Short battery life is one of the most commonly complained about issues when it comes to smartphones and devices that run Google's Android mobile platform are no exception. The best remedy is to tweak settings for a number of different functions of the phone, such as Wi-Fi, 3G and display. However, to save yourself time, there are plenty of free apps that will help you adjust these settings quickly and easily. Here's five free apps that help boost the life of your smartphone battery.

Battery Dr saver+a task killer

This app offers you a list of running tasks you can kills to ensure you get the most out of your Android device's battery. It also shows you the battery power left.

Super aTool Box-cache battery

Among the different functions in this app is a battery booster that allows you to adjust your phone's seetings to get the most power possible.

Android Battery Doctor

Android Battery Doctor claims to double the life of your handset's battery by freeing up critical CPU resources. It also features a one-click turbo boost.

Battery Booster

Not only does this app feature a Battery Tweak, function that allows you to switch to Smart Battery saving mode and offer convenient one-click settings to get the most from your handset's life, it'll also provides accurate information on your battery's life including an auto-updating live chart that tracks your battery usage. Not bad for free.

JuiceDefender - battery saver

JuiceDefender features five preset profiles that will manage the most battery draining components, like 3G connectivity and WiFi to ensure you get the most out of your battery's life.