There are adaptors to provide USB power via powertool batteries. Think most brands have one.

Eg Dewalt's

https://www.dewalt.com/products/accessor...r-source/dcb090

And if want 120v output, from 4 powertool batteries...

https://www.dewalt.com/products/storage-...harger/dcb1800b



Edited by Ren (11/10/20 02:28 PM)