To find the additional Battery characteristics you should install DetailedBatteryUsage tweak. And then go to Settings → General → Usage → Battery Usage. Here you can reveal much more information and make a detailed analysis then from basic battery menu. Maybe for the general user this tweak will not be useful. But for persons who really get in touch with its work can discover a lot of valuables, find the detailed look of battery life line graphs. DetailedBatteryUsage tweak lets you to observe in-depth details on each app on your device, unlike the stock consumer battery usage menu. Just click on the app that you want to observe, and you can learn battery usage in detail. With this tweak you will get a great opportunity to access system daemons detailed information. Daemon is an place that every day user don't have access to. Each daemon can show more verbose details on how your iDevice is working with regard to battery life. If you want to unlock iPhone hidden battery usage in iOS 8.1 you need to download the DetailedBatteryUsage tweak. Please note your device must be jailbroken on iOS 8.1 to do it.