how often has he set his sync to happen? if its polling his email servers every 5 minutes over 3g I should imagine it would sap the power. By the sound of it unless hes turning off mobile networks for data its staying connected full time which 4 hours use is about right. Battery life does get better after 2-3 weeks of using it which is strange and I cant think of any reasonable reason? When I first got mine it would just last a day, now it lasts from friday night to monday morning with reasonable use.