Just got done shooting for a day(7hrs of shooting) and I went thru 4 1/2batteries . Shooting the D700 in commander mode, connected to my PC(which makes the camera metering constantly) on a tripod(no VR) used flash on most of the shots. I only shot around 300 pics. I see on ebay there are newer generic batteries out that are rated at 2000 mAh rating which should give longer shooting per battery. Anyone have any luck with any generic batteries in the D700? By the end I had to turn the camera on and off all the time to conserve life. I'm looking at buying at least 4 more batteries so actual Nikon are quite a bit more than generics. Any input is appreciated.