651)", "Varta CR2320, 06320101401: Amazon.co.uk: Electronics", "Lithium Handbook: Industrial Batteries for Professionals", "Renata SA: Silver Oxide 0% Mercury, Low drain E", "344/350, Batteries and Battery Replacements m.csbatteries.com › 350-battery-344", "Exell A640PX 1.5V Alkaline Battery PX640A EN640A EPX640A LR52", "Energizer Industrial EN640A (discontinued)", "Renata 366 Watch Battery MiniPack of 1 at Battery Force", "Watch Battery Cross-reference Guide (Archived)", "équivalences et caractéristiques des piles", https://electrek.co/2020/09/22/tesla-4680-battery-cell-bigger-power-energy/, "LCR10440 Cylindrical Li-ion Battery Specification", "Keeppower 14500 1000mAh P1450C2 (Black) 2019", "SAFT LS14500 3.6 V Primary lithium-thionyl chloride (Li-SOCl2) High Energy Density Cell", "KeepPower 14650 1100mAh protected li-ion rechargeable battery 3.7V P1465C", "Vapcell 16340 800mAh 7A Button Top Battery", "HDS Systems: Frequently Asked Questions - Answers to questions about our flashlights and technologies", "KeepPower P1750C 17500 1200mAh P1750C Button Top Protected Li-ion Rechargeable Battery", "Lithium Ion Batteries (Individual Date Sheets): CGR17670HC: Cylindrical Model", "Lithium Battery Specification MODEL: 18490-1100mAh-10C", "Electronic Components & Solutions | Panasonic Industrial Devices", "Keeppower 18650 3600mAh P1836J (Black) 2019", "Keeppower IMR20700 4250mAh UH2042 (Black) 2017", "SPECIFICATION OF PRODUCT INR21700-40T Lithium-ion rechargeable cell for power tools", "Bench Test Results: Vapcell Purple 10A 5000mAh 21700…10A but overrated mAh, runs longer than Samsung", "Samsung SDI Unveils E-bike Battery Capable of 100km on Single Charge", "E-Bike Report From Eurobike: New Tech & New Batteries", "Tesla Gigafactory tour roundup and tidbits: 'This is the coolest factory in the world, Tesla Sets Record for EV Deliveries, but Losses and Solar Shrinkage Endure : 2019 is supposed to be “the year of the solar roof,” but Tesla’s solar business continues to wither, "FastTech 25500 3.7V 5500mAh Rechargeable Lithium Battery", "26650 Battery Bench Test Results and New Ratings Table", "Product Specification LFP-32650 LiFePO4 Battery", http://www.koreatimes.co.kr/www/tech/2020/09/419_296818.html, Tesla’s 4680 cell production line hints that Elon Musk’s ‘Alien Dreadnought’ is coming to life, First look at Tesla’s new structural battery pack that will power its future electric cars, JAC (And Volkswagen) Will Develop a 46800 Cell With CBAK Energy, A growing list of battery equivalents and details, Energizer/Eveready Obsolete Battery Data Sheets, Brand Neutral Drawings Of Common Batteries Based On ANSI C18-2007, https://en.wikipedia.org/w/index.php?title=List_of_battery_sizes&oldid=1006850390, Short description is different from Wikidata, Articles needing additional references from July 2011, All articles needing additional references, Articles with unsourced statements from October 2011, Articles containing potentially dated statements from 2008, All articles containing potentially dated statements, Wikipedia articles needing clarification from January 2017, Articles with unsourced statements from January 2021, Articles with unsourced statements from September 2020, Articles with incomplete citations from January 2021, Wikipedia articles needing clarification from June 2016, Creative Commons Attribution-ShareAlike License. Maximum discharge current: 3 mA. Batteriesinaflash.com has an abundant amount of size 377/376 watch batteries available. Round button cells have heights less than their diameter. [12], In Switzerland as of 2008[update], 4.5-volt batteries account for only 1% of primary battery sales.[13]. These types are associated with legacy applications or no longer manufactured. Introduced 1907, but added to ANSI standard sizes in 1947. In zinc-carbon or alkaline types they produce around 1.5 V per cell when fresh. A common battery type in cameras and photographic equipment. Negative along body, positive side of battery exposed for positive. [55] Many types are also available with an internal protection circuit to prevent over-discharge and short-circuit damage. 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. Slightly taller version of the 38120 cells, most often used in electric bikes. Use our batteries to power your small electronics, lights, and toys. Used in Skytronic PRO Audible Altimeter but also flow meters and organizers (as a memory backup battery). Used in some older cameras, notably the, Typical 21st century uses for this high capacity dry cell named so aptly for its 6 inch height include school science experiments, and starting, Used to provide power to the filament of a, This battery had two snap connectors spaced 35 mm (. Renata Watch Batteries - BUY 2 GET 1 FREE - 371 377 379 364 CR 2032 2025 Battery. I recommend your website to my friends when in need of batteries of the type you sell. Substitute for CR2 primary lithium. 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. 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. They contain two 3 V cells exchangeable with CR123 cells. Dry Leclanché (carbon-zinc), alkaline and Lithium batteries are the most common modern types. 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. This battery, introduced in 1901, was very common in continental Europe until the 1970s. With 10 batteries per pack you’ll have extra to keep around. Tableau equivalences des piles sur la boutique en ligne energy01 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. A set of 20 AG4 Alkaline Button Batteries. [citation needed] This Li-ion battery cell designation system is not used by all manufacturers for all batteries.[56]. In Switzerland as of 2008[update], these batteries accounted for 16% of lithium camera battery sales. Typical cylindrical cells have 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. Used in XBand Modem to save updates and profile data. Internally contains two 1.5 V cells hence the nickname 'Duplex'. Free postage. SAFT-brand cells (3600 mAh) are non-rechargeable. This item: Watch Battery Button Cell 377, 376, SR626SW, V377, SR66,AG4,LR626,LR66,565,606, (Pack of 5) CDN$9.99 Ships from and sold by AudioPoutine. 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.[3]. AG4 / 376 / 377 / LR66 Button Batteries: AG5 / 309 / 393 / LR48 Button Batteries: AG6 / 370 / 371 / LR920 Button Batteries: AG7 / 395 / 399 / LR927 Button Batteries: AG8 / 381 / 391 / LR1120 Button Batteries: AG9 / 394 / LR936 Button Batteries: AG10 / 389 / 390 / LR54 Button Batteries: AG11 / 361 / 362 / LR721 Button Batteries Same diameter as AA battery, used in small electronics, including electric shaver. 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. For example, a CR123 battery is always LiMnO2 ('Lithium') chemistry, in addition to its unique size. Multiple B batteries may be connected in series to provide voltages as high as 300 V DC. 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. These cells are commonly used in hearing aids. Negative and positive pins were spaced 18.1 mm apart. Battery Cross Reference Chart. Frequently used in digital watches. All these lithium cells are rated nominally 3 volts (on-load), with open circuit voltage about 3.6 volts. This item LR626 LR66 AG4 SR66 377 177 376 SR626 626A Button Cell Watch 1.5v Battery (40 Pcs) Rayverstar LR626 AG4 1.5V Alkaline (20-Batteries) Fits: 66, 606, 626, 376, 177, 377, GP377 (Full List Below) These batteries ship free from the United States. Variations include rechargeable Kentli 1.5 V lithium AAs (2800 mAh) and non-rechargeable SAFT-brand primary cells (2600 mAh). The ultimate energy capacity of a silver battery may be as much as twice that of an alkaline. The Maxell SR626SW battery is equivalent in size and function to the Energizer 377 battery, the Seiko SB-AW battery, and the Duracell D377 battery. This size is also used in radio-controlled scale vehicle battery packs and some Soviet multimeters. Introduced 1898 as the first flashlight battery. The same size as two R6 (AA) cells side by side. (101) 101 product ratings - Genuine Maxell 377 AG4 SR626SW Watch Cell Batteries 1.55v Silver Oxide. About the same length as an AA cell, but larger diameter. 52 items found from eBay international sellers. A rechargeable type is also made in this size. Packaging: Blister packs of 10 batteries This type of battery is also known as G4, LR66, LR626, SR626, SR626W, 376, 377, D376, D377. Manufacturers may assign proprietary names and numbers to their batteries, disregarding common, colloquial, IEC, and ANSI naming conventions (see LR44 battery as an example). Other names associated with the AG4 coin cell battery are: 376 377 G4A LR66 L626 LR626 and GP77. $9.85. Available in packs of 10, 30 50 and 100 and beyond! Some sizes may be interchangeably used in battery holders. 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. Various fractional sizes are also available; e.g., ​2⁄3 A and ​4⁄5 A. Those with a protection circuit are slightly longer. Pile Montre SONY 377 Argent - AG4 SR626SW SR66 LR626 376 SR626 V377 SR628 D377. We sell specialty batteries at blowout prices! IEC designation numbers indicate the physical dimensions of the cylindrical cell. This is just the battery size I needed for my MAGA watch! This battery contained two independent 4.5 V batteries, and had a four-pin connector. A CR1/3N is also used by photographers instead of two LR44 batteries in cameras. 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. Frequently used in digital watches and automobile remotes. Maximum discharge current: 1 mA. LiFePo4 3.2V. "18650" redirects here. Free postage. (70) 70 product ratings - NEW Energizer 377 D377 AG4 SR66 SR626SW Watch Batteries SILVER OXIDE. The "BR" prefix indicates a round lithium/carbon monofluoride cell. Other types[5] produce other voltages per package, as low as 1.2 V for rechargeable nickel-cadmium, up to 12 V for the A23 alkaline battery, a stack of 8 cells in the same overall format. Has become obsolete and hard to find. The capacity listed is for a constant resistance discharge down to 2.0 volts per cell. LiFePo4 3.2V. Les piles en oxyde d’argent Les piles générales. Since there are no "common" names beyond the AG designation, many vendors use these four designations interchangeably for the same physical sized cell. 5 x Maxell SR626SW SR626 AG4 377 1.55v Watch Batteries: Amazon.co.uk: Electronics Select Your Cookie Preferences We use cookies and similar tools to enhance your shopping experience, to provide our services, understand how customers use our services so we can make improvements, and display ads, including interest-based ads. Height including the screw terminals: 167mm. two 18650 cells, may have different diameter buttons if made by different manufacturers, and this can lead to incompatibility with devices. Often contains four LR61 cells, which are similar AAAA cells. [27], Also known as DL1130, BR1130, KL1130, L1130, ECR1130, KCR1130, E-CR1130, KECR1130[28][29], This is also the most common lithium cell. Both on one end. 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. These micro batteries, commonly referred to as button-cell batteries, power watches and small electronics such as calculators and health monitors. LiFePo4 properties: long lasting (2000+ cycles), safer, more stable, good continuous/peak discharge rates (3C/10C), less energy dense. From the late 1940s until the mid-1990s, mercury batteries were made in many consumer and industrial sizes. Sent by 1st Class Mail! Used in cameras and Apple Macintosh computers (such as the 128K through 512K and similar). Using alkaline batteries to substitute silver oxide batteries works most of the time depending on the device. 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. Polarity is usually stamped on the metal casing. Other names are BR2040, DL2040, ECR2040, E-CR2040, KCR2040, KECR2040, KL2040, L2040, L24. As well as other types, digital and film cameras often use specialized primary batteries to produce a compact product. In Switzerland as of 2008[update], these batteries accounted for 6% of lithium camera battery sales.[12]. Thesebatteriescomeatunbelievableprices.Watchesandclocksthatcostme$15torepacearenowdonebymeforunder$2. The IEC prefix "CR" denotes lithium manganese dioxide chemistry. Not to be confused with the vacuum tube B battery. 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. The difference is that the 377 has a silver oxide base, while the 377A is alkaline. Maximum pulse discharge current: 15 mA. 8 of these in series are used to form an. Free postage. Alkaline batteries are usually cheaper than silver oxide equivalents. Buy fashion watch battery online. © 2020 BatteryBlowout.com. Note: 14500 lithium batteries are not AA as they are 3.7 V; though 1.5 V AA compatibles (achieved with an internal voltage regulator [specifically a buck converter]) have been available since 2014 as were originally developed & released by Chinese company Kentli.[8]. A common size for cordless tool battery packs. Silver oxide batteries can be substituted for any alkaline battery because the size is the same. Rarely used independently. Most rechargeable cylindrical cells use a chemistry with a nominal voltage around 3.7 volts, but LiFePO4 cells produce only 3.2 volts. Don't … £1.65. The terminal voltage of a battery cell depends on the chemicals and materials used in its construction, and not on its physical size. Sony 364 (SR621SW) 1.55V Silver Oxide 0%Hg Mercury Free Watch Battery (3 Batteries) CDN$8.99 [26]Disposable equivalent of the Nikon EN-EL5 Li-ion rechargeable camera battery.[25]. Spring terminals. [121] The PP4 was cylindrical; all the other types were rectangular. ), and some pedometers. IEC batteries that meet the international IEC 60086-3 standard for watch batteries[40][clarification needed] carry a "W" suffix. Operating voltage: DC 1.5V, Capacity: 12mAh Fresh Stock! 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. | Portable UV Purifier", "CP1 (CP1, CP3353) Duracell Ultra M3 Prismatic Battery for Digital Camera Battery", "Duracell CP1 Lithium Prismatic Digital Camera Battery", "CR1130 lithium button cell batteries. ~18 mAh (alkaline) / ~26 mAh (silver oxide). AG4 Button Batteries. Its diameter is smaller on the other end. See Battery chemistry for a list of other electrochemical systems. Each cell needs around 1 cc of air per minute at a 10 mA discharge rate. Button cells are commonly used in electric watches, clocks, and timers. Labelled only, no physical keying for polarity. 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. Miniature zinc-air batteries are button cells that use oxygen in air as a reactant and have very high capacity for their size. Mercury batteries of the same dimensions are no longer manufactured. 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. One LiMnO2 cell can replace two alkaline or silver-oxide cells. Most had snap terminals as seen on the common PP3 type. According to consumer packaging, replaces (BR)​.