LTE phones are fast, but they can also suck a battery dry in a few hours. Nokia Siemens Networks did some preliminary studies on LTE phone’s power drain versus their HSPA (3G) counterparts and found that LTE devices consume between 5 percent to 20 percent more than previous-generation phones, depending on the application used. Those numbers, however, seem conservative compared to the anecdotal evidence.

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Why LTE sucks (your battery, that is)