A power bank is a portable device used to charge electronic gadgets such as smartphones, tablets, and other USB-powered devices. It consists of a battery inside a case with circuitry to control power flow. Power banks are charged via USB connection to a computer or wall adapter and then used to recharge devices when no other power source is available. Power banks come in various capacities, typically measured in milliampere-hours (mAh). The higher the mAh rating, the more charge it can store and the more times it can recharge a device When choosing a power bank, consider the capacity, the number of output ports, the output current (measured in amps), and additional features such as fast charging, wireless charging, and built-in cables.
Power banks have become increasingly popular due to the growing reliance on smartphones and other portable devices, particularly in situations where access to electrical outlets is limited or unavailable, such as during travel or outdoor activities.
