I had my ipod touch 4g for 5 months now and i'm not satisfied with the battery life. My ipod touch dies after 3-4 hours of usage. After 20 min of 2-D gaming at a full charge (with wifi off, airplane mode on, bluetooth off, location services off, multitasking cleared, and brightness set at 0) i lose 5% of my battery. I'm also only getting around 3 and a half hours of wifi. Is this normal?