Is your battery life is very bad or data connection seems to be very busy (right hand side top corner shows 2 arrows)?
– Have you installed a new app recently, ask the experts at HWZ and google to see any potential problems arising from other users. If so, delete it.
– Have you upgraded OS, let it stay for a day or two more. If still persists, downgrade your OS, or if there is a newer one, upgrade it.
– Do you have many BBM conferences, contacts and groups? This may also drain your battery life.
There have been reports that the GMAIL ENHANCED pluggin which come built into the OS5 sucks up alot of battery/data. You can remove it by deleting:
