The Motorola Moto G (2nd Generation), also known as the Moto G2, is the 2014 successor to the Moto G. The Moto G2 is equipped with a 5-inch 720p display and a Qualcomm Snapdragon 400 processor. Model numbers XT1045, XT1040, XT1039, XT1069, XT1068, and XT1064.
A possible reason for this could be that there is an app running in the background, if so then you will want to turn off the app. You can also turn off the wifi and mobile data, this should help lengthen your battery life.