I have a Raspberry Pi 3 model B . It's powered by a DC adapter that outputs 5.1V and 2.5A. Although I consider ocassional manual reboots, I'm planning to use a Powerbank as some kind of UPS, after ensuring that it's capable of taking AC power to get charged and giving DC power to my Pi simultaneously. The powerbank specifications are the following:
» Input: 5V 1A from DC adapter
» Output A: 5V 1A
» Output B: 5V 2.1A
I usually run my Pi without mouse/keyboard/display (connect via SSH), just with Ethernet cable plugged-in and, occasionally, a USB stick to transfer some files.
My question is: Which of the two powerbank output ports is more suitable and adequate for my power consumption needs? I have read about Pi power requirements but I'm not sure which of these two ports would be better.