CR2 Battery Vs 123: What’s The Difference?

CR2 and 123 (CR123) batteries both deliver 3 volts and use lithium technology but differ mainly in size, capacity, and applications. CR2 batteries are more compact with lower capacity, ideal for small devices; CR123 batteries are larger, offering higher capacity suitable for high-drain equipment. These distinctions make them generally non-interchangeable.

How Do CR2 and CR123 Batteries Differ in Size and Dimensions?

CR2 batteries measure about 15.6mm in diameter and 27mm in height, making them compact for devices with limited space. In contrast, CR123 batteries are larger, approximately 17mm in diameter and 34.5mm tall, providing more internal volume for energy storage. This size difference usually prevents their interchangeability in devices. The compact size of CR2 suits portable and handheld devices, while the larger CR123 fits high-performance gadgets requiring more power.

What Are the Capacity and Runtime Differences Between CR2 and CR123?

CR2 batteries typically offer capacities ranging from 600 to 900 mAh, ideal for moderate-drain devices needing shorter runtimes. CR123 batteries give significantly higher capacity, from 1,300 up to 1,700 mAh, which extends device runtime considerably, especially in power-hungry equipment. This capacity advantage of CR123 batteries means they can power devices longer and deliver stronger currents, making them more cost-effective where extended runtime is critical.

Capacity Comparison Table

Why Are CR2 and CR123 Batteries Not Interchangeable?

Despite both outputting 3 volts, CR2 and CR123 batteries are generally not interchangeable due to substantial size differences. CR2 batteries are too small to fit securely in CR123 battery compartments, while the larger CR123 cannot fit into CR2 slots. Using the wrong battery size may cause poor electrical contact, device malfunction, or possible damage. Some rare devices may accommodate both types using adapters, but this is uncommon and not recommended without confirmation from the device manufacturer.

Which Battery Offers Better Performance for High-Drain Devices?

CR123 batteries typically outperform CR2 batteries in high-drain applications thanks to their superior capacity and higher current delivery. Devices like professional flashlights, tactical gear, and digital cameras with powerful flashes benefit from the extended runtime and stronger output of CR123 batteries. Meanwhile, CR2 batteries excel in smaller items where compactness and weight are priorities, with adequate power for moderate-drain use.

What Are Common Applications for CR2 and CR123 Batteries?

CR2 batteries are widely used in compact electronics such as point-and-shoot cameras, laser sights, small LED flashlights, fitness devices, and wireless security sensors, where size is a key factor. CR123 batteries are favored for more demanding applications like professional photography equipment, tactical flashlights, security cameras, and military-grade devices due to their robust performance capabilities.

How Does Cost Compare Between CR2 and CR123 Batteries?

CR2 batteries generally cost less per unit, making them attractive for devices with low to moderate power needs or for budget-conscious buyers. However, their lower capacity means they may require more frequent replacements, potentially increasing long-term costs. CR123 batteries command higher upfront prices but offer better power-to-cost efficiency in high-drain scenarios, often proving more economical over time when extended runtime is essential.

Can CR2 and CR123 Batteries Be Used Interchangeably?

No, CR2 and CR123 batteries cannot typically be used interchangeably due to their size and dimension differences, despite both having a 3V output. Device compatibility depends on physical fit and electrical contact; forcing one type into a compartment designed for the other risks poor performance or damage. Always follow manufacturer guidelines for battery type to ensure safety and optimal device operation.