Why Your Android Phone don't have a Deep Sleep State?
Let me explain what a Deep Sleep means. It's a state where your smart phone is not busy thinking about the applications that you use. This is essential, it you phone don't have this state, it will drain your battery. Here are some reasons that I observed. Internet connection through WiFi or data connection is active. If you're using Lenovo P700, the screen lock option was set to none. It should be set to slide or other option. Read How I fix my Lenovo P700 Deep Sleep issue and see how to check if your phone is in Deep Sleep state. There are sync happening on your apps like Facebook or twitter. Proximity sensor is active You may add more just leave a comment below.