With iOS 8, It was made possible to get relevant battery usage for applications on iOS. Is there any way to find the battery usage of the system processes on iOS 8? I'm looking for Jailbreak tweaks or Diagnostic tools because there aren't any other options.
DetailedBatteryUsage Cydia tweak from the BigBoss repo shows the battery usage for system processes. It integrated right into the
Battery Status tab inside settings and throws in a neat battery life cycle graph for the last seven days and also displays information about active usage/background usage.