Battery life decreases faster when Battery Saving mode is on

[FourTonMantis]

It sounds strange, but I notice, that battery life percentage decreases faster when Battery Saving mode is on.
When I'm sleeping at night I usually leave my phone with wi-fi on (I also never turn off Location services and Mobile Data) and Quiet Hours on. At this state the battery percentage falls down with 2-5% for a period of 7-9 hours until I wake up.
I made some experiments and turned the battery saving mode on for two nights. The result was about 10-12% decrease for the same period of 7-9 hours!
Does anyone else experience similar behavior?

 

[Munter2]

It sounds strange, but I notice, that battery life percentage decreases faster when Battery Saving mode is on.
When I'm sleeping at night I usually leave my phone with wi-fi on (I also never turn off Location services and Mobile Data) and Quiet Hours on. At this state the battery percentage falls down with 2-5% for a period of 7-9 hours until I wake up.
I made some experiments and turned the battery saving mode on for two nights. The result was about 10-12% decrease for the same period of 7-9 hours!
Does anyone else experience similar behavior?

Yes, that is a common problem that I've also seen with my 925. It seems that particular app actually drains the battery a little every time it checks to see if it should turn itself on and the end result is your battery runs down sooner.

 

[FourTonMantis]

That makes sense. I'm suspecting WhatsApp or Skype...