How many shots can i expect from a full battery.

[Don Kuykendall_RIP]

I have Watson and Wasabi batteries to go along with my Nikon batteries. These go in my D7000 and D7100 and I swap batteries in both before I go out shooting for the day just as a matter of course. With 2 cameras being shot between my wife and I we carry 3 spares just in case but never need them. I am afraid the first time we go out without backup is the first time we need the extra battery.
Always have a least 1 spare with you everytime you shoot.

 

[J-see]

I use both the official and the imitation and don't notice much difference between. I've been gone about 3.5 weeks and emptied one battery and have another at 30%. I shot most manual which makes some difference.