The bottom line is if 4g is killing your battery quick its because where you are there isnt a strong enough 4g signal. If you're phone is barely getting a bar then the radio is constantly trying to connect to 4g and that radio WILL kill your battery fast. On the other hand look at mine.
FYI these are from inside of my house
As you can see I have a very strong signal.. I took my phone off the charger at 6:27 am.. it's now 10:13 which is almost the 4 hours people are claiming to get and I still have roughly 85% of my battery left.
Speedtest from inside my house
Few apps
Tapatalk
FYI I have atk set to aggressive kill every hour