Thanks for the response Simon. The battery usage is shown across categories like
Screen 40%, Cell standby 26% phone idle 20% Android 4%, media saver and other apps 2%.
I have even switched off the auto brightness option.
Now if I have to download another app to monitor the sleeping apps, I need to enable my data plan.
Basically this means the usage is minimal but consumption is still heavy of the battery.
Do you suggest this could be a case of a faulty battery based on your experience of this system?