Connect the devices to a powered USB-A hub or secondary power source.

Thanks for replying, 2Bumblebees, and that additional info, it really helps! Based on this info, this Apple resource and positioning maybe helpful:

"Some devices need more power than your iPhone, iPad, or iPod touch can provide. If you connect one of these devices, you might see an alert that says “attached accessory uses too much power." Try one of these steps: 

• Connect the devices to a powered USB-A hub or secondary power source.
• Use a Lightning to USB 3 Camera Adapter.

The Lightning to USB 3 Camera Adapter has a built-in Lightning port, which you can connect to a USB-A power adapter. This provides power to your iOS device and connected device."

Use Apple USB-A camera adapters with other USB-A devices

Have a great day and thanks for using the Apple Support Communities!

Hello 2Bumblebees,

It looks like no one has responded to your question. Here are a couple things that might help others answer your question:

1. What iPhone model are you having this issue with?
2. What is the exact message you're seeing?
3. What iOS version is installed on this iPhone?

Please provide as many details as possible and thanks for using the Apple Support Communities!