With all new technology, there also comes compromise. Such seems to be the case with VoLTE (voice over LTE) technology. In news that’ll have nearly all smartphone owners cringing; a recent test that consisted of an unknown device making both CDMA and VoLTE calls over an unnamed carrier revealed some interesting results. It was found that VoLTE calls generated 100% more current drain on the battery which in turn resulted in 50% less battery life. Granted, this is just the beginning stages of VoLTE technology, and we aren’t 100% sure of all the variables in the test. However, I think we can assume that much of 2013 will be spent by engineers making sure we don’t lose 50% of our battery life with this technology.
source: Droid Life