Android L practical small function charging time long reminder

The "Android L First Experience" article mentions many changes in the new system and how it feels to use it, but there is a small new feature to be said simply. The original Google in the Android L lock screen has added a very loving function, that is to show how long the user's mobile phone can be full of electricity. The implementation, the user from the set into the battery bar to see more specific battery use information, such as the current percentage of electricity, the length of charge, as well as the last full after the use of electricity and so on. In addition, the previous Google said the new system has a great boost to the device's endurance, but from the experience of many Nexus 5 developers, the promotion is not obvious, perhaps this is the reason for the preview version.