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Hi, every one today I am share a great android app which is most helpful for everyone who use android phone. This is powerful apk for android which is completely free to download all android devices and smart phones. Battery doctor is free battery saving app that can extend your battery life up to 50% by finding apps and settings that drain power on your device. Join 330+million users on android. This amazing apk can download for your android  click here to free download. It has include lots of battery saving features which can easily extend your battery life quickly.