Miniature battery (IMAGE) University of Oxford Caption The tiny battery features important capabilities that enable a variety of biomedical applications, including powering drug molecule release, heart defibrillation and microrobotic energy delivery. Image credit: Yujia Zhang. Credit Yujia Zhang. Usage Restrictions The image is for editorial purposes ONLY and must be credited. It MUST NOT be sold on to third parties. License Original 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.