The apps which we are going to discuss now show the stats of battery usage. (gizcentral.com)
For those that are still worried about battery, the USB connection option will be a great option and cut down on battery usage since the phone can charge at the same time. (androidheadlines.com)
The other change is with the notification centre where Lava shows the current CPU usage graph along with RAM and battery usage graphs. (techpp.com)