Battery draining even on standby with widgets offline

Hello

Recently, i've noticed my battery draining really quickly, even if i'm not using the phone and even if i activate the power save mode.

I only have whatsapp installed.  WLAN is off.   Only 2 mail widgets running on 30 mins frequency.  All widgets set to offline.

According to battery monitor...  after every 20 mins i'm losing 2 or 3% even with power save mode activated.

It only suddenly became like this few days ago, as i recall i didnt' install any new apps, other than updating OVI maps, but i never even use ovi maps at all.

Nokia profiler shows my CPU usage at 30-50% even when i'm not doing anything.  What could be the probleM?  I tried uninstalling whatsapp,  makes no difference.

Thanks!

its just a suggestion, as this happened to me, but i noticed my battery drains twice as fast if im using a brightly coloured or pictured theme that changes the icons. I had no idea themes used power but they do. Now i only use dark themes that utilise default icons.
Just a thought.

whatsapp does not have an offline mode so whichever priority you've set it to connect to first (WLAN or mobile internet) it will always be connected, this drains a lot from your battery.