You think that, but every iPhone and Android phone says otherwise that has a lithium ion battery. It’s built in their OS as a feature to ensure longer battery duration long term. Unless Apple, Samsung, Google are all doing it for a myth… I have my doubts. They essentially set it to go to 80% then slow charge to 100 the last bit before you wake so it won’t sit trying to restart charging from 99% to 100% for hours