Battery PacksA battery pack is a set of batteries that are connected together to provide a higher voltage or greater capacity than a single battery. Battery packs are commonly used in portable electronic devices, such as laptops, smartphones, and digital cameras, to provide a long-lasting power source. They are also used in other applications, such as electric vehicles, power tools, and emergency backup systems, where a large amount of energy is needed. Battery packs can be made from a variety of different types of batteries, such as lithium-ion, nickel-metal hydride, or lead-acid batteries. The type of battery used in a battery pack depends on the specific application and the desired performance characteristics.