Here are some key Features and Considerations:

Battery Compatibility: The holder is designed specifically for CR2032 coin cell batteries, which are 3-volt lithium batteries with a diameter of 20mm and a thickness of 3.2mm.

Material: The holder is made of plastic, which is a common material for such applications due to its lightweight and insulating properties.

Design: The holder typically consists of a plastic casing that houses the CR2032 battery securely. It has a positive (+) and negative (-) terminal, and there is a button cell contact connector mechanism to establish electrical contact with the battery.

Button Cell Contact Connector: The button cell contact connector is a mechanism within the holder that ensures proper electrical connectivity with the positive and negative terminals of the CR2032 battery. It often involves a spring-loaded or metal contact design to establish a reliable connection.

Polarity: It's crucial to observe the correct polarity when inserting the CR2032 battery into the plastic holder. The positive and negative terminals on the battery should align with the corresponding contacts in the holder.