I’ve had my Steam Deck since last June, and noticed the battery would drop from “full” when plugged in to 95% as soon as I unplugged it. I tied the calibration method Valve recommends, but also realized when I check the Battery Health in desktop mode/settings, it’s at 88%…which does seem odd after just one year? Curious to hear how others’ devices are holding up.
This is normal for the Deck and is done to help extend battery life. Keeping a battery at 100% charge for extended periods accelerates its degredation. The Deck will charge to 100%, and you should see this if you immediately take it off the charger as soon as it finishes charging, but then lets it drain down to about 95% and maintain there if you just leave it plugged in.