Marshmallow has two cool features to lengthen your battery life. First, it automatically puts unused apps to sleep. Second, it detects when you aren’t using your phone and stops using data at that time.
But what do you know? You already have a couple apps that will do the same things! You need to download Greenify and JuiceDefender.
Greenify’s auto-hibernation mode (available on Android 4.1 or newer phones) will stop updating apps you aren’t using and prevent them from slowing down your phone.
Download: Greenify for Android (Free)
JuiceDefender – Packed with smart functions, it automatically and transparently manages the most battery draining components, like 3G/4G connectivity and WiFi.
Download: JuiceDefender for Android (Free)