Some others have mentioned difficulty getting this item to work properly.
I had no problem getting this to work once I figured that you first need to just install the factory battery in the right-side bay and turn the camera on. Power the camera off and insert any EN EL14 compatible battery in the left-side bay.
Others have commented on the remote wire required to activate the attached shutter button. Think of this shutter button as a bonus and a compromise and be happy that its available.