i recently got my new k790, i capture like 10 pics a day, with 2 video recordings of around 1 mins on avg. listen to songs for 25mins or so a day, play games for like 20 mins, send lots of smses, like 50-60 sms per day. and browse through opera mini via edge for around 2 hours per day on average. the battery hardly lasts a day, but then again i use my cell sooo much :)