A new study has named popular gaming app ‘Candy Crush Saga’ and Microsoft’s ‘Outlook’ among the top battery draining android apps. The study, done by 'Battery Doctor' app makers KS mobile, saw camera app ‘Camera360 Ultimate’ topping the list. Moreover, TV and movies app Viki, walkie-talkie app Zello PTT and Temple Run 2 remained the other top ‘battery sucking’ apps.