Thanks SG! Do you happen to have the dimensions of the bottom nest?
I ended up buying Antigravity ATX-12 HD RS instead because I found it wasn't too expensive for a lithium. It cranked the Z right up
Ended up designing my own adapter based off the stock battery size and I stole your idea of using zero top/bottom layers and only having infill. Saved me a ton of filament and made the infill .9mm wide. (triangle pattern).
I can also make a few designs for others to adapt small batteries to the stock battery size, with a top piece and a bottom piece. Just need to know LxWxH.
Main issues I had were realizing that bottom nest is several cms larger than the stock battery,