CR2450 vs. CR2032: Are they interchangeable?


CR2450 and CR2032 are both lithium coin cell batteries, and while they share some similarities, they are not interchangeable due to differences in size, capacity, and voltage. Here's a breakdown of the two batteries and their differences:

CR2450 vs CR2032


  • Size: The "24" in CR2450 indicates a diameter of 24mm, and "50" signifies a thickness of 5.0mm.
  • Voltage: It typically has a nominal voltage of 3 volts.
  • Capacity: CR2450 batteries generally have a higher capacity compared to CR2032, due to their larger size.
  • Applications: Commonly used in devices that require a larger power source, such as calculators, watches, and some small electronic devices.


  • Size: The "20" in CR2032 indicates a diameter of 20mm, and "32" signifies a thickness of 3.2mm.
  • Voltage: It also typically has a nominal voltage of 3 volts.
  • Capacity: CR2032 batteries have a smaller capacity compared to CR2450, due to their smaller size.
  • Applications: Used in a wide range of devices, including calculators, watches, small remote controls, and various types of small electronic devices.

CR2450 vs CR2032


While both batteries operate at 3 volts, their physical size and capacity differences mean they are not interchangeable in most cases. The size discrepancy means that a CR2450 battery will not fit into a device that requires a CR2032, and vice versa. Additionally, the differences in capacity mean that using a CR2032 in place of a CR2450 could result in inadequate power supply, potentially leading to shorter battery life or erratic device behavior.

If you are replacing a battery in a specific device, it is important to consult the device's manual or specifications to ensure that you are using the correct type and size of battery. Always use the battery recommended by the device manufacturer to ensure optimal performance and safety.