Yes, you can replace two CR123A batteries with one 18650 battery, but check your device first! Two CR123As provide about 6V, while an **18650 offers around 3.7V. Make sure your device can handle this difference before making the switch.
When it comes to powering devices, understanding battery compatibility is essential. A common question arises: can you replace two CR123A batteries with one 18650 battery? This article will explore the specifications, advantages, and potential implications of making such a substitution.
Overview of Battery Specifications
CR123A Batteries
- Size: Approximately 17mm in diameter and 34.5mm in length
- Nominal Voltage: Typically around 3V
- Capacity: Generally ranges from 1400mAh to 1500mAh
- Type: Non-rechargeable lithium battery
18650 Batteries
- Size: Measures about 18mm in diameter and 65mm in length
- Nominal Voltage: Usually around 3.7V
- Capacity: Ranges from 1800mAh to 3500mAh
- Type: Rechargeable lithium-ion battery
Comparative Analysis
| Feature | CR123A Battery | 18650 Battery |
|---|---|---|
| Dimensions | 17mm x 34.5mm | 18mm x 65mm |
| Nominal Voltage | 3V | 3.7V |
| Capacity | 1400mAh – 1500mAh | 1800mAh – 3500mAh |
| Rechargeable | No | Yes |
| Common Uses | Cameras, flashlights | High-drain devices, laptops |
Can You Replace Two CR123A Batteries with One 18650?
Voltage Considerations
Using two CR123A batteries in series provides a combined voltage of approximately 6V (3V each). In contrast, a single 18650 battery provides around 3.7V. This significant difference in voltage means that using an 18650 battery in place of two CR123As may not provide sufficient power for devices designed for the higher voltage.
Physical Size Differences
The physical dimensions of the two battery types also present challenges:
- The 18650 battery is longer and slightly wider than a single CR123A battery. While some devices may accommodate an 18650 battery with modifications or adapters, many will not fit due to size constraints.
Device Compatibility
Some devices designed for two CR123A batteries may have internal circuitry that can handle different voltage inputs. However, this is not universally applicable:
- Many devices require the specific voltage provided by two CR123As and may not function correctly with a single 18650.
- Always check the device’s specifications to ensure compatibility before attempting to make such a substitution.
Advantages of Using an 18650 Battery
If a device can accommodate an 18650 battery, there are notable benefits:
- Rechargeability: An 18650 battery can be recharged multiple times, leading to long-term cost savings compared to frequently replacing CR123A batteries.
- Higher Capacity: Many 18650 batteries offer higher capacities than CR123A batteries, providing longer run times for compatible devices.
Conclusion: Making the Right Choice
In summary, while it is technically possible to use an 18650 battery instead of two CR123A batteries in some cases, it is generally not advisable due to differences in voltage and size. If your device requires the specific voltage provided by two CR123As, using an 18650 could lead to underperformance or malfunction.Before making any substitutions, always consult your device’s manual or specifications to ensure compatibility. Understanding these differences will help you make informed decisions when choosing batteries for your devices.
