Lithium Ultra CR1620 3 V Lithium Battery x4

The CR1620 battery, a 3V lithium coin cell, is commonly used in a variety of small electronic devices. These include watches, calculators, remote controls (like car key fobs and garage door openers), and medical devices such as glucometers and heart rate monitors. They are also found in some computer components like CMOS batteries. 

Here's a more detailed breakdown:

Watches:

Many wristwatches, especially those with digital displays or multiple functions, use CR1620 batteries. 

Calculators:

Compact, portable calculators often rely on the CR1620 for power. 

Remote Controls:

Car key fobs and garage door openers are common applications for this battery. 

Medical Devices:

Devices like glucometers and heart rate monitors, which are often small and require long battery life, utilize CR1620 batteries. 

Computer Components:

Some motherboards and other computer components use CR1620 batteries as a CMOS battery to maintain system settings. 

Other Portable Devices:

Digital thermometers, electronic toys, and other compact electronic gadgets can also be powered by CR1620 batteries