A while ago I've rewritten TRMNL's Kindle-client from Bash into Lua, optimised it a bit and when doing a refresh every 5 minutes, my Kindle Paperwhite 10th gen now lasts about 5-6 days on a charge.
https://github.com/mbirth/trmnl-kindle/tree/lua-rewrite
awesome work! the original Kindle project definitely has quirks, so we now offer a KOReader option as well. https://github.com/usetrmnl/trmnl-koreader/
awesome work! the original Kindle project definitely has quirks, so we now offer a KOReader option as well. https://github.com/usetrmnl/trmnl-koreader/