Did you recent delete an app? It might be using the app ID instead of the name if you deleted it. Download one of the third-party battery monitoring apps (I think the one people here use it called "GSam" or something) to see if it is still running on your phone. You can also download an app to check each app's ID number (the number your Android system gives it behind the scenes) manually, but if you already deleted it, it will be a waste of time.