Here here https://linrunner.de/tlp/faq/battery.html#asus-laptops-stop-charge-threshold-isn-t-set-at-boot (sorry for link format, protection doesn’t allow new users to post links) is how to solve this problem in Arch. But I’m running Mint Cinnamon 22.
Does anyone know how to add this to initframefs to fix the TLP problem?