Other tips for saving battery power

Hidden away in settings menus are usually plenty of options for disabling things like location services, push email, sensors or features that you never use, and more.
Most of these will make a minimal impact on battery life, but combined, they can become significant.
Instead of allowing email to be pushed to your phone at any time, why not change the setting to fetch mail every so often - maybe 15 or 30 minutes if you don't need to respond immediately to anyone.

Power-saving modes

Depending on your handset, you may find the manufacturer has provided power-saving features that go beyond anything available in Android (or other OSes) by default.
Enabling this mode manages the phone's various power-sapping features for you. It might, for example, prevents your apps from updating in the background, dim your screen, reduce the screen timeout setting, disable on-screen animations, and turn off vibration. By default, this mode usually turns on when your battery level drops to 20 percent, but you can set it to kick in at 30 percent instead. And the sooner the phone switches to this power-saving mode, the longer its battery will last.

Turn off non-essential notifications

It seems as though almost every app now polls the internet in search of updates, news, messages, and other information. When it finds something, the app may chime, light up your screen and display a message, make your LED blink, or do all of the above.
All of these things consume energy.
Admittedly you likely don't want to turn off notifications about new text messages or missed calls, but you don't need to be instantly alerted that radboy84 has just bested your score at Booty Blast. Turning off superfluous notifications will help your battery last a little longer, and it will eliminate pointless distractions throughout your day.

Watch Your Wallpaper

The most battery-friendly wallpaper is one that’s also the most boring: solid colors, with black being best. We know it’s tempting to download and set up a wallpaper that’s snazzy and features animations and bright colors, but producing all that pretty takes precious battery life. If you put your phone’s longevity at a premium, switch to an austere wallpaper that’s low on eye candy.

Organize Your Phone’s Home Screen

If you constantly find yourself flipping back and forth between your phone’s main menu to access your favorite applications and services, you’re using your screen much longer than you have to. Put all the stuff you access most often right on the initial home screen. That way, you can quickly access your stuff and minimize the amount of time that your phone’s display is in use.

Maintain Cool Temperature

Some of us might have observed that our battery runs out faster when our smartphones are warm. Put simply, don’t leave your smartphones under direct sunlight or in any place that is hot.
One of the more common occurrences would be leaving the smartphone in a car parked under the sun. The battery will function optimally in cooler environments, so do look out for, and try to avoid, scenarios where your phone is exposed to unnecessary and excessive heat.

Minimize Notifications

With constant connectivity to the Internet, we tend to get notifications on our smartphones all the time, be it updates on the latest news, emails, high scores from games, add-ons for apps etc. But I’m sure that you would only want to be notified on the more essential stuffs like new text messages, or messages from Whatsapp.
Not only is it annoying to constantly receive irrelevant notifications that can actually wait, it is also a powersucker for each of these notifications. Every incoming notification will light up your screen, make a sound alert or vibrate.
Manage your settings well and disable unnecessary notifications to save a little battery power (and avoid being frustrated with these constant notifications).