A power bank is a portable and rechargeable device designed to store electrical energy and provide a convenient way to charge your electronic devices on the go. Whether you’re traveling, working, or in need of a quick power boost, a power bank allows you to charge smartphones, tablets, laptops, cameras, and other USB-powered devices without the need for an outlet.Power banks come in various capacities, typically measured in milliampere-hours (mAh), which determines how much power they can store. With higher mAh ratings, power banks can charge larger devices or provide multiple charges for smaller ones. Many power banks feature multiple output ports for charging multiple devices simultaneously and are equipped with safety features like overcharge protection, short-circuit prevention, and temperature control to protect both the bank and the devices being charged.