Powerbanks are portable devices that are meant to help you charge your smart devices on the go. Due to their portable nature, they are best to use when you don’t have any major power supply available around. For instance, you can use them during hiking, or long trips where you don’t have access to a car or a power socket to charge your devices. Powerbanks are also helpful if you are out camping or travelling and the battery of your mobile is about to die.