A portable device that stores electrical energy that may be used to charge electronic devices such as smartphones, tablets, and laptops is known as a power bank. Power banks generally contain a rechargeable battery that can be charged using a wall charger or USB connection and then used to charge other devices while on the road.

Power banks vary in size and capacity, from small ones that fit in your pocket and offer a single phone charge to bigger ones that can charge numerous devices many times before needing to be recharged. These are especially handy for persons who often travel, spend extended periods of time outside, or have restricted access to electrical outlets.

When purchasing a power bank, make sure to consider the capacity and the number of ports, as well as any additional features such as fast charging, wireless charging, or built-in cables.