I have already taken RPI 3 B + from post office and now I want start RPI 3 B +. But I'm seeing that I haven't got 5V 2.5A Power Block. So, I have a question. Can I give power 5V 2.1A to Raspberry Pi 3 B +? Please, help me and say can I do it? Best Regards, Mammadli Elnur.

1 Answer 1


That should be okay. I use my Pis headless (without keyboard and display) and use any 5V supply I can find.

  • Okay, But How can boot the OS to it if I shouldn't use keyboard?? Dec 10, 2018 at 17:37
  • And can I use HDMI and connect it to TV?? Dec 10, 2018 at 17:38
  • As Joan says. Disable Bluetooth to save a little power. Dec 10, 2018 at 17:38
  • HOW???????????? Dec 10, 2018 at 17:41
  • 2
    @TheFnafException have you actually tried to use your power supply?
    – Dirk
    Dec 10, 2018 at 17:58

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