Power Bank

A power bank, also known as a portable charger or external battery pack, is a portable electronic device designed to store electrical energy and provide it to other devices when needed.

1. Input Port: The input port is where the power bank is recharged. It usually has a USB Type-C, micro-USB, or Lightning connector to connect to a wall charger or computer.
2. Output Ports: Power banks have one or more output ports where you can connect your devices for charging. Common output ports include USB-A, USB-C, and micro-USB. Some power banks may also include other connectors, like Lightning, for Apple devices.
3. Battery Type: Power banks typically use lithium-ion or lithium-polymer batteries due to their high energy density, compact size, and relatively lightweight properties.
4. Capacity Indicators: Many power banks feature LED indicators to display the remaining battery capacity. These indicators help users know when it's time to recharge the power bank.