This question is an exact duplicate of:
I have an RPi B and using a USB hub need to plug into it:
- A LogiLink Wifi nano USB, and
- 3 USB NFC readers (3*200mA=600mA)
This should roughly add up to less than 3A:
Power for: (RPi) + (USB Wifi) + (3 USB NFC) ~ 2.5-3A
I want to use a mobile power source like a power bank, but all I see are up to 2A.
- Can I power the RPi through the USB with 3A or is there a limit at 2A?
- Are there any powerbanks that could give me 3A?