Portable screen with internal battery?

[Wolf_Lbh]

I go hiking a lot and need a screen to use as a second display from my phone (I use the phone's display for discord and the monitor for the game played in desktop mode) the screen I'm currently using is simply too big but I'm having trouble finding something smaller that has all the features I'm looking for.
1) Usb c charging
2) Usb c video input (this way I can charge my monitor and phone while I use them via battery bank which is essential for camping)
3) Decent sized internal battery on the monitor
4) 7-10 inches in size.

My current monitor is: https://www.amazon.com/dp/B09G2WHMHD and it checks all my boxes except it is too big(internal speakers not required, I use wireless earbuds). Having trouble finding any solution in a smaller size. Maybe some kind of Ras pie screen?