Hi everyone, I have just purchased the Golfshot golf gps application and after using it for one round, more accurately 12 holes of 18, the battery went bye bye. The app is a power hog, but it is fantastic otherwise. I have the 1500mah everyone recommended in other threads. Anyhow, my question...what is the best portable battery pack available for the incredible. Something with tons of juice that I can plug my incredible into while playing a round of golf. Thank you in advance!