In the battery's settings there are two option, Normal and Sport, what are the differwncies between the two?

Hi, For the battery, have you allowed few charging cicles to complete? I have a brand new BV9000 and it started lasting one day, and now I get 40/48 hours lasting charge with wifi always on, lots of news reading and WhatsApp messages, audio and video. My rule is never let battery go under 15% and re...