CR2032 Coin Cell : Pin Configuration Its Applications
A coin cell is a tiny, squat cylinder-shaped single cell battery that is made of metal. This type of coin cell is mainly designed to use in portable electronic devices like toys, wrist-watches, computers, etc. As compared to button cells, these are available in a wider size. The best example of this cell is the CR2032 coin cell.
Coin cell is an essential component in personal computers because they allow them to keep certain system settings once the system is turned off. Most of the coin cells include manganese dioxide (alkaline), silver oxide (Sio2), or lithium (Li) and its lifespan is many years based on its usage. This article discusses an overview of a CR2032 coin cell and its working with applications.
What is a CR2032 Coin Cell?
A CR2032 coin cell or a lithium energizer is a round-shaped small battery, used in different high-powered electronic devices like computers, wristwatches, hearing aids, car keyless entry transmitters glucose monitors. These coin cells are available in a compact size, 1 to 6mm height 5 to 25mm diameter.
In this coin cell, ‘CR’ is a battery chemistry classification, the first two digits signify its diameter (20mm) whereas the remaining digits signify its thickness or height in tenths of mm (3.2). There are major battery-manufactured companies that design these coin cells like Panasonic, Energizer, Maxell, Duracell, Renata, Philips, Sony, etc. As compared to alkaline cell batteries, coin cell batteries last longer, are weightless, operating temperature ranges wide but a bit costly. These types of cell batteries provide long service life to the devices where it is used. The lifespan of this coin cell battery mainly depends on different factors like temperature, conditions of storage, physical damage, quality of material, storage time, etc. If you are looking for a coin cell battery that is made with high-quality materials, works in all climate conditions, strong, long lifespan then a coin cell battery is a very suitable and best choice. The lifespan mainly depends on the application. For example, a car key fob lasts for 4 to 5 years.
The pin configuration of the CR2032 coin cell is shown below which includes two pins like positive terminal and negative terminal which are discussed below.
- Pin1 (Positive Terminal): The bottom body of the cell is a positive terminal that is made with stainless steel.
- Pin2 (Negative Terminal): The insulated top cap is known as the negative terminal
The features and specifications of the CR2032 coin cell include the following.
- Lithium (Li) coin cell
- Height is 3.2 mm diameter is 20 mm.
- It has outstanding leakage resistance characteristics
- This coin cell uses MnO2 (manganese dioxide) as its positive active material whereas Li (lithium) is used as its negative active material.
- The required voltage supply is 3.0 Volts
- Current supply (Max) is 0.19A
- The typical weight is 3.0 grams
- Operating temperature ranges from.30C to 60C
- Self-discharge: is per year is 1%
- Non-rechargeable battery
- Its service life is 720 hours at 20°C with 15kΩ Load
- Its typical capacity is 240 mAh at 20°C with 15kΩ Load
The equivalent CR2032 cell batteries are CR2032, BR2032, 5004LC, DL2032, KCR2032, KECR2032 ECR2032 based on the manufacturer. These cell batteries may have the same voltage, height, diameter as the coin cell battery.
For instance, the diameter voltage of a CR2016 cell battery is equal to CR2032 except for the height, so it is not fitted into the device securely. A CR1632 coin cell battery has a similar voltage height to the CR2032 battery but the diameter is 4mm. So understanding its specifications is very important to use in a suitable application.
Cr2032 lithium battery datasheet
Customers also viewed
Sony Genuine Fresh Date CR2032 2032 Lithium 3V Batteries (20 pieces) Replaced By Murata
HIGH QUALITY BRAND NAME100% SATISFACTION GUARANTEED
Murata Genuine Fresh Date CR2032 2032 Lithium 3V Batteries Exp 2027 (20 pieces) Replaces Sony
Murata Lithium Batteries Replaces Sony are used Ideal for toys games, watches, keyless entry, LED lights, heart rate monitors, glucose monitors, calculators, pet collars and bathroom scales. Murata is one of the leading providers of lithium micro batteries that power a broad range of electronics globally. The batteries provide excellent stability for electronics while being lightweight and still having high energy output of 3 volts performance and 220mAh capacity, almost double that of conventional batteries. Voltage remains stable even for long periods of discharge, which improves the reliability of equipment that use the battery. Superb characteristics over a wide temperature range of.30 to 70 degrees C. Battery construction ensures maximum leakage resistance over a long span of time. Batteries utilize Murata’s sealed innovative technology to minimize battery self-discharge.
Works for Watches, computer motherboards, calculators, PDAs, electronic organizers, garage door openers, toys, games, door chimes, pet collars, LED lights, sporting goods, pedometers, calorie counters, stopwatches and medical devices
Equivalent to BR2032, CR2332, BR2332, DL2032, SB-T15, 2032, EA2032C, ECR2032, L14, L2032, LF1/2V
This Battery is cross-referenced as: AWI L14, Energizer ECR2032, Duracell CL2032, Gold Peak CR2032, Panasonic CR2032, Rayovac CR2032, Renata CR2032, Seiko CR2032, SB-T15, Toshiba CR2032, Varta CR2032, IEC CR2032. Polar s725x, Boss DB-30 metronome, Taylor Electronic Scale, Apollo Wireless Presentation Remote #33062. UltraDot 4Dot Match Red Dot scope. Polar F6 heart monitor watch Cateye Double Wireless bike computer CC-CD300W
View Full Product Data Sheet HERE
CR2032 Lithium Battery
Microcell 3V CR2032 Lithium Battery is expertly for backup power supply for all kinds of electronic products, such as Computer mainboard, Watch, Calculators, Remote Controls, etc. Also available in Alkaline Battery Zinc-Carbon Battery.
About 25 days after confirming the order
UM38.3, UL, CE, ROHS, IEC60086, MSDS
Free Label Design Customized packaging
- 1~2 days for exiting brands for sample
- 5~7 days for OEM samples
- 25 days after confirming order
Details about CR2032 Lithium Battery
CR button cell is a lithium-manganese primary battery, The upper part is the negative terminal that also acts as an instructor, while the bottom side is a positive metal.
As their name implies these batteries are designed to power relatively smaller devices. The most commonly used lithium cell is also called “Lithium coin”.
Lithium button cell batteries have an age of almost 2 to 3 years. They last a year if used continuously like in a wristwatch and for 2-3 years in other devices where usage is not continuous like remote controls of speakers and car central locking system. Compared to other batteries they are safer due to a small size and low power.
It’s important to remember that battery cells that are new shall perform way better than cells from a warehouse 2 to 3 years old. It doesn’t matter if they are unused just there on the shelf for 2 years, but they will not give the same result as the new ones, nor they will last very long. They would go for not more than a year or even less.
·CR2032 Lithium Battery Brief Datasheet
– Chemical system: Li-manganese dioxide CR2032 (Mercury and Cadmium free) – CR2032 Lithium Battery Dimensions: Φ:20.0mm, H: 3.2mm – CR2032 Lithium Battery Average voltage: 3.0 V – CR2032 Lithium Battery Nominal weight: 3.0g – CR2032 Lithium Battery Nominal Capacity: 220mAh, it can maintain over 97% volume after one year, over 92% after two years. – Operating Temperature:-20°c–60°c – Pins/Tags Available – Shelf life2years
-CR2032 Lithium Battery 1 pack.CR2032 Lithium Battery 2 pack.CR2032 Lithium Battery 5 pack We also provide Customized Pack Sizes, just tell us your Idea!
·CR2032 Lithium Battery Specifications
You can Download CR2032 Lithium Battery Specifications here, in that datasheet, you will see the CR2032 Lithium Battery capacity, CR2032 Lithium Battery discharge curve, CR2032 Lithium Battery current, CR2032 Lithium Battery milliamp hours, CR2032 Lithium Battery maximum current, CR2032 Lithium Battery temperature range, etc.
-Strong Production Capacity: 7 Fully-automatic production lines and 20 machines to ensure the battery capacity, and you will no worry about stable availabilityHigh Quality: 5 strict inspection procedures provide you 0 worry about quality 0 complaints from your customers. Each battery comes with a “quality warranty”. Design, safety, manufacturing, and qualification follow Microcell’s stringent battery standards, which incorporate parts of the IEC battery standardsOEM Service: We have a B2B-dedicated multifunctional team with deep technical expertise and unique designs for hot products in over 40 countries. We can give you the hottest packaging styles and label designs for free regarding your ideasOne-Stop Solution: Customer-centric business approach. The dedicated team of professionals can help you save your time (consultation, suggestion, design, packaging, forwarder, delivery time reply time) since we have a one-stop solution service.
Computer mainboard, Watch, Calculators, Remote Controls
CR2032 Panasonic. BSG, CR2032 Datasheet
is to guarantee that it is fully or mostly discharged. Once it is discharged it can be disposed of as non-hazardous waste.
You can dispose of a fully charged or partially discharged lithium battery as a hazardous waste after they are first
neutralized through an approved secondary treatment. The need for a secondary treatment prior to disposal is a
requirement of the U.S. Land Ban Restrictions of the Hazardous and Solid Waste Amendments of 1984. A secondary
treatment center can only receive these batteries as manifested hazardous waste. The waste code for charged lithium
Notice: The information and recommendations set forth are made in good faith and are believed to be accurate at the date of preparation.
CR2032 Summary of contents
Lithium batteries are neither specifically listed nor exempted from the Federal Environmental Protection Agency (EPA) hazardous waste regulations as promulgated by the Resource Conservation and Recovery Act (RCRA). The only metal of possible concern in a lithium battery is lithium that is not a listed or characteristic toxic hazardous waste. Waste lithium batteries can be considered a reactive hazardous waste if there is a significant amount of unreacted, or unconsumed lithium remaining in the spent battery.
Currently all Panasonic lithium batteries are regulated by the International Maritime Organization (IMO), 2010 edition under Special Provisions 188 and 230. If you build any of our lithium cells into a battery pack, you must also assure that they are tested in accordance with the UN Model Regulations, Manual of Test and Criteria. Part III, subsection 38.3, 5 Effective December 29, 2004, the DOT requires that the outside of each package that contains primary lithium batteries, regardless of size or number of batteries, be labeled with the following statement: #x201C.
- CR2032 datasheet
- CR2032 data sheet
- CR2032 pdf datasheet
- CR2032 component
- CR2032 part
- CR2032 distributor
- CR2032 RoHS
- CR2032 datasheet download
Copyright ©2010. 2023 Elcodis Company Ltd. All Rights Reserved. Elcodis is a trademark of Elcodis Company Ltd. inthe U.S. and/or other countries. All other trademarks are the property of their respective owners.
Driving Circuits from a CR2032 Lithium Coin Cell
Just another good example of ‘lesson learned’. I often use the very common CR2032 coin cell batteries to drive my circuits. Small, cheap, easy to get and there is a quite a range of good and cheap battery holders.
But recently I have tested an complete over the top design which pushed the poor little CR2032 far beyond its limits. Time to grab a few facts from the datasheet for further reference.
To get a good example I found a quite elaborate CR2032 datasheet from Duracell. I think other batteries behave quite similar to this.
The general key fact of an CR2032 are obvious and quite easy to grab from the datasheet:
If you study the datasheet more closely you will see that the voltages drop sharply after it reaches 2.8V (after it has delivered about 170mAh).
ESR (Equivalent Series Resistor):about 18 to 20 Ohms.
The ESR (Equivalent Series Resistor) or IR (Internal Resistance) is quite flat up to 150mAh of capacitance – there it reaches about 20 Ohms. At 170mAh it reaches something like 30 Ohms. This is quite hefty. In comparison good capacitors have a series resistance from some Ohms to a fraction of an Ohm – so it is always good to put some (even electrolytic) capacitors in parallel to the battery. If you are concerned that switching on or of of your circuits discharges the battery to much by charging up the capacitors – there is a simple trick to prevent it: put the capacitors in front of the ‘on’ switch so that are always charged and will not charge after your circuit is switched on. The leakage current will be so small that it will be neglectable in most cases.
But if you want to calculate how much constant current you can draw from these batteries you have to use Ohm’s law:
If you take the later and say you want no voltage drop higher that 1.2 Volts – because after that your circuit reaches 1.8 Volts which makes your microcontroller most probably going brown out. Applying these with the ESR of 20 Ohms, you will get something like 60 mA you can draw by them (I = 1.2V/20Ohm). You if calculate more conservative and do not want to go below 2.8V – which gives you some 0.2 Volts head room – you will only be able to draw 10 mA (I = 0.2V/20Ohm) – just enough for an LED. These calculations do not consider the voltage drop of the battery of its life time.
In the bottom line: If you use those batteries you have to consider the 20-30 Ohms series resistance. Especially if you draw some constant current (spikes can be easily removed using capacitors). Yo have to assume 170mAh as maximum capacitance because then the CR2032 reaches 2.8Volts and the ESR goes up to a whopping 30 Ohms – going up from there very steep. Because of the high ESR of the CR2032 you will most probably not be able to draw more than 20-30 mAh safely (as constant current).
Perhaps it is even better to get a boost converter to 3 or 3.3V – to suck out all the juice in the battery. This should should be good for the environment too. Or even better get rechargeable Lithium Cells.
So driving an RGB with an 5V boost op converter is impossible. At white (all three LEDs draw 20mA) it is 60mA current at 5V, considering a efficiency of 80% this will give you more than 120 mAh at 3.3V. Impossible or the CR2032. So my intended design will never work. I wish I had done those calculations before I designed it and not after I saw that the prototype does not work.
Some Closer Look
As we see the higher the current is the more loss we get by the ESR of 20 Ohms. So the question is how much power we can get from an CR2032. If we want to draw the maximum amount of power over a short time we simply take the power:
And we know that the voltage is
If we create a little graph from it we get
So we see that the maximum is somewhere at 75mA and somwhere at 0,1125 Watts. Perhaps the real theoretical value is a bit off – but most real batteries will be a bit off too, so it is a good enough aproximation.
So that is somewhat consistent to our previous calculations to not exceed 80mA to avoid a too big voltage drop.
But how many energy can we draw from an CR2032? For this we simply calculate the watt hour of the battery:
But this is not very astonishing. The less current you draw the less loss you got at the internal resistor. But I am unsure if there is this resistor, which burns energy to heat. But since the batteries get hot if you draw too much power you will get some loss. But I do not think that the loss is equal to a 20 Ohm resistor. But the main finding is clear – the more current you draw the more loss you have.
What to do?
From the Комментарии и мнения владельцев I got the tip to put the lithium coin cells in series to get a higher coltage at the current draw. But this will enlarge the voltage swing at different current levels (from 6V at 0mA to 3V at 150mA). This can be dangerous for your circuit. A better approach would be to put the batteries in parallel to half the internal ESR – so you would still get 1.5 Volts at 150mA.
Of course to counter current spikes you should allways put sufficiently sized capacitors in parallel. Sufficiently sized depends on the level of current spikes and there time. Just check out how a Farad is defined and you can derrive the needed value (which is the product of voltage change and time).
But in most of my designs space is a rare good. So no parallel batteries and no big capacitor banks.
Something that could work is sucking the power with a boost converter to get a steady output voltage independent of the current draw. This would of course enhance the loss but at least we get the voltage we want at an expense of the efficiency. Right now the calculations are a bit too complicated for this evening. But updates will follow