CR1632, CR2032, and CR2025 are three common models that, while similar in appearance, differ significantly in capacity, dimensions, and suitable applications.Button lithium batteries are widely used in various electronic devices due to their compact size and stable performance.
1. Introduction and Basic Parameter Comparison
1. CR1632
- Introduction: The CR1632 is a small lithium-manganese button battery with a diameter of 16mm, a thickness of 3.2mm, and a nominal voltage of 3V.
- Typical Capacity: 120-140mAh
- Chemistry: Lithium-Manganese Dioxide (Li-MnO₂)
- Common Brands: Panasonic, Sony, Duracell (DL1632), Energizer (EC1632)
- datasheet
2. CR2032
- Introduction: The CR2032 is one of the most widely used button batteries, with a diameter of 20mm, a thickness of 3.2mm, and a nominal voltage of 3V.
- Typical Capacity: 220-240mAh (approximately 1.5-2 times that of CR1632)
- Chemistry: Lithium-Manganese Dioxide (Li-MnO₂)
- Common Brands: Panasonic, Maxell, VARTA
- datasheet
3. CR2025
- Introduction: The CR2025 is intermediate between the CR1632 and CR2032, with a diameter of 20mm, a thickness of 2.5mm, and a nominal voltage of 3V.
- Typical Capacity: 160-170mAh
- Chemistry: Lithium-Manganese Dioxide (Li-MnO₂)
- Common Brands: Panasonic, Sony, GP
- datasheet
2. Performance and Dimension Comparison
| Parameter | CR1632 | CR2025 | CR2032 |
|---|---|---|---|
| Diameter (mm) | 16 | 20 | 20 |
| Thickness (mm) | 3.2 | 2.5 | 3.2 |
| Voltage (V) | 3 | 3 | 3 |
| Capacity (mAh) | 120-140 | 160-170 | 220-240 |
| Energy Density | Low | Medium | Highest |
| Self-Discharge | Low (~1%/year) | Low (~1%/year) | Low (~1%/year) |
Key Differences:
- Dimensions:
- CR1632 has the smallest diameter (16mm), making it suitable for compact devices.
- CR2025 and CR2032 share the same diameter (20mm), but CR2025 is thinner (2.5mm vs. 3.2mm).
- Capacity:
- CR2032 has the highest capacity (240mAh), ideal for high-power devices.
- CR2025 offers moderate capacity, while CR1632 has the lowest.
3. Application Scenarios
1. Applications of CR1632
- Typical Devices:
- Ultra-thin calculators, digital scales
- Small remote keys (e.g., car keys)
- Miniature medical devices (e.g., thermometers)
- Advantages:
- Compact size, ideal for space-constrained devices.
- Limitations:
- Lower capacity requires frequent replacement.
2. Applications of CR2032
- Typical Devices:
- Motherboard CMOS batteries (computer BIOS power)
- Smart locks, wireless doorbells
- Bluetooth trackers (e.g., Tile, AirTag)
- Advantages:
- High capacity and long battery life.
- Universally compatible and easy to purchase.
- Limitations:
- Thicker design may not fit ultra-thin devices.
3. Applications of CR2025
- Typical Devices:
- Slim remote controls (e.g., TV/AC remotes)
- Electronic toys, LED accessories
- Some glucose meters
- Advantages:
- Thinner than CR2032, balancing capacity and size.
- Limitations:
- Lower capacity compared to CR2032 but better than CR1632.
4. Purchasing Recommendations
- Choose Based on Device Space:
- If the battery compartment diameter ≤ 16mm → Only CR1632 fits.
- If the battery compartment diameter = 20mm and thickness ≤ 2.5mm → Choose CR2025.
- If the battery compartment diameter = 20mm and thickness ≥ 3.2mm → Prioritize CR2032 (higher capacity).
- Choose Based on Battery Life Needs:
- Short-term use/low-power devices → CR1632 or CR2025.
- Long-term use/high-power devices → CR2032.
- Precautions:
- Do not mix different models! Although the voltage is the same, size differences may cause poor contact or incompatibility.
- Opt for reputable brands (e.g., Panasonic, VARTA) to ensure quality.
5. Frequently Asked Questions
Q1: Can CR2032 replace CR2025?
- If the device battery compartment only supports 2.5mm thickness, CR2032 (3.2mm) will not fit.
- If space allows, CR2032 provides longer battery life.
Q2: What’s the difference between CR1632 and CR2016?
- CR2016 has a diameter of 20mm (same as CR2032) but is thinner (1.6mm) with lower capacity (~90mAh), suitable for ultra-thin devices.
Q3: How long do button batteries last?
- Unopened storage: 5-10 years (very low self-discharge rate).
- Actual use: Varies by device power consumption, typically months to years.
Q4:What is the difference between CR1632 and CR2032? Interchangeable?
1632 and 2032 are the dimensions (models) of the two-button batteries. 1632 means the maximum diameter is 16mm and the thickness is 3.2mm; 2032 means the maximum diameter is 20mm and the thickness is 3.2mm; the voltage of the two batteries is the same, the shape is similar, the biggest difference is The diameter is different. This kind of battery needs to be equipped with a special battery holder when installation. The size is fixed, and only a certain fixed size (model) can be installed. It is not universal and cannot be interchanged.
Q5:If two CR1632 button batteries are used overlappingly, does the power double?
Button batteries are the same as other batteries. When they are connected in series, the voltage is added and the current is unchanged; when they are connected in parallel, the voltage is unchanged and the current is added. For overlapping use, it should be connected in series, with the voltage doubled and the current unchanged.
Q6:Can button battery CR1632 replace CR1620?
It cannot be replaced because the sizes of the two different types of button batteries are different. The voltage of the two-button batteries is 3V, but the specifications and capacities are different, depending on the product used.
The size and capacity of the two batteries:
(1) CR1620 size: 16.0 * 2.0MM, capacity: 70 mA
(2) CR1632 size: 16.0 * 3.2MM, capacity: 120 mA.
Conclusion
- CR1632: Small size, low capacity → Best for miniature devices.
- CR2025: Slim design, moderate capacity → Balances size and battery life.
- CR2032: High capacity, universal compatibility → Ideal for high-power devices.
Always check the device manual to ensure compatibility with voltage and dimensions!
What are the common brands?
⚠️ Beware of counterfeit brands!
Safety Warning
Please keep this product out of the reach of children!!!!