Updating Controller Without the USB Cable??

Nope. You need a USB cable. But if you have those smartphone. You can used it to connect ur controller to ur XB1. I hope I help you in this subject.

Hi There,

Did you try updating via wireless?

An Xbox One Wireless Controller purchased in or after June 2015 can take updates wirelessly without connecting via USB cable. This controller has a small, circular 3.5-mm port on the bottom of the controller;
controllers without this port must update via USB cable.

Link: https://support.xbox.com/en-CA/xbox-one/accessories/update-controller-for-stereo-headset-adapter

Hi, Austin.

After performing the update, does your controller turn on without the USB cable, or this behavior didn't change?

Have you checked to see if your controller needs a firmware update? Older controllers (eg without 3.5mm headset jack) may need to be connected via USB cable to update the firmware.

Please try and use a Micro USB Data cable and connect your controller to the console via USB cord.

Make sure it's a USB Data cable, as some USB charging cables for smartphones do NOT have the necessary data lines connected. Only power lines for charging the phone.

Remove the batteries from the controller for the following tests!!!

Then test if the controller is fully updated in the Xbox Accessories app.

Check if the controller works for long play sessions without "disconnecting".

If the controller works flawlessly with the USB cable, unplug the cable from the console and plug the USB cable into a USB power bank or USB charging port.

Check if the controller still works wirelessly without disconnecting.

Since you say you already replaced the WiFi board and both controllers disconnect at the same time, it could be that you have wireless interference in your vicinity.

Maybe a neighbor with a wireless baby monitor that gets switched on at that time. Or maybe they have a powerful microwave oven that interferes with your wireless signals.