Difference Between And 2016 Battery
If your device takes a coin cell, the single most important spec to check is thickness, not diameter. Many people assume a 2032 and a 2016 are interchangeable because both are 20 mm across, and then the battery either won’t fit or loses contact. First check the stamped code on the old cell or the device manual for CR2032 versus CR2016.
Difference between 2032 and 2016 battery is mainly thickness: both are 20 mm diameter and 3 V, but the 2032 is 3.2 mm thick while the 2016 is 1.6 mm, so the 2032 typically provides roughly twice the usable capacity and longer runtime in the same device.
Physical Dimensions Comparison
The 2032 and 2016 coin cells share the same diameter, 20 millimeters, but differ in thickness: the 2032 is 3.2 millimeters tall while the 2016 is 1.6 millimeters tall. Those two numbers are the core physical difference that determines fit and stack height in devices.
Because the diameter is identical, they use the same round contact area in most holders, but the difference in height changes how the cell meets spring contacts and whether the battery door closes. The extra thickness of the 2032 also usually means more internal active material, which typically gives it higher capacity than a 2016, though exact capacity varies by manufacturer.
For example, very slim devices such as ultra-thin remote controls, slim card-sized trackers, or certain wristwatch designs often call for the 2016 to keep the case profile low. Devices with a deeper battery well, like many key fobs, coin-style sensors, and some calculators, commonly accept 2032 because the extra thickness fits and yields longer time between replacements.
| Model | Diameter | Height | Practical note |
|---|---|---|---|
| 2032 | 20.0 mm | 3.2 mm | Thicker, higher capacity, needs more clearance and spring pressure |
| 2016 | 20.0 mm | 1.6 mm | Thinner, fits shallow compartments, shorter runtime for same chemistry |
The numeric code shows size: 20 means 20 millimeters diameter, while 32 means 3.2 millimeters thickness and 16 means 1.6 millimeters thickness.
If you need longer runtime and the device has room and solid contacts, choose the 2032; if the device is intentionally thin or lists 2016, use the 2016. Always confirm the device specification and check that the replacement sits flat, the cover closes, and contacts press firmly before putting the device back into service.
Voltage Ratings Explained
Both the CR2032 and CR2016 coin cells are lithium manganese dioxide cells with the same nominal voltage, 3 volts, so they present the same voltage to a device when fresh. The practical difference is how that voltage holds up under load, because the thinner CR2016 has less active material and higher internal resistance than the thicker CR2032.
Fresh cells of either type will measure slightly above their nominal voltage at open circuit, and the voltage falls as the cell delivers current and ages. Under moderate to heavy load the CR2016 will show larger voltage sag than the CR2032, so a device that cuts off at a fixed voltage can quit sooner with a 2016 even though both start at 3 volts.
| Specification | CR2032 | CR2016 |
|---|---|---|
| Nominal voltage | 3 volts | 3 volts |
| Fresh open-circuit behavior | Typically measures at or slightly above nominal, then declines with use | Typically measures at or slightly above nominal, then declines with use |
| Voltage under load | Lower voltage drop, holds closer to nominal under moderate load | Higher voltage drop, greater sag under the same load |
| End-of-life voltage behavior | Device may operate longer before the voltage falls below the device cutoff | Device may reach cutoff sooner due to greater sag despite same nominal start |
| Compatibility note (voltage) | Interchangeable by voltage in many devices, but capacity and sag differ | Interchangeable by voltage in many devices, but check holder fit and sag |
For example, a compact Bluetooth tracker that samples battery voltage only under brief pulses can report a low battery sooner with a CR2016, because the short pulse causes a larger instantaneous drop in voltage than the same pulse on a CR2032. That is a voltage-behavior issue, not a different nominal voltage.
Safety and compatibility checks: always confirm the device specifies a 3 volt coin cell, avoid mixing old and new cells, and do not substitute solely on voltage if the device requires the thicker cell for contact or capacity reasons. If a device is failing despite correct nominal voltage, measure the battery under the device’s load or try the thicker CR2032 to reduce sag and extend usable life.
Typical Applications for Each Battery
2032 cells are thicker and store noticeably more energy than 2016 cells, so they are used where longer life or higher drain is needed; 2016 cells are thinner and used where space is the limiting factor and the device draws very little current. Choosing between them is usually a tradeoff of available thickness versus required runtime and contact fit.
| Feature | 2032 | 2016 |
|---|---|---|
| Diameter | 20 mm | 20 mm |
| Thickness | About twice as thick | About half the thickness of 2032 |
| Relative capacity | Higher, typically more than 2016 | Lower, shorter runtime under similar load |
| Typical uses | Devices needing longer life or higher drain | Very thin enclosures and low-drain gadgets |
Devices Using 2032
Common 2032 applications include wristwatches, car and home key fobs, bike computers, many motherboard CMOS batteries, calculators, glucose meters, and some compact medical devices. These devices either need the longer runtime that the thicker cell provides or have housings and contacts that accept the extra thickness reliably.
For higher-drain functions like frequent remote use, backlighting, or wireless transmitters, 2032 is usually the safer choice because it keeps voltage higher for longer under load. Always check the battery compartment marking and the device manual before swapping cells.
Devices Using 2016
2016 cells are chosen for very slim products where height is the constraint, for example thin watches, slim LED lights, some card-style security tokens, and small sensor nodes where current draw is minimal. Designers accept the lower capacity because the device is expected to use tiny amounts of current or only run intermittently.
Substituting a 2016 in place of a 2032 will work only if the device accepts the thinner cell and you accept a shorter interval between replacements. If a device specifically lists 2032, using 2016 is usually a convenience compromise, not a direct replacement.
If the device specifies 2032, choose 2032 for reliable life and contact. Use 2016 only when the device calls for it or when space prevents a thicker cell and you accept reduced runtime.
Battery Life and Discharge Rates
The CR2032 normally delivers substantially longer runtime than the CR2016 because the 2032 is thicker and therefore stores more chemical energy, so under the same load a 2032 will usually outlast a 2016. Both are 3 volt lithium coin cells, but the 2032 handles pulsed and moderate loads better because it has lower internal resistance and more usable capacity.
Physically, both batteries share the same diameter, but the 2032 is roughly twice as thick as the 2016, which is the core reason for the capacity difference. Chemistry is the same in typical CR-series cells, so nominal voltage is the same and runtime differences come from available ampere-hours and internal resistance.
| Characteristic | CR2032 | CR2016 |
|---|---|---|
| Diameter | Same as 2016 (nominally 20 mm) | Same as 2032 (nominally 20 mm) |
| Thickness | Thicker (about double) | Thinner (about half of 2032) |
| Nominal voltage | 3 V | 3 V |
| Relative capacity | Higher, more usable mAh under light and moderate loads | Lower, shorter runtime under same load |
| Pulse/high current behavior | Better, less voltage sag | Worse, more voltage drop and reduced effective life |
Discharge behavior matters more than raw capacity for many devices. For low-drain, steady-draw applications like real-time clocks and simple remotes both cells will work, but the 2032 lasts longer. For devices that demand repeated pulses of current, like some LED indicators, sensors that wake frequently, or wireless fobs, the 2032 will maintain voltage and deliver usable energy longer.
For example, if a sensor wakes every minute and draws short bursts, a 2016 may appear to fail sooner because each burst causes larger voltage sag and the cell reaches the device cutoff voltage faster.
In practice, that can turn into weeks or months less run time compared with a 2032 in the same socket when space allows the thicker cell.
If space and holder accept the larger cell, choose the CR2032 for longer life and stronger pulse performance; if clearance is tight, use the CR2016 but expect shorter runtime under the same load.
Cost Comparison of Both Batteries
The average cost of a CR2032 battery typically ranges from $0.50 to $3.00 per unit, while a CR2016 battery generally costs between $0.30 and $2.50 each. Prices can vary based on brand, quantity purchased, and retailer, with bulk purchases often providing more significant savings.
| Battery Type | Average Cost (per unit) |
|---|---|
| CR2032 | $0.50 – $3.00 |
| CR2016 | $0.30 – $2.50 |
When considering cost, it’s essential to factor in the typical applications of each battery. The CR2032 is widely used in devices such as watches, fitness gadgets, and remote controls, while the CR2016 is often found in smaller devices like key fobs and smaller electronic toys. This difference in application can influence the overall availability and pricing in different markets.
For example, if a device specifically requires a CR2032, purchasing a CR2016 will not suffice, even if it appears cheaper. Always verify the battery type needed for your device to avoid unnecessary costs on the wrong battery.
In practice, when buying batteries, bulk purchasing can lead to significant savings. Retailers often offer discounts when purchasing packs of multiple batteries, which can decrease the cost per unit substantially. Additionally, when comparing prices, consider the quality of the battery, as lower-priced options may not provide the same reliability or lifespan.
Which Battery is Right for You?
The primary difference between 2032 and 2016 batteries lies in their physical dimensions and capacity. A 2032 battery has a diameter of 20 mm and a thickness of 3.2 mm, while a 2016 battery is also 20 mm in diameter but is only 1.6 mm thick. This means the 2032 typically has a higher capacity, making it suitable for devices that require more power.
Considerations for choosing between these two types include:
For example, if you are using a digital watch or a key fob, a 2016 battery may suffice, but if you’re powering a remote control or a small electronic device, a 2032 battery would likely be more effective for maintaining performance over a longer period.
| Battery Type | Diameter (mm) | Thickness (mm) | Typical Capacity (mAh) |
|---|---|---|---|
| 2032 | 20 | 3.2 | 200-220 |
| 2016 | 20 | 1.6 | 150-170 |
When deciding which battery to use, consider the power requirements of your device. If it drains power quickly, opt for the 2032. However, if the device is low-drain, the 2016 may be sufficient. Always prioritize using the specific battery type recommended for your device to ensure optimal performance and safety.
Safety and Storage Tips
2032 cells are thicker and hold more energy than 2016 cells, and that extra stored energy changes how they react to heat, short circuits, and physical damage. Treat the two types differently for packing and long term storage because the 2032 can store more energy and therefore presents higher thermal and swelling risk under abuse.
Heat and swelling risks concentrate where button cells are stressed by shorting, crushing, or exposure to high temperatures. Both 2032 and 2016 cells will vent, leak, or swell if abused, but a swollen 2032 contains more stored energy and can cause larger pressure or heat events in a confined device.
| Characteristic | CR2032 | CR2016 |
|---|---|---|
| Diameter | 20 mm | 20 mm |
| Thickness | About 3.2 mm | About 1.6 mm |
| Nominal Voltage | About 3 V | About 3 V |
| Capacity | Substantially higher than 2016 (more stored energy) | Lower capacity, less stored energy |
| Practical consequence | Longer run time, greater heat/swelling potential under abuse | Shorter run time, smaller physical swell if abused |
For example, storing a mixed drawer of loose 2032 and 2016 cells in your toolbox raises risk if metal tools contact terminals. Keep them in their original packaging or in labeled, separate compartments so sizes cannot be swapped into the wrong device or touch conductive surfaces.
Immediate warning: If a child swallows a button cell or you suspect ingestion, seek emergency medical attention right away. Button cells can cause severe internal injury quickly.
Quick Summary
Choose 2032 when you need more capacity and thicker cell, choose 2016 for thinner, low-profile devices that accept lower capacity.
Frequently Asked Questions
Can I use a 2016 in place of a 2032 battery?
You can sometimes fit a 2016 into a 2032 holder, but 2032 is 3.2 mm thick and 2016 is 1.6 mm thick, so the thinner 2016 may not make proper contact and will have lower capacity than the 2032.
How much longer does a 2032 last compared to a 2016?
A 2032 typically has significantly more capacity than a 2016, often about two to three times as much, so expect roughly double or more runtime under the same load; check the mAh rating printed on the package for the exact difference.
Do 2032 and 2016 batteries get hotter or pose different heat risks?
Both are nominally 3 V lithium coin cells, you should not recharge them, and they are sensitive to heat and short circuits, so follow the device manual and the battery datasheet for temperature and storage limits.
When should I replace a 2016 instead of a 2032 in a device?
You should replace with the size the device specifies, so use 2016 only if the device lists 2016 or the battery compartment fits a 1.6 mm thick cell, otherwise use the specified 2032 for correct contact and longer life.
What common buying mistakes do people make when choosing between 2032 and 2016 batteries?
A common mistake is buying by label color or brand without checking size and capacity, so verify the battery is labelled 20 mm x 3.2 mm for 2032 or 20 mm x 1.6 mm for 2016 and check the mAh on the package to avoid wrong fit or short runtime.
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