Four power saver steps are necessary:
o By following the steps from the phone menu: settings-about-battery use, the device is able to tell what application is using what power ratio. The display often uses much.
o Reduce power usage from connections. First, You can specify for 2G data usage whenever you do not need high speed data Second, you can turn off the wireless feature if not required. Third, you should turn off Bluetooth whenever you don't need it Fourth, turn off the GPS.
o Reduce display power. This can be done by one, reducing the brightness of the screen, a feature that consumes much of your device's power. Secondly, in case the device has the AMOLED display, always set the background to black. Third, always set the screen timeout to minimum possible length.
o Change other features. You can turn off the vibration function, install applications responsible for power management, especially in android 2.3, stop applications when not needed, ensure the phone is in standby mode when not in use or even on airplane mode while on flight.