Update on CM11 , 17th Dec Nightlies.
Battery life on moderate/semi high usage (no gaming, all other social apps like fb and G+, skype , whatsapp like mad and calls are in use.
Bear in mind, i dont let notification come through on fb and g+ but i am usually always on the app all the time.
My battery is like 20 hours plus and 4hours 45 mins on screen time and battery is at 4 %. its pretty good and this is the 2nd day of usage.
On the first day i also got better battery life then stock at 20 hours and 4 hours 15 mins on screen.
my wifi is always on so is my data.
PS: I dont know , but i guess Cyanogenmod's kernal is modified so i can full change my phone in 2hours tops compared to the usual 2.hours 20 mins plus on stock 4.4.2
very awesome ! i might join cm too after get bored with stock..