You cannot use an 18650 battery instead of a CR123A because they differ in size and voltage. The CR123A is smaller (3V) compared to the larger 18650 (3.7V). Using the wrong type can damage your device, so always check compatibility before replacing batteries.
Using a 18650 battery instead of a CR123A battery is generally not advisable due to several key differences between the two. Here’s a detailed comparison based on the information gathered:
1. Size and Compatibility
- 18650 Battery: This battery measures approximately 18mm in diameter and 65mm in length. It is significantly larger than a CR123A battery.
- CR123A Battery: The CR123A measures about 17mm in diameter and 34.5mm in length. Because of its smaller size, it cannot accommodate an 18650 battery without modifications to the device.
2. Voltage Differences
- Voltage Output: A single 18650 battery typically operates at a nominal voltage of 3.6V to 3.7V. In contrast, two CR123A batteries in series provide a combined voltage of approximately 6V.
- This difference means that using an 18650 battery in a device designed for two CR123A batteries could result in insufficient voltage, potentially leading to underperformance or failure to operate.
3. Capacity and Energy Density
- Capacity:
- A typical 18650 battery has a capacity ranging from 1800mAh to 3500mAh, allowing for longer run times.
- A CR123A battery usually has a capacity of around 1500mAh to 3000mAh, depending on whether it’s rechargeable or disposable.
- The higher capacity of the 18650 makes it more suitable for high-drain devices, but this advantage is moot if the device cannot accommodate the larger size.
4. Rechargeability
- 18650 Batteries: These are rechargeable lithium-ion batteries, making them more cost-effective over time as they can be reused multiple times.
- CR123A Batteries: While there are rechargeable versions available (RCR123), standard CR123A batteries are typically non-rechargeable, which may lead to higher long-term costs if used frequently.
5. Applications
- Devices designed for CR123A batteries often include cameras, flashlights, and security systems, where compact size and lightweight characteristics are essential.
- On the other hand, devices that utilize 18650 batteries include high-performance flashlights, electric vehicles, and power tools, where higher energy demands are common.
Conclusion
In summary, while it might seem convenient to replace a CR123A battery with an 18650 battery due to their similar functions in some devices, the significant differences in size, voltage, and application make it impractical and potentially unsafe. Always refer to your device’s specifications to ensure compatibility with the intended battery type.For those looking for reliable lithium-ion solutions tailored to various applications, Redway Battery specializes in manufacturing custom Lithium LiFePO4 batteries designed for optimal performance across diverse needs.
