Oppo
Disable Automatic Power Saving Shutoff After Charging auf Oppo
ColorOS links Power saving mode to your charge level. Once the battery hits a set threshold, usually around 60 percent, the system assumes the phone no longer needs power restrictions and switches the mode off on its own.
This behavior comes from a separate toggle inside the power saving settings, distinct from the main Power saving mode switch. If you depend on constant power saving, for example on long trips with unpredictable charging spots, this automatic reset can undo your settings without any warning.
To stop it, open Settings ➔ Battery ➔ Power saving mode ➔ Turn off automatically and disable the option. Power saving mode then stays active until you switch it off yourself, regardless of battery percentage.
Keep in mind that turning off the automatic shutoff also keeps background restrictions, refresh limits, and reduced performance tied to power saving mode running after charging finishes. If you actually want the mode to lift once the phone is charged, leave the automatic shutoff enabled instead.