Sorry for interrupting you guys.. Im currently facing issues with battery, my MacBook 7,1 on Mojave beta 4 is draining battery so fast. (watching youtube, browsing web etc) on Mojave lasts 1:30h.. On High Sierra is about 5hours. In monitor activity is nothing hogging cpu. Does anybody know why?
Or you got a malware on Mojave or your battery is becoming faulty.
In monitor activity you should look at mainly the kernel_task pid in Memory Tab rather than CPU Tab.