resetting power on password hp pavilion zv5000

I am working on a laptop trying to remove the cmos battery and reset the bios due to lost or forgotton password. I contacted HP and they gave me a step by step disassembly of the laptop, and I have it broke down to almost a shell, yet I still cant find the battery. Does anyone have any idea where I can find this on an HP Pavilion zv5000 laptop?