Here is a super easy and slick way to run your Starlink Mini off of a Dewalt 20v lithium battery. Literally just slide a battery into the holder like you would any drill, and then slide it into the Stalink Mini. It couldn't be any easier. Also has 2 USB-A ports and one USB-C port to also charge your phone.
This does have low voltage protection so it won’t over-discharge your batteries.
Starlink Mini and battery are obviously not included.