I am interested in buying Pi 3 for a hobby project, my idea is to put it in my car(i know i can use power from the car battery, but that is not the idea of the project).
I have been looking through power banks and i have found few which output 5V/2A, will that be enough to power and sustain Raspberry Pi 3?
As goldilocks has said below, the power bank must really give 5v/2A under load and not just charge at that amperage. The following should be interpreted with that condition:
It depends on what the Pi will be doing. If you are just running the Pi by itself then it will be fine(The foundation recommends 2.5A but I have used mine with 2A just fine).
However, if you have it plugged into a screen, have Bluetooth/Wifi running or are powering some external devices you will need more power.
My solution for those situations is to use a 5V/3A UBEC with RC batteries. Whatever battery you use will always give enough current for your project. Then all you need to work about is getting a battery that will last long enough.
