Smartphones are known for zapping their battery power pretty quickly . However, most handsets, including Google Android devices, offer a battery usage option that displays which services or functions of the phone are using the most battery life. Here’s how to view your battery usage statistics.
Work out what's draining your smartphone's power
Press the Menu button on the home screen and select Settings.
Select About Phone and then select Battery Use.
The handset will now display statistics that depict which function or service on the phone is using what percentage of the battery. Make a note of the aspects that use a lot of power and adjust them accordingly.