It seems that when Moto x try to use Sprint network, the battery drain so fast. My Moto X battery use 10% in 2 hours without WIFI, but only 3% in 2 hours under WIFI. Also, if you take any picture or video, the google app are starting to upload into the cloud. it also cost a lot of power. Any idea about saving battery life besides the official document showing in Moto X help page?