I would reccomend getting and plugging in a small solar panel that can provide a 5v charge to the camera. I currently have this one installed on one of my cameras thats way up in a tree.
https://www.amazon.com/dp/B083GSHZ6R/ref=cm_sw_r_cp_api_i_SlkvFb8WEWZFK
Someone else used the solar panel from Ring to connect to their 2C camera and can be seen Here