For those talking about battery life, My dad had an external case/battery. We played 18 and he uses golfshot, never once did he click the green power save/sleep button while playing. Later that day he was still at 100% battery, I will defiantly be buying this as Golfshot usually takes about 20% of my battery using the sleep mode when playing. He said he got it at a Verizon store.
I use Golfshot GPS during my rounds. After looking at it, I simply hit the power button to turn the display off and put the phone back in my pocket. So far, my phone has never been at less than about 60% charge when I'm finished.
Also, a tip: sometimes Golfshot will get whacked out. You know, when it tells you the yardage to the next hole is 1.2 miles? When that happens to me, it usually won't fix itself and even quitting and restarting the app doesn't help. However, what I've found does fix it is to pause and then resume the round.