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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.

Smart phones are just amazing except the fact that it's battery drains really fast. There are few reasons that I learned. from reading different articles and I want to compile it and share it with you with a some very easy explanation. Android System runs different application even you need it or not WiFi, Bluetooth, and other connection Sounds, vibrate, screen brightness Weak cellphone signal - your phone keeps on seeking a good signal and makes it tired. Lithium Ion batteries will not perform well if it's exposed to heat The battery is too old

Last week, I bought the one of the cheapest smartphone in the market, Lenovo P700. Its amazing 2500MAh battery convinced me to buy it, which is higher than Samsung S3 or iPhone 5 . Because of that, I expect a lot for a high end battery performance. As I use my phone, I noticed that the battery drains fast even on stand by mode. I observed it for few days believing that it's only a battery cycle stuff but there is no improvement and there is no such thing on Lithium Ion batteries. I searched the internet on the reasons why this is happening to a 2500MAh battery. I found out that Android 4.0 Ice Cream Sandwich has some bugs related to it's battery. I didn't search on it a lot because of some technical terms that I need to know, instead I joined forums about Lenovo P700 and read articles about Android 4.0. Including  Why Android Phone Battery Drains Fast? My problem falls under the fist issue in that article. It's a system problem. There is something that runs du