Last updated: June 9 2026 | For consumers, engineers, OEM buyers and product developers comparing CR2032 and CR2016 lithium coin cell batteries.
Quick Answer
CR2032 and CR2016 are both 3V lithium coin cell batteries with the same 20mm diameter, but they are not the same battery. The main difference is thickness and capacity. CR2032 is about 3.2mm thick and usually offers higher capacity, while CR2016 is about 1.6mm thick and is designed for thinner devices.
CR2032 usually lasts longer, but it is twice as thick as CR2016 and may not fit devices designed for CR2016. CR2016 may physically fit in some CR2032 holders, but it has lower capacity and may have poor contact or shorter runtime.
Best practice: Always use the battery model specified by the device manufacturer. Do not force a CR2032 into a CR2016 battery compartment, and do not stack two CR2016 batteries to replace one CR2032.
CR2032 vs CR2016: Main Differences
What Is a CR2032 Battery?
A CR2032 is a 3V lithium coin cell battery with a diameter of 20mm and a thickness of about 3.2mm. It is widely used in devices that need compact size, stable voltage and longer runtime than thinner coin cells can provide.
CR2032 Is Commonly Used In
- Car key fobs
- Medical devices and thermometers
- Computer motherboard CMOS backup
- Security sensors and smart devices
- Fitness trackers and Bluetooth accessories
- Meters, remotes and compact electronics
What Is a CR2016 Battery?
A CR2016 is a 3V lithium coin cell battery with the same 20mm diameter as CR2032, but only about 1.6mm thick. It is designed for compact devices where battery height is limited.
CR2016 Is Commonly Used In
- Slim car key fobs
- Remote controls
- Watches and calculators
- Small toys and electronic cards
- Thin sensors and compact devices
Can CR2032 Replace CR2016?
Usually, no. CR2032 and CR2016 have the same voltage and diameter, but CR2032 is twice as thick. A device designed for CR2016 may not have enough space for CR2032.
Can CR2016 Replace CR2032?
Sometimes CR2016 can physically fit in a CR2032 holder because it has the same diameter. However, it is usually not recommended because it is thinner and has lower capacity.
Practical issue: A CR2016 in a CR2032 holder may make weak contact because it is only half as thick. Even if it powers the device, the runtime will usually be much shorter.
Can Two CR2016 Batteries Replace One CR2032?
No. Do not stack two CR2016 batteries to replace one CR2032. One CR2032 battery provides 3V. Two CR2016 batteries stacked in series may provide about 6V, which can damage devices designed for a single 3V coin cell.
Although two CR2016 batteries together have a similar combined thickness to one CR2032, the voltage is not the same. Thickness alone does not determine compatibility. Voltage, polarity, contact design and device specifications must all match.
Why Does CR2032 Last Longer Than CR2016?
CR2032 usually lasts longer because it is thicker and contains more active material inside the cell. Both CR2032 and CR2016 are 3V lithium coin cells, but CR2032 has more internal volume and typically higher capacity.
Simple explanation: Same voltage does not mean same runtime. CR2032 and CR2016 both provide 3V, but CR2032 usually stores more energy because it is thicker.
Real-World Examples
Example 1: Slim Key Fob
A slim car key fob may require CR2016 because the battery compartment is very thin. Even though CR2032 offers longer runtime, the thicker cell may prevent the cover from closing or damage the contact structure.
Example 2: Wireless Sensor
A wireless sensor with low standby current may benefit from CR2032 because the higher capacity can extend service life. If the device has enough space, CR2032 is often preferred for longer maintenance intervals.
Application Guide: CR2032 vs CR2016
Which Battery Should You Choose?
Choose CR2032 If
- The device manual specifies CR2032.
- The battery compartment can fit a 3.2mm thick coin cell.
- You need longer runtime or fewer replacements.
- The device is a sensor, meter, CMOS backup device, medical device or smart product that supports CR2032.
Choose CR2016 If
- The device manual specifies CR2016.
- The device has a thin battery compartment.
- Compact size is more important than maximum runtime.
- The device is a slim key fob, watch, small remote or compact electronic product.
Engineering Considerations for OEM Projects
For product design and OEM sourcing, battery selection should not rely only on voltage or diameter. Engineers should also evaluate mechanical fit, expected service life, discharge current and mounting method.
PKCELL CR2032 and CR2016 Battery Solutions
Need CR2032 or CR2016 Batteries for OEM Projects?
PKCELL supplies lithium coin cell batteries for key fobs, medical devices, meters, remote controls, security sensors, smart devices, consumer electronics and industrial applications.
For OEM buyers, PKCELL can support CR2016, CR2032 and other CR-series lithium coin cells, including standard cells, tabbed coin cells, pin-type versions, custom packaging, OEM labeling and application-specific battery selection.
Best fit: bulk CR2032 and CR2016 sourcing, coin cell batteries with tabs, PCB-mounted coin cell batteries, smart device batteries and OEM lithium button battery projects.
Request a Coin Cell Battery QuoteSafety Tips
- Do not recharge CR2032 or CR2016 batteries.
- Do not stack two CR2016 batteries to replace one CR2032.
- Do not force CR2032 into a thin CR2016 compartment.
- Do not mix old and new coin cells in one device.
- Do not short-circuit, puncture, heat, crush or open lithium coin cells.
- Install batteries with correct polarity.
- Keep coin cells away from children and pets.
- Recycle used batteries according to local regulations.
FAQ
Conclusion
CR2032 and CR2016 are both 3V lithium coin cell batteries with the same 20mm diameter, but their thickness and capacity are very different. CR2032 is thicker and usually lasts longer, while CR2016 is thinner and better for compact devices.
For replacement use, follow the device manual. For OEM projects, choose based on battery compartment depth, expected service life, current demand, mounting method, documentation and long-term supply requirements.
Post time: Jul-04-2025
