Button Battery X-Rray (IMAGE) Nationwide Children's Hospital Caption The key to differentiating a button battery from a coin is to magnify or zoom into the image looking for a double ring or halo. This X-ray shows a small ridge on the object that this toddler has swallowed -- a button battery. Credit Nationwide Children's Hospital Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.