A power bank is a portable charger that allows you to charge your devices, such as smartphones, tablets, and laptops, while on the move. It stores power in a rechargeable battery and comes in various capacities, measured in mAh, which determines how many times it can charge your device. With fast charging capabilities, multiple output ports, and built-in safety features like overcharge and short circuit protection, power banks are essential for staying connected when no power outlet is available. Ideal for travel, outdoor activities, or emergency power needs.