Power banks are portable charging devices that allow you to charge your mobile phone and other devices via USB. They are an excellent solution to the common problem of short battery life on mobile phones, especially when charging stations are not readily available. With a power bank, you have the convenience of being able to charge your mobile phone anytime, anywhere. Power banks have a certain number of charging cycles before they need to be recharged, which varies depending on the number of devices being connected. The capacity of a power bank, measured in milliampere-hours (mAh), can provide hundreds of cycles of charge before needing to be replaced. Additionally, many power banks come equipped with multiple ports, enabling you to charge different devices at the same time.