The most I had last week was %13. Spotify streaming music, tapatalk, bbm with 4-5 people and text message with one people, incoming/outgoing mails. This was heavy IMO and never saw %20.
By the way, switched to 3G with the same usage (from edge) and my discharge went crazy!!!! It increased from %3.7 to %13.2!
Dont know how this happens? 3G sucks here? Lol