The Android Settings menu options provide high level measurements of battery drain. However, to gain more insight into battery consuming apps, there are some tools that can be useful. Tools such as Batterystats and Battery Historian come in handy. Batterystats collects battery data from your device, and Battery Historian converts that data into a HTML visualization that helps you understand power consumption graphically.
Batterystats, was introduced in KitKat, but Lollipop brought a large dataset for the users which included data about every Wakelock action on the device.
Please reset the data and enable full Wakelock reporting to receive comprehensive information including how the device utilizes the battery, along with details about all the running processes.
Here are some of the commands you can run after connecting your device:
adb shell...