Thank you very much for the compliments! I had doubts as to whether or not I could get a piece to carry in my phone, but it really takes up very little space, and the back battery cover usually has a little flex to it. Lots of times, too, you can take the cover off, pop out the battery, and you'll have a bit more space between the battery and the phone than between the battery and the back cover.
Thanks again!
-Parke1