Adam Hartzell
Yup, I'm a lefty.
In my case, I am often on long, boring conference calls that suck the battery life out of my phone. I don't want to drop off the call to swap batteries (though I do have a spare on me if I know I am going to be out of pocket for an extended period) The other benefit of the Mophie is that I can charge my SkyCaddie, Nexus 7 tablet and Bluetooth speaker with it.
I didn't even think about being able to charge my SkyCaddie with one of these. That makes it even more worth while.