Thank you everybody for the information, I'll be sure to pass it on. I guess if the battery didn't have any acid than inducing vomitting must have been ok, so I guess I won't think badly of the vet. Sarge is still his playful self today and seems to have made it past the danger zone. He most certainly did chew the battery in half because the only way she knew that he ate it at all is because she found the other half before he ate it.