BlackBerry Z10 battery issues

Hey, something is terribly wrong with my z10. The battery is dying in a phenomenal speed. From 100% to 35% in już over two hours. The system monitor shows that the System is draining about 50% during that time. My z10 is a stl100-1, BBOS 10.3.2.2474.

Anyone experienced this kind of issue? Anyone maybe has an idea how to solve that? Like 2-3 days ago the battery was OK, lasting for 10-15 hours, but now it's unusable. No updates during that time, no new apps installed. It's really weird.

Posted via CB10