Android 5 (CM 12) energy-saving mode – setting the data connection


I have run a Galaxy S4 (G-I9505) with a Cyanogenmod 12th Since the battery very quickly goes down, I have the
Device only in the energy saving mode in operation.

The problem with the thing is that then apparently also the data connections are deactivated and messages (Whatsapp, SMS) not be retrieved automatically.

Only when I just turn on the screen to determine, for example, the clock, it retrieves the messages.

However, calls come through.

Unfortunately, I've been nothing found on the net or I lack the right keywords.
I hope you can somehow help me.

Many Thanks!

Hello hh!

I've moved your thread one floor below in the root area. :)

well hopefully it reads then anyone here :)