I didn't use the phone and forgot it for a while.
Yesterday I saw LED notification and checked.
With Airplane mode on but Wifi on I had 50% left after 210h !
Estimation time for usage is +316h!
I can't believe, but it's true. With original LG Kitkat and nothing changed (means bloatware all there etc).
Thanks, LG. Good job !
If you want to check you can have a look at my pictures I made:
(Limited number of accesses because of my provider)