Doze For Non-Marshmallow Devices
Android marshmallow is still new and only on a few devices. One of its best feature however, is known as doze. Doze is a feature that will drastically save battery life when the device is sleeping. This is great for people that need a lot from their phones or forget to plug in at night. However, this is not a feature found in older versions of android and this is where the doze app comes in. this app blocks the data and helps to conserve battery life much like the doze feature in android marshmallow. The app can be found in the play store going by the name of “Doze - for better battery life” this app will add the for mentioned features to any android phone running 4.1 and higher.
There are simple steps to set up and the app works grate, it does require you to set up the app as a vpn as that is how it will block the data but that is a small task for battery saving goodness.
You can grab it from the link below and test it out for your self