You want to look at the back of the package, and if the little watch batteries are visible on the back, and not installed, then that is a good one. U won't have to look hard they are right there. If the battery's are installed then leave it. That is what I read, so that is what I looked for, and love mine. I posted some vids below in another post. Oh and even thought it says it wont shoot nite video, it will, and it is good! Just my .02