Portable chargers, also known as power banks, are compact devices designed to store electrical energy for charging electronic gadgets on the go. They come in various sizes and capacities, allowing users to charge smartphones, tablets, and other devices without needing a wall outlet. Most portable chargers connect via USB cables, making them compatible with a wide range of devices. These chargers are especially useful during travel, outdoor activities, or emergencies when access to power sources is limited. Many models feature multiple charging ports, enabling users to charge several devices simultaneously. With advancements in technology, some portable chargers even support fast charging and wireless charging options.