I used my gps for the first time yesterday and it drained the battery like I have never seen before. Is this a known issue with a fix? On a side note it did also lose gps signal several times. My note 3 did that as well and I cringed when this did it too.
When the GPS radio is active..... yeah.... that thing is a voracious beast. But it's that way for most any device out there. I was always puzzled as to why what amounts to a passive sensor is, by far, the biggest drain. I eventually found some info that kind of flicked on the lightbulb.
Remember, GPS is a very straightforward system; a bunch of satellites 12,000 miles up transmitting what amounts to clock ticks. A GPS device listens in on the signals and then uses them to triangulate your position. See, that last part is important. All this time I had been thinking in the wrong terms..... the radio isn't the problem... it's what it does with the data when it gets it.
Calculating your position from those radio signals takes a tremendous amount of processing power, and it has to do so constantly, several times a second. Now, combine all that processing with the fact that when it is doing its thing, your screen is most likely on, and running a map/location app (which are fairly power hungry in their own rights). It is a battery-eating perfect storm.