Activate power save mode above 20%?

[thi]

Is there a way to activate power save mode while the battery is above 20%. I mainly want it for going colorless at night.

 

[jerseygirl]

I charged mine to 100% then set in ultra power saving mode with no problem. Woke up to phone still at 100%.

 

[Mohammed Abib]

Such a smart tip! I'mma do that every night, but just before closing my eyes off to sleep :d .. when I finally get my SGN4 :/