Catmom: I know this is an old
thread, but if you're still monitoring . . .
Can you really swing a golf club with a PV in your pocket? My ball flight is usually a light draw, but whenever I've got a PV in my pocket, my draw turns into a slice

. I'm kidding of course, but having the PV in my pocket does bug me, so I put the PV into the small pocket at the top of my golf bag when I get the club out, then take it back out when I put the club back in. If your bag doesn't have a pocket in a PV-friendly place, then maybe it's time for a new bag

. There's many reasons for getting a new bag or a new club, and accommodating a PV definitely qualifies as one that is reasonable. In my book, anyway.
More on topic: I carry the shorter IGO battery and it lasts the entire round (although I usually have to change the carto at least once). With a standard KR808 carto (not the IGO carto), it's a little under 5 inches. When I want to work the ball left to right, I put it in my pocket. I've also carried a GoGo at times so that I don't have to change the carto, but like you, I have 73,824 KR808 cartos, so I usually carry the IGO.