RM-500 External Battery?

[KDCMavic]

Hi, has any figured out a method to extend the usage time of the RM-500 Smart Controller?
Either by external battery attached to the back of the controller?
or by using the Smart Controller Extension Module that is on the RM-500-ENT.

Granted, I could use a fast charge power brick in my pocket with USB cable to bottom of controller.

Any constructive thoughts?

 

[mavic3usa]

For sure, the quickest and easiest and cheapest way to do this is with a inexpensive, reliable, modern Anker power bank that can be used with other equipment as well.

https://www.anker.com/collections/power-banks?ref=naviMenu