Download PowerMax & Pro License Key v1.8.8 APK. PowerMax - maximize your battery life! PowerMax extends the battery life of your mobile device. Simple to use: just push the button. PowerMax is a mobile application that will help you extend the battery life of your mobile device. When you're on the go and notice that your mobile is about to die, or if you know it's going to be a long day until your next chance to charge, one touch activates PowerMax. PowerMax will save your battery and better manage power usage for you.