5 of 11Image
Reduce screen timeout
Android phones will automatically dim and then turn off the display after a set interval. It's worth setting this interval as short as possible which will have a good impact on battery life.
Some Samsung Galaxy phones, like my Note 2, have another setting called Smart stay. This prevents the screen from dimming and timing out if it detects the user is looking at the screen. This is a great utility and makes it possible to set the timeout interval shown above to as short as possible. The screen won't keep turning off while you're using the phone, but will do so if you're not using it after a few seconds.
Don't forget power saving mode
Most phones have a special mode that can be toggled on to stretch the longest time possible out of the battery. Power saving mode does this through a number of techniques such as turning off different radios (wi-fi, Bluethooth) among other things.
Power saving mode has a significant impact on system performance so you don't want to have it enabled all the time. Instead, turn it on when your battery level is dropping low and you have a while to get through the day. Some phones have a setting that lets you program a battery level, say 30 percent, to enable power saving mode automatically.
Turn off phone vibration
Some folks don't realize it but having the phone vibrate for calls and notifications is a big drain on the battery. As nice as it may be to have the ringer turned off and vibrate enabled, if you need to stretch the battery life on a busy day then turn off the vibration.