what are button cell batteries

Button cell batteries, also known as coin cell batteries, are small and round batteries that are commonly used in small electronic devices such as wristwatches, calculators, hearing aids, and remote controls. They are called “button cell” batteries because of their shape, which is similar to that of a button or coin.

CR2430 battery Lithium batteries 3V button cell

Button cell batteries are usually made up of three main components: a metal casing, a cathode, and an anode. The metal casing is typically made of stainless steel or nickel-plated brass, and serves as the positive terminal of the battery. The cathode is a metal oxide compound that serves as the negative terminal, while the anode is made of zinc or lithium.

There are two main types of button cell batteries: primary and secondary. Primary button cell batteries are designed to be used once and then discarded. They typically have a high energy density and are used in devices that require a lot of power, such as digital cameras and handheld gaming devices.

Secondary button cell batteries, on the other hand, can be recharged and used multiple times. They have a lower energy density than primary batteries, but are more cost-effective in the long run. They are commonly used in devices that require a steady, low-level power supply, such as remote controls and medical devices.

There are several different sizes of button cell batteries, which are identified by a standardized code that consists of a letter and a number. The letter indicates the shape of the battery, while the number indicates its diameter and height. For example, a CR2032 battery is a lithium coin cell battery that is 20mm in diameter and 3.2mm thick.

Button cell batteries have a relatively long shelf life, and can last for several years if stored properly. They should be kept in a cool, dry place, and should not be exposed to extreme temperatures or moisture. When disposing of button cell batteries, it is important to do so properly, as they contain toxic chemicals that can be harmful to the environment. Many electronics retailers and recycling centers offer programs for the safe disposal of button cell batteries.

In conclusion, button cell batteries are small but powerful batteries that are used in a wide range of electronic devices. They come in a variety of sizes and types, and can be either disposable or rechargeable. While they are convenient and long-lasting, it is important to handle them with care and dispose of them properly to avoid harm to both yourself and the environment. view more.