Solders, accessories, and batteries are all products that are commonly used in electronic systems. Solders are materials that are used to join two or more metal surfaces together, typically by melting the solder and allowing it to flow and solidify between the surfaces. Accessories are products that are used in conjunction with electronic systems, such as cases, power supplies, and other components. Batteries are devices that convert chemical energy into electrical energy, and are used to power many portable electronic devices. These products are essential for a wide range of applications, from basic electronic prototyping to complex industrial systems.