When your phone battery lasted a week, what did you do on your phone, compared to what you do on it now? If I leave my laptop on standby the battery lasts at least 3-4 days, but if I use it continuously it lasts under 7 hours. Similarly with my smartphone, if I leave it on standby I get 2-3 days, but with "normal" usage - (moderate browsing, emails, texts, phonecalls) I have to charge it either daily or every other day.