I just want to make sure this is not a defective battery or phone. I have been surfing the web for about 30 minutes now and my battery meter has drained from about 80% to now 50%. My brightness is on the lowest settings. The gps is off and wifi is off. The current apps running in the background according to advanced task killer is the browser, youtube and messeging. if I need to relay more info please tell me so I can receive a proper answer.