CR2032 batteries are a common type of non-rechargeable battery, also known as coin cells or button cells, due to their small, flat, and round shape, resembling a coin. Here's a breakdown of their specifications and characteristics:
Specifications and Characteristics:
- Nominal Voltage: 3.0 volts
- Chemistry: Lithium/manganese dioxide (Li/MnO2)
- Capacity: Typically between 200 to 250 milliampere-hours (mAh), depending on the battery's manufacturer and the device's energy requirements.
- Diameter: 20.0 mm
- Height: 3.2 mm
- Weight: Approximately 3 grams
- Operating Temperature Range: Generally from -20°C to +70°C (can vary slightly depending on the manufacturer)
- Shelf Life: Usually 5 to 10 years, thanks to lithium's low self-discharge rate
- Standard Discharge Current: Usually varies with load, often around 0.2 mA with spikes depending on the device's requirements
Frequently Asked Questions:
1. What devices commonly use CR2032 batteries? CR2032 batteries are commonly used in small electronic devices such as computer motherboards (to power the CMOS for BIOS settings), calculators, remote controls, fitness appliances (like heart rate monitors), and wristwatches.
2. Are CR2032 batteries rechargeable? No, standard CR2032 batteries are not rechargeable. They are single-use lithium batteries. Rechargeable lithium coin cells do exist but have different model numbers and are less common.
3. How long do CR2032 batteries typically last? The lifespan of a CR2032 battery depends on the device's energy consumption. In low-drain devices like watches and remote controls, they can last several years, while in high-drain applications, they may need to be replaced more often.
4. Can I replace a CR2032 with a CR2025 or CR2016? Although all these batteries have a diameter of 20 mm, they have different thicknesses. A CR2032 is 3.2 mm thick, a CR2025 is 2.5 mm, and a CR2016 is 1.6 mm thick. Devices designed for a CR2032 may not hold thinner batteries securely, and the capacity and hence the battery life will also be different.
5. How should CR2032 batteries be disposed of? Because they contain lithium, CR2032 batteries should be disposed of properly. Many regions have specific recycling programs for batteries, and it's best to consult local regulations.
6. Can CR2032 batteries leak or explode? While leakage is less common in lithium coin cells compared to alkaline batteries, they can still leak under extreme conditions. The risk of explosion is rare and usually associated with improper usage, like attempting to recharge a non-rechargeable battery, exposing it to high heat, or puncturing it.
7. Are there environmental concerns with CR2032 batteries? Yes, like other batteries containing metals and chemicals, they can be harmful to the environment if not disposed of properly.
8. What is the difference between "CR" and "BR" in coin cell batteries? "CR" indicates lithium-manganese dioxide chemistry, which operates well in a wide temperature range, while "BR" indicates lithium-carbon monofluoride chemistry, which typically performs better in high temperatures but has a lower nominal voltage (2.8V vs. 3.0V for CR).
Always ensure you're buying the correct battery for your device, paying attention to both the size and the required specifications. If you're unsure, consult the device's manual or the manufacturer's guidelines.
