Disable the Wi-Fi – or use the 3G networks only when you need it. If you do not need the internet then simply disable your Wi-Fi – it consumes a lot of battery power.
Disable the Bluetooth – Even if it doesn’t “eat” a lot of energy, its applications do. Not to mention that an open Bluetooth makes you vulnerable to attacks.
Close the GPS – even if it’s not used in idle mode, when you launch an application that uses a service location, the GPS will start and it will consume power.
Close the equalizer – When you are listening to music on your smartphone, the equalizer lets you hear the sound mode you selected – this option “eats” a lot of battery power because the phone is trying to give more bass than normal.
Do not use vibration alerts – vibrations are caused by a little engine that consumes a lot of battery power. Remain strictly to audio alerts.
Battery saver applications for iPhone:
This application helps you know exactly how long will the battery hold when playing, listening to music or surfing the internet.
BatterySense from Philips Consumer Lifestyle
This application shows you how much time is left until your iPhone runs out of battery. Also, your application automatically turn off the Wi-Fi, Bluettoth, 3G, and other things that consumes more power.
Battery Doctor Pro
This application gives you very specific and clear information about how your battery is consumed in the state of “health” – it lets you figure out what in your phone consumes the most energy.
This application calculates how much battery in your phone is consumed by each service-so you can take action.
Battery Life Pro – All-In-1
This application controls the discharge power, shows you which applications consume the most energy and how you can minimize the consumption.
Battery saver applications for Android:
This application lets you check your battery state – lets you control settings like the screen, the GPS, Bluetooth and Wi-Fi.
Dr Battery Saver
Adjusts your power options for your Android phone. It lets you adjust the screen’s brightness and the standby time. This application closes all background applications that work just to consume energy.
Advanced Task Killer
This application closes the tasks that do not use at the moment and so you save battery power.
Super Box aTool cache battery
This is the best battery saver application for Android. It stops your unused functions, closes unwanted applications and it checks and controls the energy consumption.
This is a complete set of control over the energy consumption and lets you set your device so it consumes less power.