PSA: Steam Deck *does* allow a slow discharge, and the battery life is safe being left on the charger (e.g. overnight) ( help.steampowered.com )
A reminder of Valve’s FAQ, given recent article on Websites trying to contradict (e.g. slashgear.com/…/steam-deck-plugged-in-overnight/):
If your device has been left on the charger for long periods of time, it may report less than 100% charge. This is normal. We allow the battery to slowly discharge after long periods of time under charge to optimize long-term battery health.
