Hi! I recently got the silver knight Optimus prime and grimlock 2-pack from target. I wanted to remove the batteries from the toy but I was unsuccessful. I was able to unscrew the battery panel but I could not remove the batteries (there's a plastic grey piece between the two batteries that I'm not sure what it is for). Anyway I came upon this website after googling for a solution and I saw a few posts about removing batteries from other transformers. Hoping someone here can help me. Thanks!