is cr123a the same as cr2

No, CR123A and CR2 batteries are not the same. The CR123A battery, also known as the 123A, is a 3-volt lithium battery commonly used in high-drain devices such as tactical flashlights, digital cameras, and security systems. It is larger in size and has different dimensions compared to the CR2 battery. The CR2 battery, on the other hand, is also a 3-volt lithium battery but is smaller and cylindrical in shape. It is commonly used in cameras, laser pointers, and other electronic devices. It's important to note that these two types of batteries are not interchangeable due to their different sizes and shapes. It's crucial to use the correct battery type recommended by the device manufacturer to ensure proper functionality and performance. When shopping for batteries, make sure to check the device's specifications and select the appropriate battery type to avoid compatibility issues.