I feel like I'm getting a 20 percent improvement over the 3G but I still need to charge it every day (sometimes twice) under heavy usage. It's definately not powerful enough when I'm not home or near an outlet. Are you guys satisfied with the 3GS battery life? If not, how often do you use it? I was considering an external battery pack but I tried the morphie juice air before and the thing is way too bulky for me to hold! That was supposed to be the smaller one right?