I found this article pretty interesting.
As you can read, when it's about small battery cells the nasa has the same limits we all have!
https://www.linkedin.com/pulse/mars-helicopter-ingenuity-deep-dive-its-6-pack-damien-frost
While I was at Qualcomm I worked on the Atlanticus program for a while; that program supplied the controller for Ingenuity (based on Qualcomm's Snapdragon phone processor.)