The AndroidTM Mobile Technology Platform was conceived such that the device can be woken up from suspend triggered from applications (ex: check emails every 10mn). As a consequence if you have network applications running in the background (that are auto launched at boot) that are network hungry (ex: checking the weather every 2 minutes) this will have an impact on the battery drain. If you are not using the Wi-Fi, shut it off. A screen set to maximum brightest also drains energy from the device. Set your device as well to have its screen go off after 2 minutes or less of non-use. These things will help your battery conserve energy.
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