you'll find battery life somewhere to that of the iPhone 5.usage will very by user. realistically, you should see between 3 and 4 hours of actual on screen time. Of course, with LTE or HSPA+, the weaker the signal, the harder the phone has to work to maintain signal. The S3 is a great phone, the best I have ever owned, but at this point you really should stand by to see what the S4 offers. You don't want to regret getting the S3 once the 4 comes out and has some really awesome features.