A portable power bank is essentially a special battery in a sturdy case with a circuit which controls power flow. Power banks allow you to store up electrical energy which you can then utilize at a later stage to power up devices whenever you need to. They’ve become increasingly popular as well as powerful over time as more and more people are traveling with their electronic devices but also as the battery life of those devices gets outstripped more frequently due to the fact that we all just spend so much time on our screens. By having access to a convenient and portable source of power you can top up your devices even when you are far away from a wall outlet.\r