As an experiment I uninstalled the following apps from my phone (on there but not used very much)
Three inTouch (wifi calling, SMS)
Before with moderate use (3 hours SOT) my phone would need a charge after 17 hours and after making the changes above my phone hit again 3 hours SOT but 43 hours stand by time which is a massive improvement.
Phone is stock, not rooted (anymore) with no stock apps frozen or disabled.
Google now is on, location reporting is off, wireless off etc.
LG G3 16Gb
Sony Ericsson T28s, Nokia 8210, Sony Ericsson T68i, Nokia 6100, Samsung V200, Samsung D500, Sharp 802, HTC Diamond, LG Viewty, LG Prada, Orange SPV, HTC HD2, Nexus One, iPhone 3G, iPhone 3GS, Nexus S, Samsung Omnia, Samsung Galaxy SII, iPhone 4, iPhone 4S, Nokia Lumia 920, HTC One, Sony Xperia Z1, Nexus 5 (LOST), iPhone 5S