This is why when we are hit by a low battery signal, we get worried. This is because we need to keep in touch and makes our plans, connecting with the world all the way. It is at such time that an outlet comes in handy. A wall charger can be useless, especially if you are on the go. In addition, you may decide to charge using your car, but then you will have to sit in there if you still need to use the phone.
To avoid time wastage and the frustration that comes with a low battery, then the power bank is the most sensible solution. When you hit low power, you simply take out the outlet and continue charging without having to put your life on hold and avoiding all those interruptions. You will remain connected regardless of what you want to engage in.