I just bought my new lumia a few days ago and the battery hasn't been good. It went from 75% to 0% in 6 hours. During that time period, usage include high twitter & whatsapp usage and little miscellaneous stuff. I'm using data plan during that time though. Is this normal? Anyway to fix this poor battery option? I do realize that when ever I surf the web on my phone, the battery falls drastically.