The Advantages of Using a Portable Power bank Great when you don’t have any electricity or access to a plug. Their battery are high powered and can charge very quickly but still provide your device with a full charge, sometimes even twice or thrice or more depending on power capability. It attaches to a usb port and so can be re-charged through a laptop, or while in the car. This USB port also provides compatibility with any device as long as they have standard ends. Power banks are definitely convenient. After all, smartphones are important for all different reasons like checking up on the kids, calling in to work, or ordering pizza and we wouldn’t want to run out of battery. But of course, they are also not without their disadvantages that equally and neutrally need to be taken into consideration.