First, check how much battery each app is using in Settings  (or) > Battery .

Stop any unused wireless connection (Bluetooth®, 3G / 4G, WiFi, GPS).

Decrease the screen brightness and the screen timeout time. 

The later versions of Android™ better manage applications running in the background. However, some of them require specific features. For instance, a weather widget requires a data connection (3G or WiFi) as well as an access to GPS to update its information. If you do not really use these applications, it is recommended to uninstall them. 

If the curve of your battery consumption reveals a peak down despite using the tips above, you can try to reset your device and use it several days without installing third-party applications. If, however, the battery consumption seems incorrect, please contact our after-sale service for a repair or replacement.