Costs a lot of power to use bluetooth and GPS. Screen is a hog as well, but GPS is pretty bad because you're using processor, GPS antenna, mobile data and then bluetooth to transmit to your sena. This can be mitigated with offline maps, but only so far as data usage. I hope it works out for you, I'm not trying to shit in your oatmeal, I just have been using wireless charging since the note 3 and have a pretty good idea of its capabilities.