Power supply for multiple boards

I’m looking to power multiple boards using a single, multi-port, USB charger. Two Jetson Nano Dev Kit and one Raspberry Pi 4 (4GB). Are there any chargers able to do this?

Is 5V 2.4A per port enough? Those are the only ones I’ve found. Are there higher power USB chargers?

Hi, power supply to Jetson Nano should be 5V.

Hi, sorry. I meant 2.4A 5V.

5V, 2.4A is fine for not heavy load. Please refer to this guide for power supply option: https://developer.nvidia.com/embedded/dlc/Jetson_Nano_Developer_Kit_User_Guide

Assuming your power bank is capable of actually keeping the voltage > 5V when each port draws 2.4A, and assuming you’re using high-quality USB charging cables that don’t drop the voltage too much, then yes, that power bank could do it.

An alternative is to use a separate battery, and a separate DC/DC converter for each.
You can power both the Jetsons and the Raspberry Pi through pins 2/4/6 on the 40-pin GPIO header.
Thus, you could hook “big battery” -> 3 separate 5V/3A DC/DC regulators -> 3 separate boards.
Just make sure you get a good undervoltage warning/cut-off device for the bigger battery, if it doesn’t have one built in.

This is a three-cell battery at 5200 mAh, so it’s the same energy content as a 15600 mAh USB power bank: https://amzn.to/31Lo25Y
These are regulators that output adjustable voltage; you should adjust them to 5.15V using a Volt meter: https://amzn.to/2KOc8li
Alternatively, these are 5V regulators that output USB: https://amzn.to/31KgCAc
This is an undervoltage warning device: https://amzn.to/31PckaR
Add some thick DuPont connector wire and some soldering and you’ll do great!