Photo Lithium batteries are a type of non-rechargeable battery that is commonly used in electronic devices, particularly in photography equipment. These batteries are known for their high energy density, long-lasting power, and reliability. 

CR123 batteries are cylindrical batteries that are commonly used in high-drain devices such as digital cameras, flashlights, and medical devices. These batteries have a voltage of 3V and a capacity of around 1500mAh, making them a popular choice for devices that require a lot of power. They are also lightweight and can operate in extreme temperatures.

CR2 batteries are another type of cylindrical battery that is commonly used in photography equipment, particularly in compact cameras and flashes. These batteries have a voltage of 3V and a capacity of around 800mAh, making them smaller and less powerful than CR123 batteries. However, they are still a popular choice due to their compact size and long shelf life.

2CR5 / 245 batteries are rectangular batteries that are commonly used in cameras and other high-drain devices. These batteries have a voltage of 6V and a capacity of around 1400mAh, making them a popular choice for devices that require high voltage and capacity. They are larger than CR123 and CR2 batteries but are still relatively compact.

CRP2 / 223 batteries are another type of rectangular battery that is commonly used in cameras and other electronic devices. These batteries have a voltage of 6V and a capacity of around 1500mAh, making them a popular choice for devices that require high voltage and long-lasting power. They are smaller than 2CR5 batteries but have a higher voltage.

CRV3 batteries are another type of rectangular battery that is commonly used in digital cameras. These batteries have a voltage of 3V and a capacity of around 3000mAh, making them a popular choice for devices that require high capacity and long-lasting power. They are larger than CR123 and CR2 batteries but have a much higher capacity.

Photo Lithium batteries are an important part of modern photography equipment. The type of battery used will depend on the device and its power requirements. CR123, CR2, 2CR5, CRP2, CRV3 are some of the most popular types of photo lithium batteries, each with their own unique advantages and applications. By understanding the different types of Photo Lithium batteries, photographers can make informed decisions about which batteries to use for their equipment.