Originally Posted by charlie310
Sorry, but HSPA+ is 4G,
No, it isn't. HSPA+ is an extension of 3G, hence why older phones can use it (e.g. my SGS2 had it). 4G/LTE is a different radio interface.
On topic, I have LTE, 36% left, 18hrs 15mins on battery, 2.5hrs screen on time, but I use Voltage Control underclocked @ 1350MHz