In most cases you can. Our return policy is on our site at https://www.bhphotovideo.com/find/HelpCenter/ReturnExchange.jsp
You can intiiate a return online or via cs@bhphoto.com.
The Nikon P1000 camera is on our site at https://bhpho.to/2le9bkx. The Nikon EN-EL20a battery is on our site at https://bhpho.to/2leaq3b. The Nikon EN-EL5 is on our site at https://bhpho.to/2lebl3D
B&H does not have a repair department. I've had good experiences with Photo Tech Repair Service. That's a personal comment, not a company endorsement.^hp